./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:21:08,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:21:08,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:21:08,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:21:08,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:21:08,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:21:08,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:21:08,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:21:08,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:21:08,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:21:08,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:21:08,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:21:08,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:21:08,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:21:08,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:21:08,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:21:08,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:21:08,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:21:08,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:21:08,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:21:08,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:21:08,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:21:08,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:21:08,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:21:08,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:21:08,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:21:08,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:21:08,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:21:08,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:21:08,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:21:08,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:21:08,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:21:08,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:21:08,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:21:08,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:21:08,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:21:08,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:21:08,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:21:08,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:21:08,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:21:08,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:21:08,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:21:08,358 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:21:08,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:21:08,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:21:08,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:21:08,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:21:08,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:21:08,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:21:08,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:21:08,361 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:21:08,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:21:08,362 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:21:08,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:21:08,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:21:08,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:21:08,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:21:08,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:21:08,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:21:08,363 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:21:08,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:21:08,364 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:21:08,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:21:08,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:21:08,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:21:08,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:21:08,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:21:08,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:21:08,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:21:08,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:21:08,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:21:08,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:21:08,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:21:08,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:21:08,366 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:21:08,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:21:08,367 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:21:08,367 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:21:08,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:21:08,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:21:08,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:21:08,720 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:21:08,720 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:21:08,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-31 00:21:09,855 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:21:10,118 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:21:10,118 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-31 00:21:10,134 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07243ccd/529e546873a344dca0af4696f4cd0d82/FLAG03383e261 [2023-08-31 00:21:10,149 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d07243ccd/529e546873a344dca0af4696f4cd0d82 [2023-08-31 00:21:10,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:21:10,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:21:10,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:21:10,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:21:10,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:21:10,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f82e017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10, skipping insertion in model container [2023-08-31 00:21:10,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:21:10,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:21:10,577 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-31 00:21:10,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:21:10,638 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:21:10,705 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-31 00:21:10,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:21:10,816 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:21:10,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10 WrapperNode [2023-08-31 00:21:10,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:21:10,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:21:10,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:21:10,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:21:10,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,888 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 195 [2023-08-31 00:21:10,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:21:10,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:21:10,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:21:10,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:21:10,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,944 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:21:10,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:21:10,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:21:10,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:21:10,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (1/1) ... [2023-08-31 00:21:10,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:21:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:10,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 00:21:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 00:21:11,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:21:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:21:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:21:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:21:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:21:11,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:21:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:21:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:21:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:21:11,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:21:11,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:21:11,033 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:21:11,157 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:21:11,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:21:11,379 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:21:11,387 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:21:11,388 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-08-31 00:21:11,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:21:11 BoogieIcfgContainer [2023-08-31 00:21:11,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:21:11,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:21:11,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:21:11,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:21:11,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:21:10" (1/3) ... [2023-08-31 00:21:11,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3253863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:21:11, skipping insertion in model container [2023-08-31 00:21:11,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:10" (2/3) ... [2023-08-31 00:21:11,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3253863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:21:11, skipping insertion in model container [2023-08-31 00:21:11,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:21:11" (3/3) ... [2023-08-31 00:21:11,397 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-08-31 00:21:11,407 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:21:11,415 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:21:11,415 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-31 00:21:11,415 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:21:11,485 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:21:11,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 192 transitions, 392 flow [2023-08-31 00:21:11,613 INFO L130 PetriNetUnfolder]: 49/273 cut-off events. [2023-08-31 00:21:11,614 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:21:11,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 49/273 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 975 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-31 00:21:11,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 192 transitions, 392 flow [2023-08-31 00:21:11,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 187 transitions, 379 flow [2023-08-31 00:21:11,637 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:21:11,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 187 transitions, 379 flow [2023-08-31 00:21:11,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 187 transitions, 379 flow [2023-08-31 00:21:11,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 187 transitions, 379 flow [2023-08-31 00:21:11,709 INFO L130 PetriNetUnfolder]: 48/268 cut-off events. [2023-08-31 00:21:11,710 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:11,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 48/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 917 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-31 00:21:11,723 INFO L119 LiptonReduction]: Number of co-enabled transitions 12006 [2023-08-31 00:21:14,186 INFO L134 LiptonReduction]: Checked pairs total: 18220 [2023-08-31 00:21:14,187 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-31 00:21:14,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:21:14,224 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e2b00c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:21:14,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 00:21:14,235 INFO L130 PetriNetUnfolder]: 9/29 cut-off events. [2023-08-31 00:21:14,235 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:14,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:14,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:14,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:21:14,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash -939429078, now seen corresponding path program 1 times [2023-08-31 00:21:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598613476] [2023-08-31 00:21:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:14,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:14,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598613476] [2023-08-31 00:21:14,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598613476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:14,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:21:14,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:21:14,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917648616] [2023-08-31 00:21:14,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:14,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:21:14,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-31 00:21:14,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:14,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:14,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-31 00:21:14,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:14,786 INFO L130 PetriNetUnfolder]: 380/772 cut-off events. [2023-08-31 00:21:14,787 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:14,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 772 events. 380/772 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3513 event pairs, 306 based on Foata normal form. 76/711 useless extension candidates. Maximal degree in co-relation 1428. Up to 707 conditions per place. [2023-08-31 00:21:14,792 INFO L137 encePairwiseOnDemand]: 316/342 looper letters, 40 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-31 00:21:14,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 185 flow [2023-08-31 00:21:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:21:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:21:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-31 00:21:14,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233918128654971 [2023-08-31 00:21:14,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-31 00:21:14,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-31 00:21:14,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:14,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-31 00:21:14,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:14,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:14,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:14,833 INFO L175 Difference]: Start difference. First operand has 46 places, 70 transitions, 145 flow. Second operand 3 states and 537 transitions. [2023-08-31 00:21:14,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 185 flow [2023-08-31 00:21:14,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 185 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:21:14,839 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 111 flow [2023-08-31 00:21:14,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-31 00:21:14,844 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-31 00:21:14,844 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 111 flow [2023-08-31 00:21:14,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:14,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:14,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:14,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:21:14,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:21:14,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1428636333, now seen corresponding path program 1 times [2023-08-31 00:21:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:14,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188829604] [2023-08-31 00:21:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:14,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188829604] [2023-08-31 00:21:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188829604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:14,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746932671] [2023-08-31 00:21:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:14,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:14,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:14,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:21:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:21:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:21:15,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:21:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746932671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:15,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:21:15,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:21:15,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526893793] [2023-08-31 00:21:15,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:15,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:15,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:21:15,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-31 00:21:15,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 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) [2023-08-31 00:21:15,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:15,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-31 00:21:15,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:15,257 INFO L130 PetriNetUnfolder]: 363/764 cut-off events. [2023-08-31 00:21:15,257 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:15,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 764 events. 363/764 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3863 event pairs, 0 based on Foata normal form. 0/634 useless extension candidates. Maximal degree in co-relation 1472. Up to 670 conditions per place. [2023-08-31 00:21:15,261 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 59 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-31 00:21:15,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 271 flow [2023-08-31 00:21:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:21:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:21:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2023-08-31 00:21:15,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-31 00:21:15,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2023-08-31 00:21:15,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2023-08-31 00:21:15,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:15,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2023-08-31 00:21:15,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,269 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 111 flow. Second operand 3 states and 532 transitions. [2023-08-31 00:21:15,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 271 flow [2023-08-31 00:21:15,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 267 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:15,272 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 115 flow [2023-08-31 00:21:15,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-31 00:21:15,273 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-31 00:21:15,273 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 115 flow [2023-08-31 00:21:15,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 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) [2023-08-31 00:21:15,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:15,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:15,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:15,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:21:15,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:15,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1418114387, now seen corresponding path program 1 times [2023-08-31 00:21:15,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:15,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620240280] [2023-08-31 00:21:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:15,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:15,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:15,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620240280] [2023-08-31 00:21:15,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620240280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:15,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134764040] [2023-08-31 00:21:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:15,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:15,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:15,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:15,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:21:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:15,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:21:15,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:15,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:15,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134764040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:15,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:15,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:21:15,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056728694] [2023-08-31 00:21:15,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:15,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:21:15,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:15,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:21:15,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:21:15,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-31 00:21:15,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:15,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-31 00:21:15,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:15,896 INFO L130 PetriNetUnfolder]: 380/759 cut-off events. [2023-08-31 00:21:15,896 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-31 00:21:15,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 759 events. 380/759 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3354 event pairs, 306 based on Foata normal form. 3/646 useless extension candidates. Maximal degree in co-relation 1496. Up to 690 conditions per place. [2023-08-31 00:21:15,900 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 40 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-08-31 00:21:15,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 217 flow [2023-08-31 00:21:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:21:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:21:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-31 00:21:15,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2023-08-31 00:21:15,904 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-31 00:21:15,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-31 00:21:15,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:15,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-31 00:21:15,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,911 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,912 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 115 flow. Second operand 6 states and 984 transitions. [2023-08-31 00:21:15,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 217 flow [2023-08-31 00:21:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 00:21:15,914 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 147 flow [2023-08-31 00:21:15,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=147, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-08-31 00:21:15,915 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-31 00:21:15,915 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 147 flow [2023-08-31 00:21:15,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:15,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:15,916 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 00:21:15,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:16,124 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,SelfDestructingSolverStorable2 [2023-08-31 00:21:16,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:21:16,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:16,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1765262020, now seen corresponding path program 2 times [2023-08-31 00:21:16,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563473833] [2023-08-31 00:21:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563473833] [2023-08-31 00:21:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563473833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593005191] [2023-08-31 00:21:16,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:21:16,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:16,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:16,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:21:16,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:21:16,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:21:16,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:21:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:16,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593005191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:16,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:16,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 00:21:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003275986] [2023-08-31 00:21:16,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:16,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 00:21:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 00:21:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 00:21:16,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-31 00:21:16,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 147 flow. Second operand has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:16,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:16,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-31 00:21:16,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:16,654 INFO L130 PetriNetUnfolder]: 380/765 cut-off events. [2023-08-31 00:21:16,654 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-31 00:21:16,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1543 conditions, 765 events. 380/765 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3348 event pairs, 306 based on Foata normal form. 6/655 useless extension candidates. Maximal degree in co-relation 1484. Up to 690 conditions per place. [2023-08-31 00:21:16,658 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 40 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2023-08-31 00:21:16,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 285 flow [2023-08-31 00:21:16,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:21:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:21:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1929 transitions. [2023-08-31 00:21:16,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47002923976608185 [2023-08-31 00:21:16,663 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1929 transitions. [2023-08-31 00:21:16,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1929 transitions. [2023-08-31 00:21:16,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:16,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1929 transitions. [2023-08-31 00:21:16,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.75) internal successors, (1929), 12 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:16,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:16,676 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:16,676 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 147 flow. Second operand 12 states and 1929 transitions. [2023-08-31 00:21:16,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 285 flow [2023-08-31 00:21:16,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 271 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:16,679 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 217 flow [2023-08-31 00:21:16,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=217, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2023-08-31 00:21:16,680 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2023-08-31 00:21:16,680 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 217 flow [2023-08-31 00:21:16,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:16,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:16,681 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 00:21:16,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:16,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:16,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-31 00:21:16,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash -989558236, now seen corresponding path program 3 times [2023-08-31 00:21:16,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:16,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323350616] [2023-08-31 00:21:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:16,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:16,927 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:21:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:16,973 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:21:16,974 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:21:16,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-31 00:21:16,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-31 00:21:16,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-31 00:21:16,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-31 00:21:16,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:21:16,978 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-31 00:21:16,980 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:21:16,980 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:21:17,029 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:21:17,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-08-31 00:21:17,094 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-08-31 00:21:17,094 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:21:17,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-08-31 00:21:17,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 263 transitions, 544 flow [2023-08-31 00:21:17,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 263 transitions, 544 flow [2023-08-31 00:21:17,101 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:21:17,101 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 263 transitions, 544 flow [2023-08-31 00:21:17,102 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 263 transitions, 544 flow [2023-08-31 00:21:17,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-08-31 00:21:17,153 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-08-31 00:21:17,154 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:21:17,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-08-31 00:21:17,178 INFO L119 LiptonReduction]: Number of co-enabled transitions 35052 [2023-08-31 00:21:19,959 INFO L134 LiptonReduction]: Checked pairs total: 57347 [2023-08-31 00:21:19,959 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-31 00:21:19,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:21:19,961 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e2b00c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:21:19,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:21:19,965 INFO L130 PetriNetUnfolder]: 9/31 cut-off events. [2023-08-31 00:21:19,965 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:19,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:19,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:19,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:21:19,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash -865673532, now seen corresponding path program 1 times [2023-08-31 00:21:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713122856] [2023-08-31 00:21:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:19,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:19,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713122856] [2023-08-31 00:21:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713122856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:19,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:21:19,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:21:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527113313] [2023-08-31 00:21:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:21:20,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 466 [2023-08-31 00:21:20,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:20,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:20,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 466 [2023-08-31 00:21:20,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:21,554 INFO L130 PetriNetUnfolder]: 12109/18691 cut-off events. [2023-08-31 00:21:21,555 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-31 00:21:21,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35981 conditions, 18691 events. 12109/18691 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 120028 event pairs, 10328 based on Foata normal form. 3243/18283 useless extension candidates. Maximal degree in co-relation 12239. Up to 17187 conditions per place. [2023-08-31 00:21:21,674 INFO L137 encePairwiseOnDemand]: 431/466 looper letters, 60 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-31 00:21:21,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 294 flow [2023-08-31 00:21:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:21:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:21:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2023-08-31 00:21:21,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525035765379113 [2023-08-31 00:21:21,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2023-08-31 00:21:21,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2023-08-31 00:21:21,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:21,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2023-08-31 00:21:21,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:21,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:21,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:21,686 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 232 flow. Second operand 3 states and 734 transitions. [2023-08-31 00:21:21,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 294 flow [2023-08-31 00:21:21,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:21:21,690 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 180 flow [2023-08-31 00:21:21,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-31 00:21:21,694 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-31 00:21:21,695 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 180 flow [2023-08-31 00:21:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:21,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:21,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:21,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 00:21:21,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:21:21,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash -343090330, now seen corresponding path program 1 times [2023-08-31 00:21:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:21,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421830013] [2023-08-31 00:21:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:21,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:21,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421830013] [2023-08-31 00:21:21,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421830013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:21,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889912120] [2023-08-31 00:21:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:21,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:21,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:21,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:21,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 00:21:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:21:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:21:21,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:21:21,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889912120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:21,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:21:21,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:21:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426842830] [2023-08-31 00:21:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:21,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:21,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:21,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:21:21,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 466 [2023-08-31 00:21:21,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:21,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:21,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 466 [2023-08-31 00:21:21,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:23,180 INFO L130 PetriNetUnfolder]: 11900/18501 cut-off events. [2023-08-31 00:21:23,181 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-31 00:21:23,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35800 conditions, 18501 events. 11900/18501 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 121141 event pairs, 4928 based on Foata normal form. 0/14839 useless extension candidates. Maximal degree in co-relation 35787. Up to 17153 conditions per place. [2023-08-31 00:21:23,288 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 78 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-31 00:21:23,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 376 flow [2023-08-31 00:21:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:21:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:21:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-08-31 00:21:23,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143061516452074 [2023-08-31 00:21:23,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-08-31 00:21:23,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-08-31 00:21:23,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:23,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-08-31 00:21:23,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:23,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:23,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:23,296 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 180 flow. Second operand 3 states and 719 transitions. [2023-08-31 00:21:23,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 376 flow [2023-08-31 00:21:23,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 372 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:23,302 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 188 flow [2023-08-31 00:21:23,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-08-31 00:21:23,303 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-31 00:21:23,303 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 188 flow [2023-08-31 00:21:23,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:23,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:23,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:23,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:23,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:23,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:21:23,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:23,510 INFO L85 PathProgramCache]: Analyzing trace with hash -291431057, now seen corresponding path program 1 times [2023-08-31 00:21:23,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:23,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524501410] [2023-08-31 00:21:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:23,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:23,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524501410] [2023-08-31 00:21:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524501410] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914851418] [2023-08-31 00:21:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:23,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:23,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:23,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 00:21:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:21:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:23,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914851418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:23,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:21:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674930514] [2023-08-31 00:21:23,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:21:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:21:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:21:23,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 466 [2023-08-31 00:21:23,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 214.14285714285714) internal successors, (1499), 7 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:23,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:23,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 466 [2023-08-31 00:21:23,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:24,880 INFO L130 PetriNetUnfolder]: 12152/18699 cut-off events. [2023-08-31 00:21:24,880 INFO L131 PetriNetUnfolder]: For 704/704 co-relation queries the response was YES. [2023-08-31 00:21:24,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36578 conditions, 18699 events. 12152/18699 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 119438 event pairs, 10328 based on Foata normal form. 3/15288 useless extension candidates. Maximal degree in co-relation 36550. Up to 17171 conditions per place. [2023-08-31 00:21:24,967 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 61 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-31 00:21:24,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 332 flow [2023-08-31 00:21:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:21:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:21:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1340 transitions. [2023-08-31 00:21:24,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4792560801144492 [2023-08-31 00:21:24,972 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1340 transitions. [2023-08-31 00:21:24,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1340 transitions. [2023-08-31 00:21:24,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:24,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1340 transitions. [2023-08-31 00:21:24,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.33333333333334) internal successors, (1340), 6 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:24,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:24,981 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:24,982 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 188 flow. Second operand 6 states and 1340 transitions. [2023-08-31 00:21:24,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 332 flow [2023-08-31 00:21:24,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:24,987 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 222 flow [2023-08-31 00:21:24,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-31 00:21:24,989 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2023-08-31 00:21:24,989 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 222 flow [2023-08-31 00:21:24,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.14285714285714) internal successors, (1499), 7 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:24,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:24,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:24,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:25,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:21:25,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1250867661, now seen corresponding path program 2 times [2023-08-31 00:21:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:25,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323636699] [2023-08-31 00:21:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:25,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:25,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:25,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323636699] [2023-08-31 00:21:25,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323636699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:25,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675837346] [2023-08-31 00:21:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:21:25,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:25,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:25,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:25,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 00:21:25,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:21:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:21:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:21:25,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:25,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:21:25,501 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:21:25,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:21:25,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:21:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:21:25,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:21:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675837346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:25,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:21:25,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:21:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145685829] [2023-08-31 00:21:25,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:21:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:21:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:21:25,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 466 [2023-08-31 00:21:25,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:25,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:25,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 466 [2023-08-31 00:21:25,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:27,475 INFO L130 PetriNetUnfolder]: 16090/25377 cut-off events. [2023-08-31 00:21:27,475 INFO L131 PetriNetUnfolder]: For 1042/1042 co-relation queries the response was YES. [2023-08-31 00:21:27,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49889 conditions, 25377 events. 16090/25377 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 178528 event pairs, 2043 based on Foata normal form. 0/20651 useless extension candidates. Maximal degree in co-relation 49853. Up to 16968 conditions per place. [2023-08-31 00:21:27,597 INFO L137 encePairwiseOnDemand]: 458/466 looper letters, 168 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2023-08-31 00:21:27,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 196 transitions, 852 flow [2023-08-31 00:21:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:21:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:21:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1389 transitions. [2023-08-31 00:21:27,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967811158798283 [2023-08-31 00:21:27,602 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1389 transitions. [2023-08-31 00:21:27,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1389 transitions. [2023-08-31 00:21:27,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:27,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1389 transitions. [2023-08-31 00:21:27,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.5) internal successors, (1389), 6 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:27,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:27,610 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:27,610 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 222 flow. Second operand 6 states and 1389 transitions. [2023-08-31 00:21:27,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 196 transitions, 852 flow [2023-08-31 00:21:27,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 196 transitions, 838 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:27,614 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 295 flow [2023-08-31 00:21:27,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2023-08-31 00:21:27,615 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-08-31 00:21:27,615 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 295 flow [2023-08-31 00:21:27,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.66666666666666) internal successors, (1222), 6 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:27,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:27,616 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:27,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:27,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:27,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:21:27,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:27,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1986675831, now seen corresponding path program 1 times [2023-08-31 00:21:27,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:27,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30659436] [2023-08-31 00:21:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:27,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:21:27,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30659436] [2023-08-31 00:21:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30659436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146756237] [2023-08-31 00:21:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:27,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:27,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:27,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:27,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 00:21:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:27,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:21:27,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:21:27,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:21:28,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146756237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:28,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:28,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-31 00:21:28,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596903418] [2023-08-31 00:21:28,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:28,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 00:21:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 00:21:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-31 00:21:28,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 466 [2023-08-31 00:21:28,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 295 flow. Second operand has 14 states, 14 states have (on average 210.92857142857142) internal successors, (2953), 14 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:28,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:28,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 466 [2023-08-31 00:21:28,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:29,814 INFO L130 PetriNetUnfolder]: 16228/25610 cut-off events. [2023-08-31 00:21:29,814 INFO L131 PetriNetUnfolder]: For 5101/5101 co-relation queries the response was YES. [2023-08-31 00:21:29,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55700 conditions, 25610 events. 16228/25610 cut-off events. For 5101/5101 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 182902 event pairs, 203 based on Foata normal form. 33/22407 useless extension candidates. Maximal degree in co-relation 55641. Up to 22706 conditions per place. [2023-08-31 00:21:30,097 INFO L137 encePairwiseOnDemand]: 461/466 looper letters, 127 selfloop transitions, 14 changer transitions 0/155 dead transitions. [2023-08-31 00:21:30,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 769 flow [2023-08-31 00:21:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:21:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:21:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3056 transitions. [2023-08-31 00:21:30,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46842427958307786 [2023-08-31 00:21:30,112 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3056 transitions. [2023-08-31 00:21:30,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3056 transitions. [2023-08-31 00:21:30,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:30,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3056 transitions. [2023-08-31 00:21:30,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 218.28571428571428) internal successors, (3056), 14 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:30,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 466.0) internal successors, (6990), 15 states have internal predecessors, (6990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:30,150 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 466.0) internal successors, (6990), 15 states have internal predecessors, (6990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:30,150 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 295 flow. Second operand 14 states and 3056 transitions. [2023-08-31 00:21:30,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 769 flow [2023-08-31 00:21:30,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 769 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:21:30,175 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 365 flow [2023-08-31 00:21:30,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=365, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2023-08-31 00:21:30,176 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2023-08-31 00:21:30,176 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 365 flow [2023-08-31 00:21:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 210.92857142857142) internal successors, (2953), 14 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:30,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:30,177 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 00:21:30,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:30,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:30,383 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-31 00:21:30,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1189684003, now seen corresponding path program 1 times [2023-08-31 00:21:30,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:30,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147608986] [2023-08-31 00:21:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:30,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:21:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:30,451 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:21:30,451 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:21:30,451 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:21:30,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:21:30,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-31 00:21:30,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:21:30,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:21:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:21:30,453 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-08-31 00:21:30,454 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:21:30,454 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:21:30,491 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:21:30,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 334 transitions, 698 flow [2023-08-31 00:21:30,576 INFO L130 PetriNetUnfolder]: 120/656 cut-off events. [2023-08-31 00:21:30,576 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:21:30,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 656 events. 120/656 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3152 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2023-08-31 00:21:30,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 334 transitions, 698 flow [2023-08-31 00:21:30,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 334 transitions, 698 flow [2023-08-31 00:21:30,589 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:21:30,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 334 transitions, 698 flow [2023-08-31 00:21:30,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 334 transitions, 698 flow [2023-08-31 00:21:30,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 334 transitions, 698 flow [2023-08-31 00:21:30,663 INFO L130 PetriNetUnfolder]: 120/656 cut-off events. [2023-08-31 00:21:30,663 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:21:30,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 656 events. 120/656 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3152 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2023-08-31 00:21:30,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 67482 [2023-08-31 00:21:33,974 INFO L134 LiptonReduction]: Checked pairs total: 115379 [2023-08-31 00:21:33,975 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-08-31 00:21:33,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:21:33,977 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e2b00c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:21:33,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:21:33,979 INFO L130 PetriNetUnfolder]: 9/31 cut-off events. [2023-08-31 00:21:33,979 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:33,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:33,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:33,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:21:33,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:33,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1293736058, now seen corresponding path program 1 times [2023-08-31 00:21:33,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:33,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739938566] [2023-08-31 00:21:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:33,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:33,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:33,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739938566] [2023-08-31 00:21:33,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739938566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:34,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:21:34,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:21:34,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115410637] [2023-08-31 00:21:34,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:34,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:34,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:21:34,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 593 [2023-08-31 00:21:34,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 139 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:21:34,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:34,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 593 [2023-08-31 00:21:34,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:58,113 INFO L130 PetriNetUnfolder]: 291611/404344 cut-off events. [2023-08-31 00:21:58,113 INFO L131 PetriNetUnfolder]: For 4198/4198 co-relation queries the response was YES. [2023-08-31 00:21:58,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779861 conditions, 404344 events. 291611/404344 cut-off events. For 4198/4198 co-relation queries the response was YES. Maximal size of possible extension queue 8917. Compared 3058711 event pairs, 255919 based on Foata normal form. 69865/397351 useless extension candidates. Maximal degree in co-relation 87034. Up to 373221 conditions per place. [2023-08-31 00:22:00,216 INFO L137 encePairwiseOnDemand]: 548/593 looper letters, 78 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-31 00:22:00,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 98 transitions, 386 flow [2023-08-31 00:22:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:22:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:22:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 930 transitions. [2023-08-31 00:22:00,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227655986509275 [2023-08-31 00:22:00,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 930 transitions. [2023-08-31 00:22:00,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 930 transitions. [2023-08-31 00:22:00,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:00,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 930 transitions. [2023-08-31 00:22:00,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:00,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:00,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:00,226 INFO L175 Difference]: Start difference. First operand has 92 places, 139 transitions, 308 flow. Second operand 3 states and 930 transitions. [2023-08-31 00:22:00,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 98 transitions, 386 flow [2023-08-31 00:22:00,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:22:00,229 INFO L231 Difference]: Finished difference. Result has 95 places, 98 transitions, 236 flow [2023-08-31 00:22:00,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=95, PETRI_TRANSITIONS=98} [2023-08-31 00:22:00,231 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-08-31 00:22:00,231 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 98 transitions, 236 flow [2023-08-31 00:22:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:00,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:00,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:00,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 00:22:00,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:22:00,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -709142302, now seen corresponding path program 1 times [2023-08-31 00:22:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:00,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37731470] [2023-08-31 00:22:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:00,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37731470] [2023-08-31 00:22:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37731470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261826526] [2023-08-31 00:22:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:00,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:00,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:22:00,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 00:22:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:22:00,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:22:00,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:22:00,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261826526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:00,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:22:00,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:22:00,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141237477] [2023-08-31 00:22:00,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:00,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:22:00,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:22:00,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:22:00,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 593 [2023-08-31 00:22:00,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 98 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:00,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:00,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 593 [2023-08-31 00:22:00,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:22,850 INFO L130 PetriNetUnfolder]: 291662/404953 cut-off events. [2023-08-31 00:22:22,851 INFO L131 PetriNetUnfolder]: For 4163/4163 co-relation queries the response was YES. [2023-08-31 00:22:23,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780545 conditions, 404953 events. 291662/404953 cut-off events. For 4163/4163 co-relation queries the response was YES. Maximal size of possible extension queue 9003. Compared 3078422 event pairs, 167704 based on Foata normal form. 0/327896 useless extension candidates. Maximal degree in co-relation 780531. Up to 373187 conditions per place. [2023-08-31 00:22:25,115 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 96 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-08-31 00:22:25,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 116 transitions, 468 flow [2023-08-31 00:22:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:22:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:22:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 905 transitions. [2023-08-31 00:22:25,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087127599775154 [2023-08-31 00:22:25,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 905 transitions. [2023-08-31 00:22:25,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 905 transitions. [2023-08-31 00:22:25,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:25,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 905 transitions. [2023-08-31 00:22:25,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:25,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:25,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:25,123 INFO L175 Difference]: Start difference. First operand has 95 places, 98 transitions, 236 flow. Second operand 3 states and 905 transitions. [2023-08-31 00:22:25,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 116 transitions, 468 flow [2023-08-31 00:22:25,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 116 transitions, 464 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:22:25,127 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 244 flow [2023-08-31 00:22:25,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2023-08-31 00:22:25,128 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-08-31 00:22:25,128 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 244 flow [2023-08-31 00:22:25,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:25,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:25,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:25,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 00:22:25,333 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,SelfDestructingSolverStorable12 [2023-08-31 00:22:25,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:22:25,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash 849796602, now seen corresponding path program 1 times [2023-08-31 00:22:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060244532] [2023-08-31 00:22:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:25,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:25,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060244532] [2023-08-31 00:22:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060244532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081934097] [2023-08-31 00:22:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:25,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:25,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:25,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:22:25,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 00:22:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:22:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:25,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:22:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:25,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081934097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:22:25,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:22:25,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:22:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342157740] [2023-08-31 00:22:25,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:22:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:22:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:22:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:22:25,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 593 [2023-08-31 00:22:25,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 270.14285714285717) internal successors, (1891), 7 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:25,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:25,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 593 [2023-08-31 00:22:25,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:51,031 INFO L130 PetriNetUnfolder]: 294236/406552 cut-off events. [2023-08-31 00:22:51,032 INFO L131 PetriNetUnfolder]: For 13388/13388 co-relation queries the response was YES. [2023-08-31 00:22:52,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791362 conditions, 406552 events. 294236/406552 cut-off events. For 13388/13388 co-relation queries the response was YES. Maximal size of possible extension queue 8969. Compared 3050744 event pairs, 255919 based on Foata normal form. 3/333719 useless extension candidates. Maximal degree in co-relation 791333. Up to 373205 conditions per place. [2023-08-31 00:22:53,839 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 79 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2023-08-31 00:22:53,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 424 flow [2023-08-31 00:22:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:22:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:22:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1694 transitions. [2023-08-31 00:22:53,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4761101742551995 [2023-08-31 00:22:53,859 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1694 transitions. [2023-08-31 00:22:53,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1694 transitions. [2023-08-31 00:22:53,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:53,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1694 transitions. [2023-08-31 00:22:53,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.3333333333333) internal successors, (1694), 6 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,875 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,875 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 244 flow. Second operand 6 states and 1694 transitions. [2023-08-31 00:22:53,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 424 flow [2023-08-31 00:22:53,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 102 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:22:53,902 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 278 flow [2023-08-31 00:22:53,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2023-08-31 00:22:53,903 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 12 predicate places. [2023-08-31 00:22:53,903 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 278 flow [2023-08-31 00:22:53,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 270.14285714285717) internal successors, (1891), 7 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:53,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:53,904 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:53,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 00:22:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 00:22:54,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:22:54,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 447295890, now seen corresponding path program 2 times [2023-08-31 00:22:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:54,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065870728] [2023-08-31 00:22:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:54,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:54,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065870728] [2023-08-31 00:22:54,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065870728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:54,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629577354] [2023-08-31 00:22:54,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:22:54,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:54,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:22:54,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 00:22:54,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:22:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:22:54,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:22:54,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:54,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:22:54,410 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:22:54,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:22:54,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:22:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:22:54,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:22:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629577354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:54,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:22:54,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:22:54,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916765314] [2023-08-31 00:22:54,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:54,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:22:54,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:22:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:22:54,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 593 [2023-08-31 00:22:54,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 257.6666666666667) internal successors, (1546), 6 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:22:54,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:54,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 593 [2023-08-31 00:22:54,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:23:25,258 INFO L130 PetriNetUnfolder]: 363774/509446 cut-off events. [2023-08-31 00:23:25,258 INFO L131 PetriNetUnfolder]: For 17997/17997 co-relation queries the response was YES. [2023-08-31 00:23:26,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997795 conditions, 509446 events. 363774/509446 cut-off events. For 17997/17997 co-relation queries the response was YES. Maximal size of possible extension queue 11571. Compared 4097240 event pairs, 50261 based on Foata normal form. 0/417065 useless extension candidates. Maximal degree in co-relation 997758. Up to 365262 conditions per place. [2023-08-31 00:23:28,075 INFO L137 encePairwiseOnDemand]: 584/593 looper letters, 238 selfloop transitions, 18 changer transitions 0/274 dead transitions. [2023-08-31 00:23:28,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 274 transitions, 1188 flow [2023-08-31 00:23:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:23:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:23:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1787 transitions. [2023-08-31 00:23:28,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022484541877459 [2023-08-31 00:23:28,079 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1787 transitions. [2023-08-31 00:23:28,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1787 transitions. [2023-08-31 00:23:28,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:23:28,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1787 transitions. [2023-08-31 00:23:28,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.8333333333333) internal successors, (1787), 6 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:28,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:28,088 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:28,088 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 278 flow. Second operand 6 states and 1787 transitions. [2023-08-31 00:23:28,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 274 transitions, 1188 flow [2023-08-31 00:23:28,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 274 transitions, 1174 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:23:28,114 INFO L231 Difference]: Finished difference. Result has 112 places, 118 transitions, 373 flow [2023-08-31 00:23:28,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=112, PETRI_TRANSITIONS=118} [2023-08-31 00:23:28,115 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 20 predicate places. [2023-08-31 00:23:28,115 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 118 transitions, 373 flow [2023-08-31 00:23:28,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 257.6666666666667) internal successors, (1546), 6 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:28,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:23:28,116 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:23:28,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 00:23:28,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 00:23:28,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:23:28,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:23:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash -506639879, now seen corresponding path program 1 times [2023-08-31 00:23:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:23:28,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588395234] [2023-08-31 00:23:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:23:28,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:23:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:23:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:23:28,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:23:28,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588395234] [2023-08-31 00:23:28,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588395234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:23:28,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302356611] [2023-08-31 00:23:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:23:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:23:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:23:28,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:23:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 00:23:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:23:28,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:23:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:23:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:23:28,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:23:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:23:28,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302356611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:23:28,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:23:28,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-31 00:23:28,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255128588] [2023-08-31 00:23:28,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:23:28,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 00:23:28,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:23:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 00:23:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-31 00:23:28,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 593 [2023-08-31 00:23:28,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 118 transitions, 373 flow. Second operand has 14 states, 14 states have (on average 266.92857142857144) internal successors, (3737), 14 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:23:28,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:23:28,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 593 [2023-08-31 00:23:28,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:24:08,405 INFO L130 PetriNetUnfolder]: 373688/518425 cut-off events. [2023-08-31 00:24:08,405 INFO L131 PetriNetUnfolder]: For 97959/98031 co-relation queries the response was YES. [2023-08-31 00:24:09,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1100743 conditions, 518425 events. 373688/518425 cut-off events. For 97959/98031 co-relation queries the response was YES. Maximal size of possible extension queue 11373. Compared 4086853 event pairs, 101845 based on Foata normal form. 32/442375 useless extension candidates. Maximal degree in co-relation 1100683. Up to 486144 conditions per place. [2023-08-31 00:24:11,691 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 150 selfloop transitions, 14 changer transitions 0/182 dead transitions. [2023-08-31 00:24:11,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 182 transitions, 897 flow [2023-08-31 00:24:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:24:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:24:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3859 transitions. [2023-08-31 00:24:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648277523488316 [2023-08-31 00:24:11,697 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3859 transitions. [2023-08-31 00:24:11,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3859 transitions. [2023-08-31 00:24:11,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:24:11,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3859 transitions. [2023-08-31 00:24:11,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 275.64285714285717) internal successors, (3859), 14 states have internal predecessors, (3859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:11,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 593.0) internal successors, (8895), 15 states have internal predecessors, (8895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:11,713 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 593.0) internal successors, (8895), 15 states have internal predecessors, (8895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:11,713 INFO L175 Difference]: Start difference. First operand has 112 places, 118 transitions, 373 flow. Second operand 14 states and 3859 transitions. [2023-08-31 00:24:11,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 182 transitions, 897 flow [2023-08-31 00:24:12,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 182 transitions, 897 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:24:12,144 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 449 flow [2023-08-31 00:24:12,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=449, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2023-08-31 00:24:12,145 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 34 predicate places. [2023-08-31 00:24:12,145 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 449 flow [2023-08-31 00:24:12,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 266.92857142857144) internal successors, (3737), 14 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:24:12,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:24:12,146 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:24:12,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 00:24:12,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 00:24:12,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:24:12,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:24:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2137853694, now seen corresponding path program 1 times [2023-08-31 00:24:12,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:24:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35803530] [2023-08-31 00:24:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:24:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:24:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:24:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-31 00:24:12,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:24:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35803530] [2023-08-31 00:24:12,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35803530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:24:12,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737165566] [2023-08-31 00:24:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:24:12,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:24:12,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:24:12,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:24:12,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 00:24:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:24:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 00:24:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:24:12,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:24:12,734 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:24:12,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:24:12,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:24:12,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:24:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-31 00:24:12,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:24:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-31 00:24:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737165566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:24:25,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:24:25,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-31 00:24:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168153677] [2023-08-31 00:24:25,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:24:25,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 00:24:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:24:25,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 00:24:25,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=93, Unknown=4, NotChecked=0, Total=132 [2023-08-31 00:24:27,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:29,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:31,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:33,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:35,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:37,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:39,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:41,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:43,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:45,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:47,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:49,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:51,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:53,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:55,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:57,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:24:59,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:01,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:03,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:05,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:07,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:09,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:11,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:13,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:15,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:17,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:19,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:21,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:23,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:25,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:27,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:25:27,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 593 [2023-08-31 00:25:27,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 449 flow. Second operand has 12 states, 12 states have (on average 226.91666666666666) internal successors, (2723), 12 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:25:27,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:25:27,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 593 [2023-08-31 00:25:27,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:14,470 INFO L130 PetriNetUnfolder]: 488169/671740 cut-off events. [2023-08-31 00:26:14,470 INFO L131 PetriNetUnfolder]: For 148019/148019 co-relation queries the response was YES. [2023-08-31 00:26:16,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444980 conditions, 671740 events. 488169/671740 cut-off events. For 148019/148019 co-relation queries the response was YES. Maximal size of possible extension queue 14376. Compared 5297551 event pairs, 64940 based on Foata normal form. 0/579109 useless extension candidates. Maximal degree in co-relation 1444906. Up to 420651 conditions per place. [2023-08-31 00:26:19,189 INFO L137 encePairwiseOnDemand]: 579/593 looper letters, 303 selfloop transitions, 37 changer transitions 0/356 dead transitions. [2023-08-31 00:26:19,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 356 transitions, 1760 flow [2023-08-31 00:26:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 00:26:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 00:26:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1880 transitions. [2023-08-31 00:26:19,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45290291496025054 [2023-08-31 00:26:19,193 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1880 transitions. [2023-08-31 00:26:19,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1880 transitions. [2023-08-31 00:26:19,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:19,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1880 transitions. [2023-08-31 00:26:19,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 268.57142857142856) internal successors, (1880), 7 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:19,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 593.0) internal successors, (4744), 8 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:19,202 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 593.0) internal successors, (4744), 8 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:19,203 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 449 flow. Second operand 7 states and 1880 transitions. [2023-08-31 00:26:19,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 356 transitions, 1760 flow [2023-08-31 00:26:26,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 356 transitions, 1683 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-31 00:26:26,334 INFO L231 Difference]: Finished difference. Result has 128 places, 146 transitions, 633 flow [2023-08-31 00:26:26,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=633, PETRI_PLACES=128, PETRI_TRANSITIONS=146} [2023-08-31 00:26:26,336 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 36 predicate places. [2023-08-31 00:26:26,336 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 146 transitions, 633 flow [2023-08-31 00:26:26,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 226.91666666666666) internal successors, (2723), 12 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:26,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:26,337 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:26,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 00:26:26,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 00:26:26,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:26:26,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash 492314071, now seen corresponding path program 1 times [2023-08-31 00:26:26,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:26,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282846878] [2023-08-31 00:26:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:26,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:26:26,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282846878] [2023-08-31 00:26:26,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282846878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:26:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366275580] [2023-08-31 00:26:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:26,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:26,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:26,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:26:26,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 00:26:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 00:26:26,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:26:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:26:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:26:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:26:26,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366275580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:26:26,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:26:26,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-31 00:26:26,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258159702] [2023-08-31 00:26:26,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:26:26,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 00:26:26,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:26,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 00:26:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-31 00:26:26,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 593 [2023-08-31 00:26:26,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 146 transitions, 633 flow. Second operand has 9 states, 9 states have (on average 270.8888888888889) internal successors, (2438), 9 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:26,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:26,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 593 [2023-08-31 00:26:26,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:35,536 INFO L130 PetriNetUnfolder]: 62805/93179 cut-off events. [2023-08-31 00:26:35,536 INFO L131 PetriNetUnfolder]: For 81852/81854 co-relation queries the response was YES. [2023-08-31 00:26:35,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251150 conditions, 93179 events. 62805/93179 cut-off events. For 81852/81854 co-relation queries the response was YES. Maximal size of possible extension queue 2475. Compared 710047 event pairs, 1386 based on Foata normal form. 7580/93552 useless extension candidates. Maximal degree in co-relation 241125. Up to 58758 conditions per place. [2023-08-31 00:26:36,092 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 212 selfloop transitions, 4 changer transitions 0/229 dead transitions. [2023-08-31 00:26:36,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 229 transitions, 1319 flow [2023-08-31 00:26:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:26:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:26:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1770 transitions. [2023-08-31 00:26:36,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4974704890387858 [2023-08-31 00:26:36,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1770 transitions. [2023-08-31 00:26:36,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1770 transitions. [2023-08-31 00:26:36,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:36,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1770 transitions. [2023-08-31 00:26:36,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:36,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:36,101 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:36,101 INFO L175 Difference]: Start difference. First operand has 128 places, 146 transitions, 633 flow. Second operand 6 states and 1770 transitions. [2023-08-31 00:26:36,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 229 transitions, 1319 flow [2023-08-31 00:26:36,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 1267 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-31 00:26:36,276 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 366 flow [2023-08-31 00:26:36,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-08-31 00:26:36,277 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2023-08-31 00:26:36,277 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 366 flow [2023-08-31 00:26:36,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 270.8888888888889) internal successors, (2438), 9 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:36,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:36,278 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:36,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 00:26:36,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 00:26:36,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-31 00:26:36,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash -560863701, now seen corresponding path program 1 times [2023-08-31 00:26:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:36,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868560713] [2023-08-31 00:26:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:36,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:26:36,497 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:26:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:26:36,513 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:26:36,514 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:26:36,514 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-31 00:26:36,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-31 00:26:36,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-31 00:26:36,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-31 00:26:36,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-31 00:26:36,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-31 00:26:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 00:26:36,515 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:36,516 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:26:36,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:26:36,544 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:26:36,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 405 transitions, 854 flow [2023-08-31 00:26:36,674 INFO L130 PetriNetUnfolder]: 170/927 cut-off events. [2023-08-31 00:26:36,674 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:26:36,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 927 events. 170/927 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4716 event pairs, 6 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 676. Up to 32 conditions per place. [2023-08-31 00:26:36,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 405 transitions, 854 flow [2023-08-31 00:26:36,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 405 transitions, 854 flow [2023-08-31 00:26:36,701 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:26:36,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 405 transitions, 854 flow [2023-08-31 00:26:36,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 405 transitions, 854 flow [2023-08-31 00:26:36,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 405 transitions, 854 flow [2023-08-31 00:26:36,952 INFO L130 PetriNetUnfolder]: 170/927 cut-off events. [2023-08-31 00:26:36,953 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:26:36,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 927 events. 170/927 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4716 event pairs, 6 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 676. Up to 32 conditions per place. [2023-08-31 00:26:37,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 109848 [2023-08-31 00:26:40,355 INFO L134 LiptonReduction]: Checked pairs total: 192210 [2023-08-31 00:26:40,355 INFO L136 LiptonReduction]: Total number of compositions: 310 [2023-08-31 00:26:40,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:26:40,356 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e2b00c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:26:40,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 00:26:40,358 INFO L130 PetriNetUnfolder]: 9/29 cut-off events. [2023-08-31 00:26:40,358 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:26:40,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:40,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:40,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-31 00:26:40,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1092444618, now seen corresponding path program 1 times [2023-08-31 00:26:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:40,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891612956] [2023-08-31 00:26:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:26:40,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:40,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891612956] [2023-08-31 00:26:40,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891612956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:26:40,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:26:40,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:26:40,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404308490] [2023-08-31 00:26:40,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:26:40,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:26:40,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:40,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:26:40,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:26:40,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 715 [2023-08-31 00:26:40,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 172 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 00:26:40,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:40,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 715 [2023-08-31 00:26:40,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand