./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c --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/weaver/parallel-misc-3-extended.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --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 01:55:24,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:55:24,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:55:24,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:55:24,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:55:24,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:55:24,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:55:24,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:55:24,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:55:24,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:55:24,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:55:24,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:55:24,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:55:24,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:55:24,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:55:24,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:55:24,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:55:24,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:55:24,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:55:24,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:55:24,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:55:24,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:55:24,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:55:24,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:55:24,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:55:24,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:55:24,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:55:24,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:55:24,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:55:24,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:55:24,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:55:24,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:55:24,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:55:24,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:55:24,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:55:24,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:55:24,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:55:24,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:55:24,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:55:24,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:55:24,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:55:24,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:55:24,310 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:55:24,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:55:24,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:55:24,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:55:24,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:55:24,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:55:24,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:55:24,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:55:24,313 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:55:24,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:55:24,314 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:55:24,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:55:24,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:55:24,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:55:24,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:55:24,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:55:24,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:55:24,316 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:55:24,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:55:24,316 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:55:24,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:55:24,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:55:24,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:55:24,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:55:24,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:55:24,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:55:24,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:55:24,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:55:24,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:55:24,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:55:24,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:55:24,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:55:24,319 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:55:24,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:55:24,319 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:55:24,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:55:24,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:55:24,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:55:24,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:55:24,638 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:55:24,639 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:55:24,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-31 01:55:25,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:55:26,003 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:55:26,003 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-31 01:55:26,019 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59af961b9/e9c329ab1fe24996af162692a8a3cb5b/FLAGf4b944587 [2023-08-31 01:55:26,033 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59af961b9/e9c329ab1fe24996af162692a8a3cb5b [2023-08-31 01:55:26,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:55:26,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:55:26,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:55:26,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:55:26,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:55:26,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68eb3c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26, skipping insertion in model container [2023-08-31 01:55:26,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:55:26,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:55:26,228 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-31 01:55:26,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:55:26,238 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:55:26,255 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-31 01:55:26,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:55:26,263 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:55:26,263 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:55:26,268 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:55:26,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26 WrapperNode [2023-08-31 01:55:26,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:55:26,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:55:26,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:55:26,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:55:26,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,295 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-08-31 01:55:26,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:55:26,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:55:26,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:55:26,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:55:26,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,314 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:55:26,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:55:26,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:55:26,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:55:26,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (1/1) ... [2023-08-31 01:55:26,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:55:26,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:26,347 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 01:55:26,358 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 01:55:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:55:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:55:26,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:55:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:55:26,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:55:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:55:26,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:55:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:55:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:55:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:55:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 01:55:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 01:55:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:55:26,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:55:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:55:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:55:26,390 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 01:55:26,494 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:55:26,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:55:26,770 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:55:26,797 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:55:26,799 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 01:55:26,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:55:26 BoogieIcfgContainer [2023-08-31 01:55:26,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:55:26,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:55:26,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:55:26,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:55:26,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:55:26" (1/3) ... [2023-08-31 01:55:26,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c289668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:55:26, skipping insertion in model container [2023-08-31 01:55:26,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:55:26" (2/3) ... [2023-08-31 01:55:26,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c289668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:55:26, skipping insertion in model container [2023-08-31 01:55:26,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:55:26" (3/3) ... [2023-08-31 01:55:26,809 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-08-31 01:55:26,816 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:55:26,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:55:26,824 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:55:26,824 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:55:26,930 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:55:26,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 278 flow [2023-08-31 01:55:27,053 INFO L130 PetriNetUnfolder]: 16/124 cut-off events. [2023-08-31 01:55:27,054 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:55:27,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 124 events. 16/124 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-31 01:55:27,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 127 transitions, 278 flow [2023-08-31 01:55:27,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 246 flow [2023-08-31 01:55:27,071 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:55:27,089 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 246 flow [2023-08-31 01:55:27,092 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 246 flow [2023-08-31 01:55:27,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-08-31 01:55:27,133 INFO L130 PetriNetUnfolder]: 16/114 cut-off events. [2023-08-31 01:55:27,133 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:55:27,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 114 events. 16/114 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-31 01:55:27,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 3240 [2023-08-31 01:55:30,699 INFO L134 LiptonReduction]: Checked pairs total: 3005 [2023-08-31 01:55:30,699 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-08-31 01:55:30,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:55:30,716 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;@58b9a573, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:55:30,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:55:30,722 INFO L130 PetriNetUnfolder]: 3/18 cut-off events. [2023-08-31 01:55:30,722 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:55:30,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:30,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:30,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:30,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash -135806213, now seen corresponding path program 1 times [2023-08-31 01:55:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:30,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106029475] [2023-08-31 01:55:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:31,090 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 01:55:31,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106029475] [2023-08-31 01:55:31,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106029475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:31,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:31,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:55:31,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838039145] [2023-08-31 01:55:31,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:31,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:55:31,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:55:31,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:55:31,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 240 [2023-08-31 01:55:31,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 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 01:55:31,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:31,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 240 [2023-08-31 01:55:31,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:31,221 INFO L130 PetriNetUnfolder]: 111/168 cut-off events. [2023-08-31 01:55:31,221 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-31 01:55:31,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 168 events. 111/168 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 334 event pairs, 17 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 244. Up to 105 conditions per place. [2023-08-31 01:55:31,225 INFO L137 encePairwiseOnDemand]: 237/240 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-31 01:55:31,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 140 flow [2023-08-31 01:55:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:55:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:55:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-31 01:55:31,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-31 01:55:31,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:31,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 01:55:31,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:55:31,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:55:31,251 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 56 flow. Second operand 3 states and 360 transitions. [2023-08-31 01:55:31,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 140 flow [2023-08-31 01:55:31,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:55:31,266 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2023-08-31 01:55:31,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2023-08-31 01:55:31,299 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-08-31 01:55:31,299 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2023-08-31 01:55:31,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 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 01:55:31,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:31,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:31,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:55:31,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:31,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1305020753, now seen corresponding path program 1 times [2023-08-31 01:55:31,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:31,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004953522] [2023-08-31 01:55:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:31,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:31,430 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 01:55:31,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:31,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004953522] [2023-08-31 01:55:31,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004953522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:31,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:31,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:55:31,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186931312] [2023-08-31 01:55:31,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:31,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:55:31,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:31,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:55:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:55:31,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 240 [2023-08-31 01:55:31,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 01:55:31,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:31,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 240 [2023-08-31 01:55:31,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:31,499 INFO L130 PetriNetUnfolder]: 151/226 cut-off events. [2023-08-31 01:55:31,499 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-31 01:55:31,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 226 events. 151/226 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 549 event pairs, 11 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 188. Up to 185 conditions per place. [2023-08-31 01:55:31,501 INFO L137 encePairwiseOnDemand]: 237/240 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-31 01:55:31,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 149 flow [2023-08-31 01:55:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:55:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:55:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-31 01:55:31,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-31 01:55:31,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:31,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 01:55:31,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:55:31,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:55:31,508 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 3 states and 360 transitions. [2023-08-31 01:55:31,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 149 flow [2023-08-31 01:55:31,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:55:31,510 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 66 flow [2023-08-31 01:55:31,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-31 01:55:31,511 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-08-31 01:55:31,511 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 66 flow [2023-08-31 01:55:31,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 01:55:31,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:31,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:31,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:55:31,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:31,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1756026437, now seen corresponding path program 1 times [2023-08-31 01:55:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:31,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113320391] [2023-08-31 01:55:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:31,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:55:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113320391] [2023-08-31 01:55:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113320391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:55:31,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:55:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:55:31,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121123199] [2023-08-31 01:55:31,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:55:31,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:55:31,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:55:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:55:31,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 240 [2023-08-31 01:55:31,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 01:55:31,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:31,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 240 [2023-08-31 01:55:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:31,701 INFO L130 PetriNetUnfolder]: 220/325 cut-off events. [2023-08-31 01:55:31,701 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-08-31 01:55:31,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 325 events. 220/325 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 867 event pairs, 28 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 596. Up to 243 conditions per place. [2023-08-31 01:55:31,704 INFO L137 encePairwiseOnDemand]: 237/240 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-31 01:55:31,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 171 flow [2023-08-31 01:55:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:55:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:55:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-31 01:55:31,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-31 01:55:31,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:31,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-31 01:55:31,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 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 01:55:31,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:55:31,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:55:31,711 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 66 flow. Second operand 3 states and 360 transitions. [2023-08-31 01:55:31,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 171 flow [2023-08-31 01:55:31,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:55:31,713 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 76 flow [2023-08-31 01:55:31,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-31 01:55:31,714 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-31 01:55:31,714 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 76 flow [2023-08-31 01:55:31,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 01:55:31,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:31,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:31,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:55:31,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:31,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash -170860382, now seen corresponding path program 1 times [2023-08-31 01:55:31,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:31,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639112731] [2023-08-31 01:55:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:31,961 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 01:55:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639112731] [2023-08-31 01:55:31,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639112731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:31,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991072005] [2023-08-31 01:55:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:31,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:31,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:31,969 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 01:55:31,975 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 01:55:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 01:55:32,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:32,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:55:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:55:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991072005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:55:33,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:55:33,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 4] total 10 [2023-08-31 01:55:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791571215] [2023-08-31 01:55:33,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:55:33,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:55:33,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:33,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:55:33,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:55:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 240 [2023-08-31 01:55:33,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 76 flow. Second operand has 11 states, 11 states have (on average 91.45454545454545) internal successors, (1006), 11 states have internal predecessors, (1006), 0 states have call successors, (0), 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 01:55:33,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:33,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 240 [2023-08-31 01:55:33,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:33,418 INFO L130 PetriNetUnfolder]: 397/582 cut-off events. [2023-08-31 01:55:33,419 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2023-08-31 01:55:33,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 582 events. 397/582 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1756 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 489. Up to 177 conditions per place. [2023-08-31 01:55:33,423 INFO L137 encePairwiseOnDemand]: 234/240 looper letters, 116 selfloop transitions, 29 changer transitions 0/145 dead transitions. [2023-08-31 01:55:33,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 145 transitions, 772 flow [2023-08-31 01:55:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:55:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:55:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1621 transitions. [2023-08-31 01:55:33,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973039215686274 [2023-08-31 01:55:33,428 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1621 transitions. [2023-08-31 01:55:33,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1621 transitions. [2023-08-31 01:55:33,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:33,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1621 transitions. [2023-08-31 01:55:33,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 95.3529411764706) internal successors, (1621), 17 states have internal predecessors, (1621), 0 states have call successors, (0), 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 01:55:33,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 240.0) internal successors, (4320), 18 states have internal predecessors, (4320), 0 states have call successors, (0), 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 01:55:33,440 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 240.0) internal successors, (4320), 18 states have internal predecessors, (4320), 0 states have call successors, (0), 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 01:55:33,440 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 76 flow. Second operand 17 states and 1621 transitions. [2023-08-31 01:55:33,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 145 transitions, 772 flow [2023-08-31 01:55:33,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 145 transitions, 766 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:55:33,444 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 319 flow [2023-08-31 01:55:33,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=319, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2023-08-31 01:55:33,445 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 24 predicate places. [2023-08-31 01:55:33,445 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 319 flow [2023-08-31 01:55:33,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 91.45454545454545) internal successors, (1006), 11 states have internal predecessors, (1006), 0 states have call successors, (0), 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 01:55:33,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:33,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:33,455 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 01:55:33,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:33,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:33,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1244112525, now seen corresponding path program 2 times [2023-08-31 01:55:33,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:33,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393301113] [2023-08-31 01:55:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:33,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:55:33,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393301113] [2023-08-31 01:55:33,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393301113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458843061] [2023-08-31 01:55:33,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:55:33,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:33,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:33,935 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 01:55:33,960 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 01:55:34,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:55:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:55:34,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 01:55:34,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:55:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:55:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458843061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:55:34,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:55:34,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 8 [2023-08-31 01:55:34,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395072432] [2023-08-31 01:55:34,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:55:34,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:55:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:55:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:55:34,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 240 [2023-08-31 01:55:34,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 319 flow. Second operand has 9 states, 9 states have (on average 101.88888888888889) internal successors, (917), 9 states have internal predecessors, (917), 0 states have call successors, (0), 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 01:55:34,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:34,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 240 [2023-08-31 01:55:34,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:34,726 INFO L130 PetriNetUnfolder]: 503/734 cut-off events. [2023-08-31 01:55:34,726 INFO L131 PetriNetUnfolder]: For 1625/1625 co-relation queries the response was YES. [2023-08-31 01:55:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 734 events. 503/734 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2366 event pairs, 9 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 2162. Up to 223 conditions per place. [2023-08-31 01:55:34,732 INFO L137 encePairwiseOnDemand]: 235/240 looper letters, 148 selfloop transitions, 30 changer transitions 0/178 dead transitions. [2023-08-31 01:55:34,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 178 transitions, 1451 flow [2023-08-31 01:55:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:55:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:55:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1048 transitions. [2023-08-31 01:55:34,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43666666666666665 [2023-08-31 01:55:34,735 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1048 transitions. [2023-08-31 01:55:34,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1048 transitions. [2023-08-31 01:55:34,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:34,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1048 transitions. [2023-08-31 01:55:34,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 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 01:55:34,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 240.0) internal successors, (2640), 11 states have internal predecessors, (2640), 0 states have call successors, (0), 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 01:55:34,742 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 240.0) internal successors, (2640), 11 states have internal predecessors, (2640), 0 states have call successors, (0), 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 01:55:34,742 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 319 flow. Second operand 10 states and 1048 transitions. [2023-08-31 01:55:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 178 transitions, 1451 flow [2023-08-31 01:55:34,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 178 transitions, 1116 flow, removed 143 selfloop flow, removed 3 redundant places. [2023-08-31 01:55:34,753 INFO L231 Difference]: Finished difference. Result has 61 places, 75 transitions, 511 flow [2023-08-31 01:55:34,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=511, PETRI_PLACES=61, PETRI_TRANSITIONS=75} [2023-08-31 01:55:34,754 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-31 01:55:34,754 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 75 transitions, 511 flow [2023-08-31 01:55:34,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 101.88888888888889) internal successors, (917), 9 states have internal predecessors, (917), 0 states have call successors, (0), 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 01:55:34,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:34,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:34,763 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 01:55:34,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:34,961 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:34,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1158182375, now seen corresponding path program 3 times [2023-08-31 01:55:34,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:34,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989553297] [2023-08-31 01:55:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:34,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:35,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989553297] [2023-08-31 01:55:35,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989553297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930122509] [2023-08-31 01:55:35,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:55:35,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:35,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:35,984 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 01:55:36,009 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 01:55:36,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:55:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 01:55:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:36,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:55:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:55:37,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930122509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:55:37,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:55:37,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 20 [2023-08-31 01:55:37,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567448653] [2023-08-31 01:55:37,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:55:37,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 01:55:37,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:37,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 01:55:37,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-08-31 01:55:38,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 240 [2023-08-31 01:55:38,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 75 transitions, 511 flow. Second operand has 22 states, 22 states have (on average 77.81818181818181) internal successors, (1712), 22 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:55:38,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:38,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 240 [2023-08-31 01:55:38,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:40,716 INFO L130 PetriNetUnfolder]: 2467/3512 cut-off events. [2023-08-31 01:55:40,717 INFO L131 PetriNetUnfolder]: For 12642/12642 co-relation queries the response was YES. [2023-08-31 01:55:40,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13933 conditions, 3512 events. 2467/3512 cut-off events. For 12642/12642 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15114 event pairs, 18 based on Foata normal form. 32/3210 useless extension candidates. Maximal degree in co-relation 12410. Up to 801 conditions per place. [2023-08-31 01:55:40,744 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 224 selfloop transitions, 410 changer transitions 24/658 dead transitions. [2023-08-31 01:55:40,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 658 transitions, 5364 flow [2023-08-31 01:55:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 01:55:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 01:55:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3041 transitions. [2023-08-31 01:55:40,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519675925925926 [2023-08-31 01:55:40,755 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3041 transitions. [2023-08-31 01:55:40,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3041 transitions. [2023-08-31 01:55:40,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:40,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3041 transitions. [2023-08-31 01:55:40,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 84.47222222222223) internal successors, (3041), 36 states have internal predecessors, (3041), 0 states have call successors, (0), 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 01:55:40,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 240.0) internal successors, (8880), 37 states have internal predecessors, (8880), 0 states have call successors, (0), 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 01:55:40,776 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 240.0) internal successors, (8880), 37 states have internal predecessors, (8880), 0 states have call successors, (0), 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 01:55:40,776 INFO L175 Difference]: Start difference. First operand has 61 places, 75 transitions, 511 flow. Second operand 36 states and 3041 transitions. [2023-08-31 01:55:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 658 transitions, 5364 flow [2023-08-31 01:55:40,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 658 transitions, 4976 flow, removed 183 selfloop flow, removed 1 redundant places. [2023-08-31 01:55:40,863 INFO L231 Difference]: Finished difference. Result has 107 places, 472 transitions, 4389 flow [2023-08-31 01:55:40,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4389, PETRI_PLACES=107, PETRI_TRANSITIONS=472} [2023-08-31 01:55:40,864 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 81 predicate places. [2023-08-31 01:55:40,865 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 472 transitions, 4389 flow [2023-08-31 01:55:40,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.81818181818181) internal successors, (1712), 22 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:55:40,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:40,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:40,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 01:55:41,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:41,072 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:41,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1565513747, now seen corresponding path program 4 times [2023-08-31 01:55:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:41,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772132384] [2023-08-31 01:55:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:42,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772132384] [2023-08-31 01:55:42,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772132384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365832379] [2023-08-31 01:55:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:55:42,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:42,135 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 01:55:42,159 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 01:55:42,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:55:42,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:42,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 01:55:42,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:42,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:55:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 01:55:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365832379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:55:43,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:55:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-31 01:55:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967747798] [2023-08-31 01:55:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:55:43,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:55:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:43,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:55:43,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:55:43,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 240 [2023-08-31 01:55:43,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 472 transitions, 4389 flow. Second operand has 24 states, 24 states have (on average 76.58333333333333) internal successors, (1838), 24 states have internal predecessors, (1838), 0 states have call successors, (0), 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 01:55:43,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:43,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 240 [2023-08-31 01:55:43,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:55:47,701 INFO L130 PetriNetUnfolder]: 6206/8902 cut-off events. [2023-08-31 01:55:47,701 INFO L131 PetriNetUnfolder]: For 40470/40470 co-relation queries the response was YES. [2023-08-31 01:55:47,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42649 conditions, 8902 events. 6206/8902 cut-off events. For 40470/40470 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 46320 event pairs, 26 based on Foata normal form. 54/8540 useless extension candidates. Maximal degree in co-relation 41148. Up to 2127 conditions per place. [2023-08-31 01:55:47,769 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 500 selfloop transitions, 1094 changer transitions 63/1657 dead transitions. [2023-08-31 01:55:47,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1657 transitions, 17162 flow [2023-08-31 01:55:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-31 01:55:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-31 01:55:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3928 transitions. [2023-08-31 01:55:47,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34822695035460993 [2023-08-31 01:55:47,779 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3928 transitions. [2023-08-31 01:55:47,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3928 transitions. [2023-08-31 01:55:47,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:55:47,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3928 transitions. [2023-08-31 01:55:47,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 83.57446808510639) internal successors, (3928), 47 states have internal predecessors, (3928), 0 states have call successors, (0), 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 01:55:47,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 240.0) internal successors, (11520), 48 states have internal predecessors, (11520), 0 states have call successors, (0), 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 01:55:47,803 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 240.0) internal successors, (11520), 48 states have internal predecessors, (11520), 0 states have call successors, (0), 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 01:55:47,803 INFO L175 Difference]: Start difference. First operand has 107 places, 472 transitions, 4389 flow. Second operand 47 states and 3928 transitions. [2023-08-31 01:55:47,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1657 transitions, 17162 flow [2023-08-31 01:55:48,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 1657 transitions, 15778 flow, removed 690 selfloop flow, removed 1 redundant places. [2023-08-31 01:55:48,476 INFO L231 Difference]: Finished difference. Result has 172 places, 1354 transitions, 15630 flow [2023-08-31 01:55:48,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=3817, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15630, PETRI_PLACES=172, PETRI_TRANSITIONS=1354} [2023-08-31 01:55:48,477 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 146 predicate places. [2023-08-31 01:55:48,477 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 1354 transitions, 15630 flow [2023-08-31 01:55:48,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.58333333333333) internal successors, (1838), 24 states have internal predecessors, (1838), 0 states have call successors, (0), 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 01:55:48,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:55:48,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:55:48,488 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 01:55:48,685 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 01:55:48,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:55:48,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:55:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1531481615, now seen corresponding path program 5 times [2023-08-31 01:55:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:55:48,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624423611] [2023-08-31 01:55:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:55:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:55:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:55:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:55:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624423611] [2023-08-31 01:55:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624423611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:55:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389134620] [2023-08-31 01:55:50,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:55:50,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:55:50,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:55:50,077 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 01:55:50,080 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 01:55:50,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:55:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:55:50,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 01:55:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:55:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:55:50,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:55:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:55:51,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389134620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:55:51,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:55:51,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 24 [2023-08-31 01:55:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21447754] [2023-08-31 01:55:51,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:55:51,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 01:55:51,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:55:51,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 01:55:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-08-31 01:55:51,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 240 [2023-08-31 01:55:51,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 1354 transitions, 15630 flow. Second operand has 26 states, 26 states have (on average 73.26923076923077) internal successors, (1905), 26 states have internal predecessors, (1905), 0 states have call successors, (0), 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 01:55:51,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:55:51,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 240 [2023-08-31 01:55:51,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:02,847 INFO L130 PetriNetUnfolder]: 17734/24832 cut-off events. [2023-08-31 01:56:02,847 INFO L131 PetriNetUnfolder]: For 146156/146156 co-relation queries the response was YES. [2023-08-31 01:56:02,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148649 conditions, 24832 events. 17734/24832 cut-off events. For 146156/146156 co-relation queries the response was YES. Maximal size of possible extension queue 1176. Compared 143648 event pairs, 28 based on Foata normal form. 57/24713 useless extension candidates. Maximal degree in co-relation 145971. Up to 7423 conditions per place. [2023-08-31 01:56:03,108 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 1184 selfloop transitions, 3774 changer transitions 43/5001 dead transitions. [2023-08-31 01:56:03,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 5001 transitions, 66210 flow [2023-08-31 01:56:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-31 01:56:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-31 01:56:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 7112 transitions. [2023-08-31 01:56:03,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33295880149812734 [2023-08-31 01:56:03,122 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 7112 transitions. [2023-08-31 01:56:03,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 7112 transitions. [2023-08-31 01:56:03,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:03,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 7112 transitions. [2023-08-31 01:56:03,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 79.91011235955057) internal successors, (7112), 89 states have internal predecessors, (7112), 0 states have call successors, (0), 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 01:56:03,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 240.0) internal successors, (21600), 90 states have internal predecessors, (21600), 0 states have call successors, (0), 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 01:56:03,181 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 240.0) internal successors, (21600), 90 states have internal predecessors, (21600), 0 states have call successors, (0), 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 01:56:03,181 INFO L175 Difference]: Start difference. First operand has 172 places, 1354 transitions, 15630 flow. Second operand 89 states and 7112 transitions. [2023-08-31 01:56:03,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 5001 transitions, 66210 flow [2023-08-31 01:56:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 5001 transitions, 63967 flow, removed 1112 selfloop flow, removed 2 redundant places. [2023-08-31 01:56:12,272 INFO L231 Difference]: Finished difference. Result has 293 places, 4504 transitions, 66708 flow [2023-08-31 01:56:12,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=15061, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=66708, PETRI_PLACES=293, PETRI_TRANSITIONS=4504} [2023-08-31 01:56:12,274 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 267 predicate places. [2023-08-31 01:56:12,274 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 4504 transitions, 66708 flow [2023-08-31 01:56:12,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 73.26923076923077) internal successors, (1905), 26 states have internal predecessors, (1905), 0 states have call successors, (0), 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 01:56:12,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:12,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:12,282 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 01:56:12,481 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 01:56:12,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:12,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1711291265, now seen corresponding path program 6 times [2023-08-31 01:56:12,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:12,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917361231] [2023-08-31 01:56:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:12,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:13,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917361231] [2023-08-31 01:56:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917361231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822420720] [2023-08-31 01:56:13,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:56:13,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:13,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:13,733 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 01:56:13,735 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 01:56:13,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:56:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:13,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 01:56:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:14,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:56:15,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822420720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:15,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:15,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-08-31 01:56:15,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274978655] [2023-08-31 01:56:15,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:15,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:56:15,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:15,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:56:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:56:15,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 240 [2023-08-31 01:56:15,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 4504 transitions, 66708 flow. Second operand has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 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 01:56:15,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:15,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 240 [2023-08-31 01:56:15,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:42,896 INFO L130 PetriNetUnfolder]: 30522/43870 cut-off events. [2023-08-31 01:56:42,897 INFO L131 PetriNetUnfolder]: For 400834/400834 co-relation queries the response was YES. [2023-08-31 01:56:43,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313607 conditions, 43870 events. 30522/43870 cut-off events. For 400834/400834 co-relation queries the response was YES. Maximal size of possible extension queue 2154. Compared 290556 event pairs, 82 based on Foata normal form. 68/43938 useless extension candidates. Maximal degree in co-relation 312221. Up to 13621 conditions per place. [2023-08-31 01:56:43,932 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 2759 selfloop transitions, 6119 changer transitions 90/8968 dead transitions. [2023-08-31 01:56:43,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 8968 transitions, 147419 flow [2023-08-31 01:56:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-31 01:56:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-31 01:56:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 6789 transitions. [2023-08-31 01:56:43,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408132530120482 [2023-08-31 01:56:43,941 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 6789 transitions. [2023-08-31 01:56:43,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 6789 transitions. [2023-08-31 01:56:43,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:43,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 6789 transitions. [2023-08-31 01:56:43,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 81.79518072289157) internal successors, (6789), 83 states have internal predecessors, (6789), 0 states have call successors, (0), 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 01:56:43,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 240.0) internal successors, (20160), 84 states have internal predecessors, (20160), 0 states have call successors, (0), 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 01:56:43,971 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 240.0) internal successors, (20160), 84 states have internal predecessors, (20160), 0 states have call successors, (0), 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 01:56:43,971 INFO L175 Difference]: Start difference. First operand has 293 places, 4504 transitions, 66708 flow. Second operand 83 states and 6789 transitions. [2023-08-31 01:56:43,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 8968 transitions, 147419 flow [2023-08-31 01:57:46,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 8968 transitions, 140951 flow, removed 3062 selfloop flow, removed 13 redundant places. [2023-08-31 01:57:46,686 INFO L231 Difference]: Finished difference. Result has 399 places, 7918 transitions, 138546 flow [2023-08-31 01:57:46,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=63804, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3098, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=138546, PETRI_PLACES=399, PETRI_TRANSITIONS=7918} [2023-08-31 01:57:46,690 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 373 predicate places. [2023-08-31 01:57:46,690 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 7918 transitions, 138546 flow [2023-08-31 01:57:46,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 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 01:57:46,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:46,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:46,699 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 01:57:46,898 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 01:57:46,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:46,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1401432863, now seen corresponding path program 7 times [2023-08-31 01:57:46,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:46,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652275324] [2023-08-31 01:57:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:46,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:47,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652275324] [2023-08-31 01:57:47,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652275324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526583812] [2023-08-31 01:57:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:57:47,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:47,704 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 01:57:47,710 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 01:57:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 01:57:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:48,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526583812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:48,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-31 01:57:48,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046287225] [2023-08-31 01:57:48,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:48,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 01:57:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:48,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 01:57:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-08-31 01:57:49,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 240 [2023-08-31 01:57:49,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 7918 transitions, 138546 flow. Second operand has 24 states, 24 states have (on average 76.16666666666667) internal successors, (1828), 24 states have internal predecessors, (1828), 0 states have call successors, (0), 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 01:57:49,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:49,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 240 [2023-08-31 01:57:49,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:17,195 INFO L130 PetriNetUnfolder]: 55768/80973 cut-off events. [2023-08-31 01:59:17,195 INFO L131 PetriNetUnfolder]: For 912151/912151 co-relation queries the response was YES. [2023-08-31 01:59:19,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660732 conditions, 80973 events. 55768/80973 cut-off events. For 912151/912151 co-relation queries the response was YES. Maximal size of possible extension queue 3859. Compared 591688 event pairs, 148 based on Foata normal form. 188/81161 useless extension candidates. Maximal degree in co-relation 658230. Up to 23873 conditions per place. [2023-08-31 01:59:20,186 INFO L137 encePairwiseOnDemand]: 232/240 looper letters, 4311 selfloop transitions, 11241 changer transitions 238/15790 dead transitions. [2023-08-31 01:59:20,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 15790 transitions, 304628 flow [2023-08-31 01:59:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-31 01:59:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-31 01:59:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 7067 transitions. [2023-08-31 01:59:20,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3423934108527132 [2023-08-31 01:59:20,197 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 7067 transitions. [2023-08-31 01:59:20,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 7067 transitions. [2023-08-31 01:59:20,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:59:20,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 7067 transitions. [2023-08-31 01:59:20,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 82.17441860465117) internal successors, (7067), 86 states have internal predecessors, (7067), 0 states have call successors, (0), 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 01:59:20,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 240.0) internal successors, (20880), 87 states have internal predecessors, (20880), 0 states have call successors, (0), 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 01:59:20,223 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 240.0) internal successors, (20880), 87 states have internal predecessors, (20880), 0 states have call successors, (0), 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 01:59:20,224 INFO L175 Difference]: Start difference. First operand has 399 places, 7918 transitions, 138546 flow. Second operand 86 states and 7067 transitions. [2023-08-31 01:59:20,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 15790 transitions, 304628 flow [2023-08-31 02:04:50,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 15790 transitions, 300255 flow, removed 2035 selfloop flow, removed 11 redundant places. [2023-08-31 02:04:50,362 INFO L231 Difference]: Finished difference. Result has 531 places, 14680 transitions, 302938 flow [2023-08-31 02:04:50,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=136732, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=302938, PETRI_PLACES=531, PETRI_TRANSITIONS=14680} [2023-08-31 02:04:50,369 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 505 predicate places. [2023-08-31 02:04:50,369 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 14680 transitions, 302938 flow [2023-08-31 02:04:50,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.16666666666667) internal successors, (1828), 24 states have internal predecessors, (1828), 0 states have call successors, (0), 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 02:04:50,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:04:50,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:04:50,376 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 02:04:50,575 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 02:04:50,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:04:50,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:04:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1908179027, now seen corresponding path program 8 times [2023-08-31 02:04:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:04:50,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664383086] [2023-08-31 02:04:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:04:50,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:04:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:04:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:04:51,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:04:51,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664383086] [2023-08-31 02:04:51,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664383086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:04:51,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402933427] [2023-08-31 02:04:51,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:04:51,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:04:51,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:04:51,449 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 02:04:51,451 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 02:04:51,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:04:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:04:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 02:04:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:04:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:04:51,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:04:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:04:52,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402933427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:04:52,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:04:52,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-08-31 02:04:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973298942] [2023-08-31 02:04:52,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:04:52,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:04:52,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:04:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:04:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:04:53,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 240 [2023-08-31 02:04:53,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 14680 transitions, 302938 flow. Second operand has 23 states, 23 states have (on average 77.69565217391305) internal successors, (1787), 23 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 02:04:53,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:04:53,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 240 [2023-08-31 02:04:53,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15