./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/popl20-bad-threaded-sum-2.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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:10:48,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:10:48,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:10:48,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:10:48,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:10:48,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:10:48,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:10:48,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:10:48,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:10:48,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:10:48,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:10:48,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:10:48,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:10:48,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:10:48,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:10:48,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:10:48,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:10:48,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:10:48,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:10:48,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:10:48,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:10:48,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:10:48,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:10:48,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:10:48,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:10:48,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:10:48,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:10:48,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:10:48,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:10:48,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:10:48,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:10:48,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:10:48,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:10:48,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:10:48,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:10:48,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:10:48,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:10:48,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:10:48,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:10:48,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:10:48,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:10:48,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:10:48,346 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:10:48,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:10:48,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:10:48,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:10:48,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:10:48,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:10:48,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:10:48,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:10:48,350 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:10:48,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:10:48,351 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:10:48,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:10:48,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:10:48,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:10:48,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:10:48,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:10:48,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:10:48,352 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:10:48,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:10:48,352 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:10:48,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:10:48,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:10:48,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:10:48,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:10:48,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:10:48,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:10:48,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:10:48,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:10:48,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:10:48,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:10:48,355 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:10:48,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:10:48,355 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:10:48,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:10:48,356 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:10:48,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:10:48,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:10:48,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:10:48,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:10:48,643 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:10:48,643 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:10:48,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-09-01 13:10:49,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:10:49,966 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:10:49,966 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-09-01 13:10:49,975 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b717c8f5a/e4301408a7d14764a5489d844a963700/FLAGd6bce500b [2023-09-01 13:10:49,987 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b717c8f5a/e4301408a7d14764a5489d844a963700 [2023-09-01 13:10:49,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:10:49,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:10:49,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:10:49,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:10:49,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:10:49,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:10:49" (1/1) ... [2023-09-01 13:10:49,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb36737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:49, skipping insertion in model container [2023-09-01 13:10:49,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:10:49" (1/1) ... [2023-09-01 13:10:50,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:10:50,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:10:50,139 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/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2023-09-01 13:10:50,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:10:50,151 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:10:50,168 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/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2023-09-01 13:10:50,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:10:50,176 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:10:50,176 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:10:50,182 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:10:50,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50 WrapperNode [2023-09-01 13:10:50,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:10:50,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:10:50,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:10:50,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:10:50,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,228 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-09-01 13:10:50,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:10:50,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:10:50,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:10:50,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:10:50,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:10:50,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:10:50,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:10:50,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:10:50,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (1/1) ... [2023-09-01 13:10:50,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:10:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:10:50,310 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) [2023-09-01 13:10:50,334 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 [2023-09-01 13:10:50,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:10:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:10:50,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:10:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:10:50,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:10:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:10:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:10:50,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:10:50,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:10:50,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:10:50,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:10:50,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:10:50,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:10:50,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:10:50,355 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:10:50,480 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:10:50,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:10:50,715 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:10:50,773 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:10:50,775 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 13:10:50,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:10:50 BoogieIcfgContainer [2023-09-01 13:10:50,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:10:50,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:10:50,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:10:50,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:10:50,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:10:49" (1/3) ... [2023-09-01 13:10:50,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@efff4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:10:50, skipping insertion in model container [2023-09-01 13:10:50,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:10:50" (2/3) ... [2023-09-01 13:10:50,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@efff4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:10:50, skipping insertion in model container [2023-09-01 13:10:50,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:10:50" (3/3) ... [2023-09-01 13:10:50,786 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-09-01 13:10:50,793 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:10:50,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:10:50,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:10:50,801 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:10:50,876 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 13:10:50,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 83 transitions, 182 flow [2023-09-01 13:10:50,946 INFO L130 PetriNetUnfolder]: 6/81 cut-off events. [2023-09-01 13:10:50,947 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:10:50,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 6/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 13:10:50,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 83 transitions, 182 flow [2023-09-01 13:10:50,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2023-09-01 13:10:50,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:10:50,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 73 transitions, 158 flow [2023-09-01 13:10:50,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 73 transitions, 158 flow [2023-09-01 13:10:50,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 158 flow [2023-09-01 13:10:51,008 INFO L130 PetriNetUnfolder]: 6/73 cut-off events. [2023-09-01 13:10:51,008 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:10:51,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 13:10:51,010 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2023-09-01 13:10:53,114 INFO L134 LiptonReduction]: Checked pairs total: 617 [2023-09-01 13:10:53,115 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-09-01 13:10:53,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:10:53,142 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;@513c4d2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:10:53,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 13:10:53,154 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2023-09-01 13:10:53,154 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 13:10:53,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:53,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:53,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:10:53,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1488220568, now seen corresponding path program 1 times [2023-09-01 13:10:53,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886575596] [2023-09-01 13:10:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:53,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:53,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886575596] [2023-09-01 13:10:53,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886575596] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:10:53,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:10:53,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:10:53,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135662307] [2023-09-01 13:10:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:10:53,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:10:53,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:10:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:10:53,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 148 [2023-09-01 13:10:53,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:53,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:53,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 148 [2023-09-01 13:10:53,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:53,877 INFO L130 PetriNetUnfolder]: 72/130 cut-off events. [2023-09-01 13:10:53,877 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 13:10:53,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 130 events. 72/130 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 368 event pairs, 11 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 207. Up to 100 conditions per place. [2023-09-01 13:10:53,880 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 24 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-09-01 13:10:53,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 141 flow [2023-09-01 13:10:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:10:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:10:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 286 transitions. [2023-09-01 13:10:53,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831081081081081 [2023-09-01 13:10:53,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 286 transitions. [2023-09-01 13:10:53,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 286 transitions. [2023-09-01 13:10:53,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:53,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 286 transitions. [2023-09-01 13:10:53,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:53,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:53,919 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:53,921 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 4 states and 286 transitions. [2023-09-01 13:10:53,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 141 flow [2023-09-01 13:10:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:10:53,925 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 70 flow [2023-09-01 13:10:53,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-09-01 13:10:53,929 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-09-01 13:10:53,930 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 70 flow [2023-09-01 13:10:53,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:53,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:53,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:53,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:10:53,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:10:53,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash 258564523, now seen corresponding path program 1 times [2023-09-01 13:10:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:53,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685725581] [2023-09-01 13:10:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:53,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:54,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:54,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685725581] [2023-09-01 13:10:54,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685725581] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:10:54,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790499026] [2023-09-01 13:10:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:10:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:10:54,231 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) [2023-09-01 13:10:54,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:10:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:54,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 13:10:54,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:10:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:54,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:10:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790499026] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:10:54,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:10:54,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2023-09-01 13:10:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812977703] [2023-09-01 13:10:54,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:10:54,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:10:54,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:10:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:10:54,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 148 [2023-09-01 13:10:54,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 70 flow. Second operand has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:54,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:54,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 148 [2023-09-01 13:10:54,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:55,154 INFO L130 PetriNetUnfolder]: 111/200 cut-off events. [2023-09-01 13:10:55,155 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 13:10:55,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 200 events. 111/200 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 547 event pairs, 4 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 161. Up to 66 conditions per place. [2023-09-01 13:10:55,160 INFO L137 encePairwiseOnDemand]: 139/148 looper letters, 44 selfloop transitions, 18 changer transitions 0/62 dead transitions. [2023-09-01 13:10:55,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 307 flow [2023-09-01 13:10:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:10:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:10:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 788 transitions. [2023-09-01 13:10:55,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436936936936937 [2023-09-01 13:10:55,167 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 788 transitions. [2023-09-01 13:10:55,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 788 transitions. [2023-09-01 13:10:55,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:55,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 788 transitions. [2023-09-01 13:10:55,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 65.66666666666667) internal successors, (788), 12 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:55,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:55,176 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:55,177 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 70 flow. Second operand 12 states and 788 transitions. [2023-09-01 13:10:55,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 307 flow [2023-09-01 13:10:55,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 13:10:55,179 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 174 flow [2023-09-01 13:10:55,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-09-01 13:10:55,180 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2023-09-01 13:10:55,180 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 174 flow [2023-09-01 13:10:55,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:55,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:55,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:55,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:10:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:10:55,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:10:55,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -800121287, now seen corresponding path program 1 times [2023-09-01 13:10:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:55,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459595796] [2023-09-01 13:10:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:56,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:56,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459595796] [2023-09-01 13:10:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459595796] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:10:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403513296] [2023-09-01 13:10:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:56,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:10:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:10:56,057 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) [2023-09-01 13:10:56,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:10:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 13:10:56,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:10:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:56,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:10:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:10:56,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403513296] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:10:56,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:10:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-09-01 13:10:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944738826] [2023-09-01 13:10:56,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:10:56,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:10:56,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:10:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:10:57,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:10:57,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 174 flow. Second operand has 20 states, 20 states have (on average 56.25) internal successors, (1125), 20 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:57,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:57,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:10:57,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:58,881 INFO L130 PetriNetUnfolder]: 429/757 cut-off events. [2023-09-01 13:10:58,881 INFO L131 PetriNetUnfolder]: For 1007/1007 co-relation queries the response was YES. [2023-09-01 13:10:58,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2625 conditions, 757 events. 429/757 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3338 event pairs, 12 based on Foata normal form. 5/762 useless extension candidates. Maximal degree in co-relation 1497. Up to 203 conditions per place. [2023-09-01 13:10:58,886 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 97 selfloop transitions, 94 changer transitions 34/225 dead transitions. [2023-09-01 13:10:58,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 225 transitions, 1551 flow [2023-09-01 13:10:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 13:10:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 13:10:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2195 transitions. [2023-09-01 13:10:58,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008400292184076 [2023-09-01 13:10:58,893 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2195 transitions. [2023-09-01 13:10:58,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2195 transitions. [2023-09-01 13:10:58,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:58,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2195 transitions. [2023-09-01 13:10:58,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 59.32432432432432) internal successors, (2195), 37 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:58,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:58,908 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:58,908 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 174 flow. Second operand 37 states and 2195 transitions. [2023-09-01 13:10:58,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 225 transitions, 1551 flow [2023-09-01 13:10:58,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 225 transitions, 1496 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-09-01 13:10:58,917 INFO L231 Difference]: Finished difference. Result has 92 places, 127 transitions, 1097 flow [2023-09-01 13:10:58,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1097, PETRI_PLACES=92, PETRI_TRANSITIONS=127} [2023-09-01 13:10:58,918 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-09-01 13:10:58,918 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 127 transitions, 1097 flow [2023-09-01 13:10:58,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.25) internal successors, (1125), 20 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:58,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:58,919 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:58,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:10:59,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 13:10:59,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:10:59,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1631516584, now seen corresponding path program 2 times [2023-09-01 13:10:59,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:59,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2754179] [2023-09-01 13:10:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:10:59,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:59,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2754179] [2023-09-01 13:10:59,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2754179] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:10:59,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:10:59,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:10:59,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608161190] [2023-09-01 13:10:59,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:10:59,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:10:59,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:10:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:10:59,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-09-01 13:10:59,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 127 transitions, 1097 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:59,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:59,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-09-01 13:10:59,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:59,582 INFO L130 PetriNetUnfolder]: 503/890 cut-off events. [2023-09-01 13:10:59,583 INFO L131 PetriNetUnfolder]: For 4815/4815 co-relation queries the response was YES. [2023-09-01 13:10:59,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4378 conditions, 890 events. 503/890 cut-off events. For 4815/4815 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4060 event pairs, 72 based on Foata normal form. 8/898 useless extension candidates. Maximal degree in co-relation 4308. Up to 343 conditions per place. [2023-09-01 13:10:59,592 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 148 selfloop transitions, 68 changer transitions 0/216 dead transitions. [2023-09-01 13:10:59,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 216 transitions, 2256 flow [2023-09-01 13:10:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:10:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:10:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 500 transitions. [2023-09-01 13:10:59,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826254826254826 [2023-09-01 13:10:59,594 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 500 transitions. [2023-09-01 13:10:59,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 500 transitions. [2023-09-01 13:10:59,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:10:59,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 500 transitions. [2023-09-01 13:10:59,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:59,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:59,598 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:59,598 INFO L175 Difference]: Start difference. First operand has 92 places, 127 transitions, 1097 flow. Second operand 7 states and 500 transitions. [2023-09-01 13:10:59,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 216 transitions, 2256 flow [2023-09-01 13:10:59,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 216 transitions, 1915 flow, removed 156 selfloop flow, removed 11 redundant places. [2023-09-01 13:10:59,633 INFO L231 Difference]: Finished difference. Result has 88 places, 164 transitions, 1486 flow [2023-09-01 13:10:59,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1486, PETRI_PLACES=88, PETRI_TRANSITIONS=164} [2023-09-01 13:10:59,634 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 66 predicate places. [2023-09-01 13:10:59,635 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 164 transitions, 1486 flow [2023-09-01 13:10:59,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:59,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:10:59,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:10:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:10:59,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:10:59,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:10:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 624053438, now seen corresponding path program 3 times [2023-09-01 13:10:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:10:59,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595306287] [2023-09-01 13:10:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:10:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:10:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:10:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:10:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:10:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595306287] [2023-09-01 13:10:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595306287] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:10:59,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:10:59,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:10:59,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990054746] [2023-09-01 13:10:59,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:10:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:10:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:10:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:10:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:10:59,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-09-01 13:10:59,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 164 transitions, 1486 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:10:59,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:10:59,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-09-01 13:10:59,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:10:59,991 INFO L130 PetriNetUnfolder]: 497/872 cut-off events. [2023-09-01 13:10:59,991 INFO L131 PetriNetUnfolder]: For 5287/5287 co-relation queries the response was YES. [2023-09-01 13:10:59,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 872 events. 497/872 cut-off events. For 5287/5287 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3930 event pairs, 127 based on Foata normal form. 8/874 useless extension candidates. Maximal degree in co-relation 3701. Up to 501 conditions per place. [2023-09-01 13:11:00,000 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 142 selfloop transitions, 53 changer transitions 0/195 dead transitions. [2023-09-01 13:11:00,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 195 transitions, 2070 flow [2023-09-01 13:11:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:11:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:11:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 356 transitions. [2023-09-01 13:11:00,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810810810810811 [2023-09-01 13:11:00,002 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 356 transitions. [2023-09-01 13:11:00,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 356 transitions. [2023-09-01 13:11:00,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:00,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 356 transitions. [2023-09-01 13:11:00,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,005 INFO L175 Difference]: Start difference. First operand has 88 places, 164 transitions, 1486 flow. Second operand 5 states and 356 transitions. [2023-09-01 13:11:00,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 195 transitions, 2070 flow [2023-09-01 13:11:00,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 2030 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-09-01 13:11:00,036 INFO L231 Difference]: Finished difference. Result has 94 places, 166 transitions, 1656 flow [2023-09-01 13:11:00,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1656, PETRI_PLACES=94, PETRI_TRANSITIONS=166} [2023-09-01 13:11:00,037 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 72 predicate places. [2023-09-01 13:11:00,037 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 166 transitions, 1656 flow [2023-09-01 13:11:00,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:00,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:00,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 13:11:00,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:11:00,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1966469734, now seen corresponding path program 4 times [2023-09-01 13:11:00,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:00,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257305118] [2023-09-01 13:11:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:11:00,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:00,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257305118] [2023-09-01 13:11:00,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257305118] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:11:00,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:11:00,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 13:11:00,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135514045] [2023-09-01 13:11:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:11:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 13:11:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 13:11:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 13:11:00,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-09-01 13:11:00,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 166 transitions, 1656 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:00,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-09-01 13:11:00,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:00,430 INFO L130 PetriNetUnfolder]: 495/858 cut-off events. [2023-09-01 13:11:00,430 INFO L131 PetriNetUnfolder]: For 5709/5709 co-relation queries the response was YES. [2023-09-01 13:11:00,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 858 events. 495/858 cut-off events. For 5709/5709 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3793 event pairs, 76 based on Foata normal form. 4/856 useless extension candidates. Maximal degree in co-relation 3851. Up to 343 conditions per place. [2023-09-01 13:11:00,439 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 135 selfloop transitions, 67 changer transitions 0/202 dead transitions. [2023-09-01 13:11:00,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 202 transitions, 2263 flow [2023-09-01 13:11:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:11:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:11:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 359 transitions. [2023-09-01 13:11:00,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851351351351351 [2023-09-01 13:11:00,442 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 359 transitions. [2023-09-01 13:11:00,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 359 transitions. [2023-09-01 13:11:00,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:00,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 359 transitions. [2023-09-01 13:11:00,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,445 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,445 INFO L175 Difference]: Start difference. First operand has 94 places, 166 transitions, 1656 flow. Second operand 5 states and 359 transitions. [2023-09-01 13:11:00,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 202 transitions, 2263 flow [2023-09-01 13:11:00,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 202 transitions, 2235 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-09-01 13:11:00,500 INFO L231 Difference]: Finished difference. Result has 96 places, 165 transitions, 1745 flow [2023-09-01 13:11:00,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1745, PETRI_PLACES=96, PETRI_TRANSITIONS=165} [2023-09-01 13:11:00,503 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2023-09-01 13:11:00,503 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 165 transitions, 1745 flow [2023-09-01 13:11:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:00,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:00,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 13:11:00,504 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:11:00,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -722109947, now seen corresponding path program 1 times [2023-09-01 13:11:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066208249] [2023-09-01 13:11:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:02,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066208249] [2023-09-01 13:11:02,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066208249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:11:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098066229] [2023-09-01 13:11:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:02,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:11:02,030 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) [2023-09-01 13:11:02,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:11:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 13:11:02,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:11:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:11:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098066229] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:11:04,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:11:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-09-01 13:11:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656852332] [2023-09-01 13:11:04,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:11:04,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:11:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:11:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:11:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 148 [2023-09-01 13:11:06,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 165 transitions, 1745 flow. Second operand has 25 states, 25 states have (on average 57.12) internal successors, (1428), 25 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:06,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:06,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 148 [2023-09-01 13:11:06,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:25,138 INFO L130 PetriNetUnfolder]: 1243/2184 cut-off events. [2023-09-01 13:11:25,138 INFO L131 PetriNetUnfolder]: For 13949/13949 co-relation queries the response was YES. [2023-09-01 13:11:25,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11497 conditions, 2184 events. 1243/2184 cut-off events. For 13949/13949 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12211 event pairs, 0 based on Foata normal form. 10/2188 useless extension candidates. Maximal degree in co-relation 10883. Up to 435 conditions per place. [2023-09-01 13:11:25,156 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 238 selfloop transitions, 311 changer transitions 92/641 dead transitions. [2023-09-01 13:11:25,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 641 transitions, 7327 flow [2023-09-01 13:11:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-09-01 13:11:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-09-01 13:11:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3783 transitions. [2023-09-01 13:11:25,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40572715572715573 [2023-09-01 13:11:25,166 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3783 transitions. [2023-09-01 13:11:25,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3783 transitions. [2023-09-01 13:11:25,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:25,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3783 transitions. [2023-09-01 13:11:25,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.04761904761905) internal successors, (3783), 63 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:25,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:25,219 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:25,220 INFO L175 Difference]: Start difference. First operand has 96 places, 165 transitions, 1745 flow. Second operand 63 states and 3783 transitions. [2023-09-01 13:11:25,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 641 transitions, 7327 flow [2023-09-01 13:11:25,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 641 transitions, 6935 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 13:11:25,311 INFO L231 Difference]: Finished difference. Result has 179 places, 392 transitions, 4964 flow [2023-09-01 13:11:25,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=4964, PETRI_PLACES=179, PETRI_TRANSITIONS=392} [2023-09-01 13:11:25,312 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2023-09-01 13:11:25,312 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 392 transitions, 4964 flow [2023-09-01 13:11:25,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.12) internal successors, (1428), 25 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:25,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:25,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:25,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:11:25,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:25,519 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:11:25,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1771081357, now seen corresponding path program 2 times [2023-09-01 13:11:25,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:25,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722644160] [2023-09-01 13:11:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:25,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:26,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722644160] [2023-09-01 13:11:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722644160] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:11:26,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999873667] [2023-09-01 13:11:26,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:11:26,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:11:26,211 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) [2023-09-01 13:11:26,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:11:26,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:11:26,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:11:26,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 13:11:26,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:11:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:26,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:11:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:28,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999873667] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:11:28,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:11:28,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-09-01 13:11:28,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068900533] [2023-09-01 13:11:28,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:11:28,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 13:11:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 13:11:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-09-01 13:11:28,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 148 [2023-09-01 13:11:28,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 392 transitions, 4964 flow. Second operand has 25 states, 25 states have (on average 60.16) internal successors, (1504), 25 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:28,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:28,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 148 [2023-09-01 13:11:28,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:38,756 INFO L130 PetriNetUnfolder]: 1823/3206 cut-off events. [2023-09-01 13:11:38,756 INFO L131 PetriNetUnfolder]: For 24414/24426 co-relation queries the response was YES. [2023-09-01 13:11:38,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18913 conditions, 3206 events. 1823/3206 cut-off events. For 24414/24426 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19375 event pairs, 14 based on Foata normal form. 25/3225 useless extension candidates. Maximal degree in co-relation 18793. Up to 810 conditions per place. [2023-09-01 13:11:38,789 INFO L137 encePairwiseOnDemand]: 140/148 looper letters, 288 selfloop transitions, 456 changer transitions 113/862 dead transitions. [2023-09-01 13:11:38,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 862 transitions, 11492 flow [2023-09-01 13:11:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-09-01 13:11:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-09-01 13:11:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3669 transitions. [2023-09-01 13:11:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42742311276794037 [2023-09-01 13:11:38,795 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3669 transitions. [2023-09-01 13:11:38,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3669 transitions. [2023-09-01 13:11:38,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:38,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3669 transitions. [2023-09-01 13:11:38,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 63.258620689655174) internal successors, (3669), 58 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:38,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:38,863 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:38,863 INFO L175 Difference]: Start difference. First operand has 179 places, 392 transitions, 4964 flow. Second operand 58 states and 3669 transitions. [2023-09-01 13:11:38,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 862 transitions, 11492 flow [2023-09-01 13:11:39,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 862 transitions, 11262 flow, removed 107 selfloop flow, removed 12 redundant places. [2023-09-01 13:11:39,045 INFO L231 Difference]: Finished difference. Result has 242 places, 607 transitions, 9382 flow [2023-09-01 13:11:39,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9382, PETRI_PLACES=242, PETRI_TRANSITIONS=607} [2023-09-01 13:11:39,046 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 220 predicate places. [2023-09-01 13:11:39,046 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 607 transitions, 9382 flow [2023-09-01 13:11:39,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 60.16) internal successors, (1504), 25 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:39,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:39,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:39,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:11:39,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:39,253 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:11:39,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash -567010117, now seen corresponding path program 3 times [2023-09-01 13:11:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:39,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859011802] [2023-09-01 13:11:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:39,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:39,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:39,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859011802] [2023-09-01 13:11:39,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859011802] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:11:39,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019309649] [2023-09-01 13:11:39,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:11:39,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:39,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:11:39,417 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) [2023-09-01 13:11:39,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:11:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:11:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:11:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 13:11:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:11:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:39,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:11:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019309649] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:11:39,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:11:39,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 10 [2023-09-01 13:11:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014227235] [2023-09-01 13:11:39,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:11:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 13:11:39,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 13:11:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-09-01 13:11:39,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-09-01 13:11:39,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 607 transitions, 9382 flow. Second operand has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:39,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:39,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-09-01 13:11:39,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:11:40,798 INFO L130 PetriNetUnfolder]: 2335/3999 cut-off events. [2023-09-01 13:11:40,798 INFO L131 PetriNetUnfolder]: For 41230/41250 co-relation queries the response was YES. [2023-09-01 13:11:40,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26745 conditions, 3999 events. 2335/3999 cut-off events. For 41230/41250 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24611 event pairs, 46 based on Foata normal form. 54/4045 useless extension candidates. Maximal degree in co-relation 26585. Up to 838 conditions per place. [2023-09-01 13:11:40,835 INFO L137 encePairwiseOnDemand]: 142/148 looper letters, 324 selfloop transitions, 632 changer transitions 0/961 dead transitions. [2023-09-01 13:11:40,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 961 transitions, 16283 flow [2023-09-01 13:11:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:11:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:11:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 909 transitions. [2023-09-01 13:11:40,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47245322245322247 [2023-09-01 13:11:40,838 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 909 transitions. [2023-09-01 13:11:40,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 909 transitions. [2023-09-01 13:11:40,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:11:40,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 909 transitions. [2023-09-01 13:11:40,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.92307692307692) internal successors, (909), 13 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:40,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 148.0) internal successors, (2072), 14 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:40,842 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 148.0) internal successors, (2072), 14 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:40,842 INFO L175 Difference]: Start difference. First operand has 242 places, 607 transitions, 9382 flow. Second operand 13 states and 909 transitions. [2023-09-01 13:11:40,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 961 transitions, 16283 flow [2023-09-01 13:11:41,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 961 transitions, 15862 flow, removed 179 selfloop flow, removed 26 redundant places. [2023-09-01 13:11:41,377 INFO L231 Difference]: Finished difference. Result has 222 places, 837 transitions, 14953 flow [2023-09-01 13:11:41,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=9107, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14953, PETRI_PLACES=222, PETRI_TRANSITIONS=837} [2023-09-01 13:11:41,390 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 200 predicate places. [2023-09-01 13:11:41,390 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 837 transitions, 14953 flow [2023-09-01 13:11:41,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:41,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:11:41,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:11:41,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:11:41,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:41,592 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:11:41,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:11:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash -319686935, now seen corresponding path program 4 times [2023-09-01 13:11:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:11:41,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007259204] [2023-09-01 13:11:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:11:41,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:11:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:11:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:11:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007259204] [2023-09-01 13:11:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007259204] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:11:42,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524994234] [2023-09-01 13:11:42,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:11:42,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:11:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:11:42,736 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) [2023-09-01 13:11:42,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:11:42,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:11:42,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:11:42,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 13:11:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:11:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:43,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:11:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:11:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524994234] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:11:44,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:11:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-09-01 13:11:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47572130] [2023-09-01 13:11:44,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:11:44,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 13:11:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:11:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 13:11:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-09-01 13:11:45,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:11:45,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 837 transitions, 14953 flow. Second operand has 27 states, 27 states have (on average 56.111111111111114) internal successors, (1515), 27 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:11:45,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:11:45,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:11:45,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:12:05,038 INFO L130 PetriNetUnfolder]: 3077/5345 cut-off events. [2023-09-01 13:12:05,038 INFO L131 PetriNetUnfolder]: For 67505/67505 co-relation queries the response was YES. [2023-09-01 13:12:05,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39243 conditions, 5345 events. 3077/5345 cut-off events. For 67505/67505 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35370 event pairs, 18 based on Foata normal form. 15/5350 useless extension candidates. Maximal degree in co-relation 38193. Up to 1977 conditions per place. [2023-09-01 13:12:05,089 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 462 selfloop transitions, 731 changer transitions 106/1299 dead transitions. [2023-09-01 13:12:05,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1299 transitions, 23674 flow [2023-09-01 13:12:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-09-01 13:12:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-09-01 13:12:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3935 transitions. [2023-09-01 13:12:05,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39683340056474387 [2023-09-01 13:12:05,096 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3935 transitions. [2023-09-01 13:12:05,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3935 transitions. [2023-09-01 13:12:05,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:12:05,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3935 transitions. [2023-09-01 13:12:05,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 58.73134328358209) internal successors, (3935), 67 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:05,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 148.0) internal successors, (10064), 68 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:05,115 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 148.0) internal successors, (10064), 68 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:05,115 INFO L175 Difference]: Start difference. First operand has 222 places, 837 transitions, 14953 flow. Second operand 67 states and 3935 transitions. [2023-09-01 13:12:05,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1299 transitions, 23674 flow [2023-09-01 13:12:05,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1299 transitions, 22880 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-09-01 13:12:05,872 INFO L231 Difference]: Finished difference. Result has 312 places, 1042 transitions, 21007 flow [2023-09-01 13:12:05,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=14361, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=21007, PETRI_PLACES=312, PETRI_TRANSITIONS=1042} [2023-09-01 13:12:05,874 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 290 predicate places. [2023-09-01 13:12:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1042 transitions, 21007 flow [2023-09-01 13:12:05,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.111111111111114) internal successors, (1515), 27 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:05,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:12:05,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:12:05,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:12:06,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:12:06,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:12:06,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:12:06,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1054529367, now seen corresponding path program 5 times [2023-09-01 13:12:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:12:06,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167578856] [2023-09-01 13:12:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:12:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:12:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:12:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:07,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:12:07,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167578856] [2023-09-01 13:12:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167578856] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:12:07,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459886362] [2023-09-01 13:12:07,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:12:07,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:12:07,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:12:07,482 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) [2023-09-01 13:12:07,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:12:07,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:12:07,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:12:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 13:12:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:12:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:08,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:12:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:09,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459886362] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:12:09,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:12:09,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-09-01 13:12:09,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545839361] [2023-09-01 13:12:09,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:12:09,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:12:09,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:12:09,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:12:09,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2023-09-01 13:12:10,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 148 [2023-09-01 13:12:10,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1042 transitions, 21007 flow. Second operand has 26 states, 26 states have (on average 57.19230769230769) internal successors, (1487), 26 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:10,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:12:10,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 148 [2023-09-01 13:12:10,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:12:42,112 INFO L130 PetriNetUnfolder]: 3815/6634 cut-off events. [2023-09-01 13:12:42,112 INFO L131 PetriNetUnfolder]: For 107482/107482 co-relation queries the response was YES. [2023-09-01 13:12:42,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52929 conditions, 6634 events. 3815/6634 cut-off events. For 107482/107482 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 46047 event pairs, 14 based on Foata normal form. 18/6642 useless extension candidates. Maximal degree in co-relation 52752. Up to 2374 conditions per place. [2023-09-01 13:12:42,180 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 495 selfloop transitions, 1029 changer transitions 137/1661 dead transitions. [2023-09-01 13:12:42,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1661 transitions, 33858 flow [2023-09-01 13:12:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-09-01 13:12:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-09-01 13:12:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4708 transitions. [2023-09-01 13:12:42,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026684912760862 [2023-09-01 13:12:42,196 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4708 transitions. [2023-09-01 13:12:42,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4708 transitions. [2023-09-01 13:12:42,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:12:42,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4708 transitions. [2023-09-01 13:12:42,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 59.59493670886076) internal successors, (4708), 79 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:42,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 148.0) internal successors, (11840), 80 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:42,218 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 148.0) internal successors, (11840), 80 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:42,219 INFO L175 Difference]: Start difference. First operand has 312 places, 1042 transitions, 21007 flow. Second operand 79 states and 4708 transitions. [2023-09-01 13:12:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1661 transitions, 33858 flow [2023-09-01 13:12:43,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1661 transitions, 32422 flow, removed 297 selfloop flow, removed 25 redundant places. [2023-09-01 13:12:43,549 INFO L231 Difference]: Finished difference. Result has 385 places, 1353 transitions, 30461 flow [2023-09-01 13:12:43,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=20081, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=737, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=30461, PETRI_PLACES=385, PETRI_TRANSITIONS=1353} [2023-09-01 13:12:43,551 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 363 predicate places. [2023-09-01 13:12:43,551 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1353 transitions, 30461 flow [2023-09-01 13:12:43,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 57.19230769230769) internal successors, (1487), 26 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:43,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:12:43,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:12:43,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:12:43,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:12:43,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:12:43,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:12:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1208967995, now seen corresponding path program 6 times [2023-09-01 13:12:43,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:12:43,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60893384] [2023-09-01 13:12:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:12:43,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:12:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:12:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:44,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:12:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60893384] [2023-09-01 13:12:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60893384] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:12:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943001102] [2023-09-01 13:12:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:12:44,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:12:44,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:12:44,851 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) [2023-09-01 13:12:44,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:12:44,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:12:44,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:12:44,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 13:12:45,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:12:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:45,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:12:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:12:46,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943001102] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:12:46,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:12:46,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-09-01 13:12:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688396669] [2023-09-01 13:12:46,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:12:46,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:12:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:12:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:12:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2023-09-01 13:12:47,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:12:47,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1353 transitions, 30461 flow. Second operand has 31 states, 31 states have (on average 55.83870967741935) internal successors, (1731), 31 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:47,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:12:47,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:12:47,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:12:59,098 INFO L130 PetriNetUnfolder]: 3977/6905 cut-off events. [2023-09-01 13:12:59,098 INFO L131 PetriNetUnfolder]: For 138288/138288 co-relation queries the response was YES. [2023-09-01 13:12:59,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61621 conditions, 6905 events. 3977/6905 cut-off events. For 138288/138288 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48099 event pairs, 6 based on Foata normal form. 13/6912 useless extension candidates. Maximal degree in co-relation 61371. Up to 2427 conditions per place. [2023-09-01 13:12:59,177 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 303 selfloop transitions, 1399 changer transitions 89/1791 dead transitions. [2023-09-01 13:12:59,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1791 transitions, 41197 flow [2023-09-01 13:12:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-09-01 13:12:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-09-01 13:12:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3399 transitions. [2023-09-01 13:12:59,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959692451071761 [2023-09-01 13:12:59,186 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3399 transitions. [2023-09-01 13:12:59,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3399 transitions. [2023-09-01 13:12:59,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:12:59,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3399 transitions. [2023-09-01 13:12:59,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 58.60344827586207) internal successors, (3399), 58 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:59,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:59,208 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:12:59,208 INFO L175 Difference]: Start difference. First operand has 385 places, 1353 transitions, 30461 flow. Second operand 58 states and 3399 transitions. [2023-09-01 13:12:59,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1791 transitions, 41197 flow [2023-09-01 13:13:01,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1791 transitions, 40649 flow, removed 233 selfloop flow, removed 17 redundant places. [2023-09-01 13:13:01,365 INFO L231 Difference]: Finished difference. Result has 420 places, 1598 transitions, 40780 flow [2023-09-01 13:13:01,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=30093, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=40780, PETRI_PLACES=420, PETRI_TRANSITIONS=1598} [2023-09-01 13:13:01,366 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 398 predicate places. [2023-09-01 13:13:01,366 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1598 transitions, 40780 flow [2023-09-01 13:13:01,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 55.83870967741935) internal successors, (1731), 31 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:01,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:13:01,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:13:01,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 13:13:01,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 13:13:01,569 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:13:01,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:13:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1594707129, now seen corresponding path program 7 times [2023-09-01 13:13:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:13:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682562036] [2023-09-01 13:13:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:13:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:13:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:13:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:02,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:13:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682562036] [2023-09-01 13:13:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682562036] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:13:02,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708858290] [2023-09-01 13:13:02,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:13:02,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:13:02,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:13:02,572 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:13:02,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:13:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:13:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 13:13:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:13:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:03,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:13:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:04,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708858290] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:13:04,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:13:04,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-09-01 13:13:04,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971651293] [2023-09-01 13:13:04,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:13:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:13:04,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:13:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:13:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2023-09-01 13:13:05,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:13:05,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1598 transitions, 40780 flow. Second operand has 30 states, 30 states have (on average 55.766666666666666) internal successors, (1673), 30 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:05,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:13:05,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:13:05,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:13:17,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:13:39,982 INFO L130 PetriNetUnfolder]: 4695/8116 cut-off events. [2023-09-01 13:13:39,982 INFO L131 PetriNetUnfolder]: For 198426/198426 co-relation queries the response was YES. [2023-09-01 13:13:40,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80276 conditions, 8116 events. 4695/8116 cut-off events. For 198426/198426 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 57710 event pairs, 10 based on Foata normal form. 12/8128 useless extension candidates. Maximal degree in co-relation 79988. Up to 1927 conditions per place. [2023-09-01 13:13:40,079 INFO L137 encePairwiseOnDemand]: 137/148 looper letters, 253 selfloop transitions, 1867 changer transitions 84/2204 dead transitions. [2023-09-01 13:13:40,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 2204 transitions, 56486 flow [2023-09-01 13:13:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-09-01 13:13:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-09-01 13:13:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 5207 transitions. [2023-09-01 13:13:40,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953082295778925 [2023-09-01 13:13:40,087 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 5207 transitions. [2023-09-01 13:13:40,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 5207 transitions. [2023-09-01 13:13:40,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:13:40,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 5207 transitions. [2023-09-01 13:13:40,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 58.50561797752809) internal successors, (5207), 89 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:40,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 148.0) internal successors, (13320), 90 states have internal predecessors, (13320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:40,105 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 148.0) internal successors, (13320), 90 states have internal predecessors, (13320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:40,105 INFO L175 Difference]: Start difference. First operand has 420 places, 1598 transitions, 40780 flow. Second operand 89 states and 5207 transitions. [2023-09-01 13:13:40,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 2204 transitions, 56486 flow [2023-09-01 13:13:42,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 2204 transitions, 55315 flow, removed 220 selfloop flow, removed 20 redundant places. [2023-09-01 13:13:43,017 INFO L231 Difference]: Finished difference. Result has 493 places, 1960 transitions, 53409 flow [2023-09-01 13:13:43,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=40030, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=53409, PETRI_PLACES=493, PETRI_TRANSITIONS=1960} [2023-09-01 13:13:43,018 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 471 predicate places. [2023-09-01 13:13:43,019 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1960 transitions, 53409 flow [2023-09-01 13:13:43,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 55.766666666666666) internal successors, (1673), 30 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:43,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:13:43,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:13:43,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 13:13:43,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 13:13:43,220 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:13:43,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:13:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash 808345547, now seen corresponding path program 5 times [2023-09-01 13:13:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:13:43,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350237378] [2023-09-01 13:13:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:13:43,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:13:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:13:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:43,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:13:43,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350237378] [2023-09-01 13:13:43,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350237378] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:13:43,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017814648] [2023-09-01 13:13:43,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:13:43,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:13:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:13:43,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:13:43,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:13:43,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 13:13:43,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:13:43,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 13:13:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:13:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:44,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:13:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:44,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017814648] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:13:44,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:13:44,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-09-01 13:13:44,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010066690] [2023-09-01 13:13:44,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:13:44,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:13:44,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:13:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:13:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-09-01 13:13:45,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:13:45,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1960 transitions, 53409 flow. Second operand has 30 states, 30 states have (on average 55.7) internal successors, (1671), 30 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:45,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:13:45,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:13:45,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:13:57,442 INFO L130 PetriNetUnfolder]: 5939/10335 cut-off events. [2023-09-01 13:13:57,442 INFO L131 PetriNetUnfolder]: For 264440/264440 co-relation queries the response was YES. [2023-09-01 13:13:57,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107697 conditions, 10335 events. 5939/10335 cut-off events. For 264440/264440 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 77070 event pairs, 62 based on Foata normal form. 19/10354 useless extension candidates. Maximal degree in co-relation 107331. Up to 2374 conditions per place. [2023-09-01 13:13:57,561 INFO L137 encePairwiseOnDemand]: 137/148 looper letters, 377 selfloop transitions, 2316 changer transitions 114/2807 dead transitions. [2023-09-01 13:13:57,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2807 transitions, 78105 flow [2023-09-01 13:13:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-09-01 13:13:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-09-01 13:13:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4450 transitions. [2023-09-01 13:13:57,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956258890469417 [2023-09-01 13:13:57,566 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4450 transitions. [2023-09-01 13:13:57,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4450 transitions. [2023-09-01 13:13:57,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:13:57,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4450 transitions. [2023-09-01 13:13:57,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 58.55263157894737) internal successors, (4450), 76 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:57,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 148.0) internal successors, (11396), 77 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:57,581 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 148.0) internal successors, (11396), 77 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:13:57,582 INFO L175 Difference]: Start difference. First operand has 493 places, 1960 transitions, 53409 flow. Second operand 76 states and 4450 transitions. [2023-09-01 13:13:57,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2807 transitions, 78105 flow [2023-09-01 13:14:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 2807 transitions, 76534 flow, removed 508 selfloop flow, removed 26 redundant places. [2023-09-01 13:14:02,440 INFO L231 Difference]: Finished difference. Result has 562 places, 2562 transitions, 75152 flow [2023-09-01 13:14:02,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=52398, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=75152, PETRI_PLACES=562, PETRI_TRANSITIONS=2562} [2023-09-01 13:14:02,443 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 540 predicate places. [2023-09-01 13:14:02,443 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 2562 transitions, 75152 flow [2023-09-01 13:14:02,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 55.7) internal successors, (1671), 30 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:02,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:14:02,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:14:02,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:14:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 13:14:02,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:14:02,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:14:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1644856908, now seen corresponding path program 8 times [2023-09-01 13:14:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:14:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249155618] [2023-09-01 13:14:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:14:02,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:14:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:14:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:04,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:14:04,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249155618] [2023-09-01 13:14:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249155618] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:14:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210398465] [2023-09-01 13:14:04,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:14:04,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:14:04,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:14:04,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:14:04,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:14:04,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:14:04,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:14:04,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:14:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:14:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:06,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:14:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:14:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210398465] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:14:11,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:14:11,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-09-01 13:14:11,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344104377] [2023-09-01 13:14:11,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:14:11,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:14:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:14:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:14:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2023-09-01 13:14:12,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:14:12,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 2562 transitions, 75152 flow. Second operand has 32 states, 32 states have (on average 55.96875) internal successors, (1791), 32 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:14:12,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:14:12,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:14:12,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:15:44,103 INFO L130 PetriNetUnfolder]: 6997/12234 cut-off events. [2023-09-01 13:15:44,103 INFO L131 PetriNetUnfolder]: For 359131/359131 co-relation queries the response was YES. [2023-09-01 13:15:44,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139433 conditions, 12234 events. 6997/12234 cut-off events. For 359131/359131 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 92758 event pairs, 8 based on Foata normal form. 34/12268 useless extension candidates. Maximal degree in co-relation 139113. Up to 4506 conditions per place. [2023-09-01 13:15:44,262 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 1082 selfloop transitions, 2161 changer transitions 239/3482 dead transitions. [2023-09-01 13:15:44,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 3482 transitions, 102410 flow [2023-09-01 13:15:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-09-01 13:15:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-09-01 13:15:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5927 transitions. [2023-09-01 13:15:44,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965078940326465 [2023-09-01 13:15:44,269 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5927 transitions. [2023-09-01 13:15:44,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5927 transitions. [2023-09-01 13:15:44,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:15:44,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5927 transitions. [2023-09-01 13:15:44,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 58.68316831683168) internal successors, (5927), 101 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:44,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 148.0) internal successors, (15096), 102 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:44,289 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 148.0) internal successors, (15096), 102 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:44,290 INFO L175 Difference]: Start difference. First operand has 562 places, 2562 transitions, 75152 flow. Second operand 101 states and 5927 transitions. [2023-09-01 13:15:44,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 3482 transitions, 102410 flow [2023-09-01 13:15:52,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 3482 transitions, 99034 flow, removed 555 selfloop flow, removed 25 redundant places. [2023-09-01 13:15:52,478 INFO L231 Difference]: Finished difference. Result has 679 places, 2999 transitions, 94330 flow [2023-09-01 13:15:52,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=72715, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=94330, PETRI_PLACES=679, PETRI_TRANSITIONS=2999} [2023-09-01 13:15:52,480 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 657 predicate places. [2023-09-01 13:15:52,481 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 2999 transitions, 94330 flow [2023-09-01 13:15:52,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 55.96875) internal successors, (1791), 32 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:52,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:15:52,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:15:52,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:15:52,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:15:52,686 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:15:52,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:15:52,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1527671576, now seen corresponding path program 9 times [2023-09-01 13:15:52,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:15:52,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981104320] [2023-09-01 13:15:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:15:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:15:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:15:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:15:53,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:15:53,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981104320] [2023-09-01 13:15:53,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981104320] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:15:53,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469089059] [2023-09-01 13:15:53,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:15:53,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:15:53,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:15:53,636 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:15:53,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:15:53,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 13:15:53,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:15:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 13:15:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:15:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:15:54,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:15:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:15:56,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469089059] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:15:56,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:15:56,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-09-01 13:15:56,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6539976] [2023-09-01 13:15:56,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:15:56,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:15:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:15:56,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:15:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2023-09-01 13:15:56,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:15:56,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 2999 transitions, 94330 flow. Second operand has 31 states, 31 states have (on average 55.903225806451616) internal successors, (1733), 31 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:15:56,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:15:56,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:15:56,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:16:00,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:17:22,676 INFO L130 PetriNetUnfolder]: 9147/15936 cut-off events. [2023-09-01 13:17:22,677 INFO L131 PetriNetUnfolder]: For 566998/566998 co-relation queries the response was YES. [2023-09-01 13:17:22,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191569 conditions, 15936 events. 9147/15936 cut-off events. For 566998/566998 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 126393 event pairs, 6 based on Foata normal form. 32/15968 useless extension candidates. Maximal degree in co-relation 191146. Up to 3876 conditions per place. [2023-09-01 13:17:22,919 INFO L137 encePairwiseOnDemand]: 137/148 looper letters, 715 selfloop transitions, 3669 changer transitions 248/4632 dead transitions. [2023-09-01 13:17:22,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 4632 transitions, 145984 flow [2023-09-01 13:17:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2023-09-01 13:17:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2023-09-01 13:17:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 9003 transitions. [2023-09-01 13:17:22,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39500702000702 [2023-09-01 13:17:22,929 INFO L72 ComplementDD]: Start complementDD. Operand 154 states and 9003 transitions. [2023-09-01 13:17:22,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 154 states and 9003 transitions. [2023-09-01 13:17:22,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:17:22,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 154 states and 9003 transitions. [2023-09-01 13:17:22,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 155 states, 154 states have (on average 58.46103896103896) internal successors, (9003), 154 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:22,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 155 states, 155 states have (on average 148.0) internal successors, (22940), 155 states have internal predecessors, (22940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:22,960 INFO L81 ComplementDD]: Finished complementDD. Result has 155 states, 155 states have (on average 148.0) internal successors, (22940), 155 states have internal predecessors, (22940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:22,960 INFO L175 Difference]: Start difference. First operand has 679 places, 2999 transitions, 94330 flow. Second operand 154 states and 9003 transitions. [2023-09-01 13:17:22,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 800 places, 4632 transitions, 145984 flow [2023-09-01 13:17:35,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 4632 transitions, 144676 flow, removed 637 selfloop flow, removed 29 redundant places. [2023-09-01 13:17:35,347 INFO L231 Difference]: Finished difference. Result has 829 places, 4128 transitions, 140332 flow [2023-09-01 13:17:35,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=93714, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=154, PETRI_FLOW=140332, PETRI_PLACES=829, PETRI_TRANSITIONS=4128} [2023-09-01 13:17:35,350 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 807 predicate places. [2023-09-01 13:17:35,350 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 4128 transitions, 140332 flow [2023-09-01 13:17:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 55.903225806451616) internal successors, (1733), 31 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:35,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:17:35,351 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:17:35,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 13:17:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:17:35,557 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:17:35,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:17:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1004786846, now seen corresponding path program 10 times [2023-09-01 13:17:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:17:35,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268003091] [2023-09-01 13:17:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:17:35,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:17:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:17:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:17:37,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:17:37,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268003091] [2023-09-01 13:17:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268003091] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:17:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672157803] [2023-09-01 13:17:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:17:37,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:17:37,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:17:37,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:17:37,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:17:37,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:17:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:17:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:17:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:17:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:17:38,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:17:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:17:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672157803] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:17:41,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:17:41,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-09-01 13:17:41,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609585858] [2023-09-01 13:17:41,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:17:41,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:17:41,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:17:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:17:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2023-09-01 13:17:43,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 148 [2023-09-01 13:17:43,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 4128 transitions, 140332 flow. Second operand has 31 states, 31 states have (on average 59.935483870967744) internal successors, (1858), 31 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:17:43,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:17:43,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 148 [2023-09-01 13:17:43,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:18:46,458 INFO L130 PetriNetUnfolder]: 10175/17684 cut-off events. [2023-09-01 13:18:46,458 INFO L131 PetriNetUnfolder]: For 703666/703666 co-relation queries the response was YES. [2023-09-01 13:18:46,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231013 conditions, 17684 events. 10175/17684 cut-off events. For 703666/703666 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 141098 event pairs, 8 based on Foata normal form. 27/17709 useless extension candidates. Maximal degree in co-relation 230554. Up to 7137 conditions per place. [2023-09-01 13:18:46,815 INFO L137 encePairwiseOnDemand]: 140/148 looper letters, 1825 selfloop transitions, 3067 changer transitions 192/5101 dead transitions. [2023-09-01 13:18:46,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 889 places, 5101 transitions, 176201 flow [2023-09-01 13:18:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-09-01 13:18:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-09-01 13:18:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5903 transitions. [2023-09-01 13:18:46,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42430994824611845 [2023-09-01 13:18:46,822 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5903 transitions. [2023-09-01 13:18:46,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5903 transitions. [2023-09-01 13:18:46,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:18:46,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5903 transitions. [2023-09-01 13:18:46,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 62.797872340425535) internal successors, (5903), 94 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:46,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 148.0) internal successors, (14060), 95 states have internal predecessors, (14060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:46,841 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 148.0) internal successors, (14060), 95 states have internal predecessors, (14060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:18:46,841 INFO L175 Difference]: Start difference. First operand has 829 places, 4128 transitions, 140332 flow. Second operand 94 states and 5903 transitions. [2023-09-01 13:18:46,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 889 places, 5101 transitions, 176201 flow [2023-09-01 13:19:08,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 5101 transitions, 172513 flow, removed 1086 selfloop flow, removed 66 redundant places. [2023-09-01 13:19:08,516 INFO L231 Difference]: Finished difference. Result has 859 places, 4577 transitions, 166102 flow [2023-09-01 13:19:08,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=137562, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=166102, PETRI_PLACES=859, PETRI_TRANSITIONS=4577} [2023-09-01 13:19:08,520 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 837 predicate places. [2023-09-01 13:19:08,520 INFO L495 AbstractCegarLoop]: Abstraction has has 859 places, 4577 transitions, 166102 flow [2023-09-01 13:19:08,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.935483870967744) internal successors, (1858), 31 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:08,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:19:08,521 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:19:08,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 13:19:08,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 13:19:08,727 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:19:08,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:19:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1153779590, now seen corresponding path program 11 times [2023-09-01 13:19:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:19:08,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422452528] [2023-09-01 13:19:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:19:08,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:19:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:19:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:19:09,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:19:09,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422452528] [2023-09-01 13:19:09,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422452528] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:19:09,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922156076] [2023-09-01 13:19:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:19:09,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:19:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:19:09,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:19:09,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 13:19:10,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:19:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:19:10,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 13:19:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:19:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:19:11,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:19:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:19:12,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922156076] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:19:12,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:19:12,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-09-01 13:19:12,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994135462] [2023-09-01 13:19:12,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:19:12,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:19:12,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:19:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:19:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2023-09-01 13:19:13,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:19:13,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 4577 transitions, 166102 flow. Second operand has 31 states, 31 states have (on average 55.903225806451616) internal successors, (1733), 31 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:19:13,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:19:13,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:19:13,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:20:03,708 INFO L130 PetriNetUnfolder]: 10697/18570 cut-off events. [2023-09-01 13:20:03,708 INFO L131 PetriNetUnfolder]: For 840453/840453 co-relation queries the response was YES. [2023-09-01 13:20:03,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251071 conditions, 18570 events. 10697/18570 cut-off events. For 840453/840453 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 149112 event pairs, 44 based on Foata normal form. 32/18602 useless extension candidates. Maximal degree in co-relation 250388. Up to 7340 conditions per place. [2023-09-01 13:20:04,061 INFO L137 encePairwiseOnDemand]: 139/148 looper letters, 1604 selfloop transitions, 3428 changer transitions 165/5197 dead transitions. [2023-09-01 13:20:04,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 912 places, 5197 transitions, 191769 flow [2023-09-01 13:20:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-09-01 13:20:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-09-01 13:20:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4273 transitions. [2023-09-01 13:20:04,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009947447447447 [2023-09-01 13:20:04,066 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4273 transitions. [2023-09-01 13:20:04,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4273 transitions. [2023-09-01 13:20:04,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:20:04,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4273 transitions. [2023-09-01 13:20:04,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 59.34722222222222) internal successors, (4273), 72 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:04,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 148.0) internal successors, (10804), 73 states have internal predecessors, (10804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:04,080 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 148.0) internal successors, (10804), 73 states have internal predecessors, (10804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:04,080 INFO L175 Difference]: Start difference. First operand has 859 places, 4577 transitions, 166102 flow. Second operand 72 states and 4273 transitions. [2023-09-01 13:20:04,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 912 places, 5197 transitions, 191769 flow [2023-09-01 13:20:27,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 5197 transitions, 191121 flow, removed 273 selfloop flow, removed 26 redundant places. [2023-09-01 13:20:27,852 INFO L231 Difference]: Finished difference. Result has 907 places, 4791 transitions, 181727 flow [2023-09-01 13:20:27,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=165542, PETRI_DIFFERENCE_MINUEND_PLACES=815, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=181727, PETRI_PLACES=907, PETRI_TRANSITIONS=4791} [2023-09-01 13:20:27,856 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 885 predicate places. [2023-09-01 13:20:27,856 INFO L495 AbstractCegarLoop]: Abstraction has has 907 places, 4791 transitions, 181727 flow [2023-09-01 13:20:27,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 55.903225806451616) internal successors, (1733), 31 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:27,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:20:27,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:20:27,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 13:20:28,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:20:28,057 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:20:28,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:20:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1210939596, now seen corresponding path program 12 times [2023-09-01 13:20:28,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:20:28,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199519971] [2023-09-01 13:20:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:20:28,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:20:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:20:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:20:29,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:20:29,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199519971] [2023-09-01 13:20:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199519971] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:20:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753650102] [2023-09-01 13:20:29,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:20:29,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:20:29,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:20:29,168 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:20:29,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:20:29,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 13:20:29,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:20:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:20:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:20:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:20:30,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:20:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:20:32,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753650102] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:20:32,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:20:32,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-09-01 13:20:32,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765652438] [2023-09-01 13:20:32,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:20:32,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:20:32,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:20:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:20:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2023-09-01 13:20:33,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-09-01 13:20:33,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 907 places, 4791 transitions, 181727 flow. Second operand has 29 states, 29 states have (on average 56.03448275862069) internal successors, (1625), 29 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:20:33,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:20:33,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-09-01 13:20:33,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:21:48,478 INFO L130 PetriNetUnfolder]: 12210/21225 cut-off events. [2023-09-01 13:21:48,478 INFO L131 PetriNetUnfolder]: For 1071656/1071656 co-relation queries the response was YES. [2023-09-01 13:21:48,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297887 conditions, 21225 events. 12210/21225 cut-off events. For 1071656/1071656 co-relation queries the response was YES. Maximal size of possible extension queue 1307. Compared 174209 event pairs, 154 based on Foata normal form. 46/21271 useless extension candidates. Maximal degree in co-relation 297260. Up to 7255 conditions per place. [2023-09-01 13:21:48,938 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 1571 selfloop transitions, 4076 changer transitions 245/5892 dead transitions. [2023-09-01 13:21:48,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 5892 transitions, 227629 flow [2023-09-01 13:21:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-09-01 13:21:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-09-01 13:21:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5474 transitions. [2023-09-01 13:21:48,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39347326049453707 [2023-09-01 13:21:48,944 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5474 transitions. [2023-09-01 13:21:48,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5474 transitions. [2023-09-01 13:21:48,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:21:48,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5474 transitions. [2023-09-01 13:21:48,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 58.234042553191486) internal successors, (5474), 94 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:48,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 148.0) internal successors, (14060), 95 states have internal predecessors, (14060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:48,965 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 148.0) internal successors, (14060), 95 states have internal predecessors, (14060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:21:48,965 INFO L175 Difference]: Start difference. First operand has 907 places, 4791 transitions, 181727 flow. Second operand 94 states and 5474 transitions. [2023-09-01 13:21:48,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 5892 transitions, 227629 flow [2023-09-01 13:22:18,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 955 places, 5892 transitions, 226490 flow, removed 264 selfloop flow, removed 31 redundant places. [2023-09-01 13:22:18,912 INFO L231 Difference]: Finished difference. Result has 999 places, 5404 transitions, 216642 flow [2023-09-01 13:22:18,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=180974, PETRI_DIFFERENCE_MINUEND_PLACES=862, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=216642, PETRI_PLACES=999, PETRI_TRANSITIONS=5404} [2023-09-01 13:22:18,915 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 977 predicate places. [2023-09-01 13:22:18,915 INFO L495 AbstractCegarLoop]: Abstraction has has 999 places, 5404 transitions, 216642 flow [2023-09-01 13:22:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.03448275862069) internal successors, (1625), 29 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:18,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:22:18,916 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:22:18,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:22:19,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:19,117 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 13:22:19,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:22:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 826915340, now seen corresponding path program 13 times [2023-09-01 13:22:19,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:22:19,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303774015] [2023-09-01 13:22:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:22:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:22:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:22:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:22:20,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:22:20,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303774015] [2023-09-01 13:22:20,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303774015] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:22:20,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032243452] [2023-09-01 13:22:20,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:22:20,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:22:20,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:22:20,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:22:20,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:22:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:22:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 13:22:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:22:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:22:22,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:22:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:22:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032243452] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:22:27,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:22:27,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-09-01 13:22:27,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783343352] [2023-09-01 13:22:27,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:22:27,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 13:22:27,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:22:27,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 13:22:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=608, Unknown=1, NotChecked=0, Total=756 [2023-09-01 13:22:29,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-09-01 13:22:29,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 999 places, 5404 transitions, 216642 flow. Second operand has 28 states, 28 states have (on average 54.107142857142854) internal successors, (1515), 28 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:22:29,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:22:29,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-09-01 13:22:29,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:23:01,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 13:24:07,228 INFO L130 PetriNetUnfolder]: 13037/22604 cut-off events. [2023-09-01 13:24:07,228 INFO L131 PetriNetUnfolder]: For 1277838/1277838 co-relation queries the response was YES. [2023-09-01 13:24:07,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336789 conditions, 22604 events. 13037/22604 cut-off events. For 1277838/1277838 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 186816 event pairs, 30 based on Foata normal form. 34/22638 useless extension candidates. Maximal degree in co-relation 336289. Up to 8860 conditions per place. [2023-09-01 13:24:07,800 INFO L137 encePairwiseOnDemand]: 139/148 looper letters, 1809 selfloop transitions, 4223 changer transitions 255/6287 dead transitions. [2023-09-01 13:24:07,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1042 places, 6287 transitions, 257255 flow [2023-09-01 13:24:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 13:24:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 13:24:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3642 transitions. [2023-09-01 13:24:07,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845016891891892 [2023-09-01 13:24:07,804 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3642 transitions. [2023-09-01 13:24:07,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3642 transitions. [2023-09-01 13:24:07,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:24:07,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3642 transitions. [2023-09-01 13:24:07,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.90625) internal successors, (3642), 64 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:07,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 148.0) internal successors, (9620), 65 states have internal predecessors, (9620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:07,816 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 148.0) internal successors, (9620), 65 states have internal predecessors, (9620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:24:07,816 INFO L175 Difference]: Start difference. First operand has 999 places, 5404 transitions, 216642 flow. Second operand 64 states and 3642 transitions. [2023-09-01 13:24:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1042 places, 6287 transitions, 257255 flow Killed by 15