./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:45:38,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:45:38,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:45:38,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:45:38,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:45:38,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:45:38,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:45:38,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:45:38,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:45:38,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:45:38,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:45:38,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:45:38,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:45:38,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:45:38,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:45:38,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:45:38,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:45:38,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:45:38,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:45:38,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:45:38,244 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:45:38,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:45:38,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:45:38,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:45:38,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:45:38,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:45:38,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:45:38,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:45:38,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:45:38,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:45:38,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:45:38,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:45:38,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:45:38,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:45:38,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:45:38,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:45:38,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:45:38,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:45:38,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:45:38,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:45:38,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:45:38,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:45:38,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:45:38,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:45:38,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:45:38,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:45:38,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:45:38,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:45:38,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:45:38,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:45:38,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:45:38,287 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:45:38,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:45:38,288 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:45:38,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:45:38,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:45:38,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:45:38,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:45:38,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:45:38,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:45:38,289 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:45:38,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:45:38,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:45:38,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:45:38,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:45:38,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:45:38,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:45:38,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:45:38,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:45:38,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:45:38,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:45:38,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:45:38,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:45:38,291 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:45:38,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:45:38,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:45:38,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-07-22 21:45:38,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:45:38,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:45:38,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:45:38,502 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:45:38,503 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:45:38,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-07-22 21:45:38,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfac914ba/f9adc747f0d048ca9b5bc4bcb778ca2c/FLAGf4301ad74 [2022-07-22 21:45:38,893 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:45:38,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-07-22 21:45:38,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfac914ba/f9adc747f0d048ca9b5bc4bcb778ca2c/FLAGf4301ad74 [2022-07-22 21:45:39,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfac914ba/f9adc747f0d048ca9b5bc4bcb778ca2c [2022-07-22 21:45:39,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:45:39,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:45:39,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:45:39,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:45:39,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:45:39,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ab24ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39, skipping insertion in model container [2022-07-22 21:45:39,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:45:39,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:45:39,504 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-07-22 21:45:39,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:45:39,526 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:45:39,561 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-07-22 21:45:39,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:45:39,588 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:45:39,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39 WrapperNode [2022-07-22 21:45:39,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:45:39,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:45:39,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:45:39,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:45:39,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,633 INFO L137 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2022-07-22 21:45:39,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:45:39,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:45:39,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:45:39,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:45:39,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:45:39,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:45:39,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:45:39,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:45:39,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (1/1) ... [2022-07-22 21:45:39,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:45:39,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:45:39,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:45:39,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:45:39,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:45:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:45:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:45:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:45:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:45:39,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:45:39,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:45:39,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:45:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:45:39,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:45:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-22 21:45:39,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-22 21:45:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:45:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:45:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:45:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:45:39,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:45:39,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:45:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:45:39,731 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:45:39,829 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:45:39,830 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:45:40,177 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:45:40,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:45:40,261 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:45:40,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:40 BoogieIcfgContainer [2022-07-22 21:45:40,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:45:40,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:45:40,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:45:40,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:45:40,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:45:39" (1/3) ... [2022-07-22 21:45:40,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1343ce53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:40, skipping insertion in model container [2022-07-22 21:45:40,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:45:39" (2/3) ... [2022-07-22 21:45:40,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1343ce53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:45:40, skipping insertion in model container [2022-07-22 21:45:40,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:45:40" (3/3) ... [2022-07-22 21:45:40,268 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-07-22 21:45:40,272 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:45:40,278 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:45:40,278 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:45:40,279 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:45:40,330 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:45:40,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 247 transitions, 526 flow [2022-07-22 21:45:40,449 INFO L129 PetriNetUnfolder]: 19/243 cut-off events. [2022-07-22 21:45:40,449 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:45:40,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 243 events. 19/243 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2022-07-22 21:45:40,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 247 transitions, 526 flow [2022-07-22 21:45:40,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 230 transitions, 484 flow [2022-07-22 21:45:40,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:45:40,467 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec44657, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fb26412 [2022-07-22 21:45:40,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:45:40,490 INFO L129 PetriNetUnfolder]: 19/229 cut-off events. [2022-07-22 21:45:40,491 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:45:40,491 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:40,491 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:40,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash -22342228, now seen corresponding path program 1 times [2022-07-22 21:45:40,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:40,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197635331] [2022-07-22 21:45:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:40,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:40,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:40,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197635331] [2022-07-22 21:45:40,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197635331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:40,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:45:40,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:45:40,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892883603] [2022-07-22 21:45:40,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:45:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:45:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:45:40,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 247 [2022-07-22 21:45:40,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 230 transitions, 484 flow. Second operand has 2 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:40,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:40,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 247 [2022-07-22 21:45:40,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:40,981 INFO L129 PetriNetUnfolder]: 226/768 cut-off events. [2022-07-22 21:45:40,981 INFO L130 PetriNetUnfolder]: For 146/147 co-relation queries the response was YES. [2022-07-22 21:45:40,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 768 events. 226/768 cut-off events. For 146/147 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3364 event pairs, 121 based on Foata normal form. 198/879 useless extension candidates. Maximal degree in co-relation 906. Up to 306 conditions per place. [2022-07-22 21:45:40,991 INFO L132 encePairwiseOnDemand]: 234/247 looper letters, 14 selfloop transitions, 0 changer transitions 7/217 dead transitions. [2022-07-22 21:45:40,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 217 transitions, 486 flow [2022-07-22 21:45:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:45:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:45:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 465 transitions. [2022-07-22 21:45:41,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9412955465587044 [2022-07-22 21:45:41,006 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 465 transitions. [2022-07-22 21:45:41,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 465 transitions. [2022-07-22 21:45:41,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:41,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 465 transitions. [2022-07-22 21:45:41,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,019 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,020 INFO L186 Difference]: Start difference. First operand has 224 places, 230 transitions, 484 flow. Second operand 2 states and 465 transitions. [2022-07-22 21:45:41,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 217 transitions, 486 flow [2022-07-22 21:45:41,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 217 transitions, 470 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:45:41,029 INFO L242 Difference]: Finished difference. Result has 217 places, 210 transitions, 428 flow [2022-07-22 21:45:41,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=217, PETRI_TRANSITIONS=210} [2022-07-22 21:45:41,035 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-22 21:45:41,036 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 210 transitions, 428 flow [2022-07-22 21:45:41,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,036 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:41,037 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:41,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:45:41,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:41,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1261302060, now seen corresponding path program 1 times [2022-07-22 21:45:41,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:41,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754507090] [2022-07-22 21:45:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:41,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:41,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754507090] [2022-07-22 21:45:41,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754507090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:41,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:45:41,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:45:41,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655494378] [2022-07-22 21:45:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:41,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:45:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:45:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:45:41,483 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 247 [2022-07-22 21:45:41,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 210 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:41,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 247 [2022-07-22 21:45:41,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:41,783 INFO L129 PetriNetUnfolder]: 768/1413 cut-off events. [2022-07-22 21:45:41,783 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-22 21:45:41,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1413 events. 768/1413 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6588 event pairs, 30 based on Foata normal form. 0/1324 useless extension candidates. Maximal degree in co-relation 2632. Up to 669 conditions per place. [2022-07-22 21:45:41,794 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 66 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2022-07-22 21:45:41,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 231 transitions, 620 flow [2022-07-22 21:45:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:45:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:45:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1298 transitions. [2022-07-22 21:45:41,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7507229612492771 [2022-07-22 21:45:41,797 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1298 transitions. [2022-07-22 21:45:41,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1298 transitions. [2022-07-22 21:45:41,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:41,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1298 transitions. [2022-07-22 21:45:41,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.42857142857142) internal successors, (1298), 7 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,804 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,804 INFO L186 Difference]: Start difference. First operand has 217 places, 210 transitions, 428 flow. Second operand 7 states and 1298 transitions. [2022-07-22 21:45:41,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 231 transitions, 620 flow [2022-07-22 21:45:41,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 231 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:45:41,812 INFO L242 Difference]: Finished difference. Result has 217 places, 211 transitions, 448 flow [2022-07-22 21:45:41,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-07-22 21:45:41,813 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-22 21:45:41,813 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 448 flow [2022-07-22 21:45:41,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,814 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:41,814 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:41,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:45:41,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:41,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1722981983, now seen corresponding path program 1 times [2022-07-22 21:45:41,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:41,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920553133] [2022-07-22 21:45:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:41,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:41,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920553133] [2022-07-22 21:45:41,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920553133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:41,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:45:41,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:45:41,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501405079] [2022-07-22 21:45:41,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:41,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:45:41,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:41,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:45:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:45:41,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-22 21:45:41,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 448 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:41,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:41,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-22 21:45:41,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:42,218 INFO L129 PetriNetUnfolder]: 1288/2417 cut-off events. [2022-07-22 21:45:42,218 INFO L130 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2022-07-22 21:45:42,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 2417 events. 1288/2417 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14061 event pairs, 158 based on Foata normal form. 18/2250 useless extension candidates. Maximal degree in co-relation 4666. Up to 1064 conditions per place. [2022-07-22 21:45:42,236 INFO L132 encePairwiseOnDemand]: 242/247 looper letters, 58 selfloop transitions, 4 changer transitions 0/246 dead transitions. [2022-07-22 21:45:42,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 246 transitions, 675 flow [2022-07-22 21:45:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:45:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:45:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1095 transitions. [2022-07-22 21:45:42,239 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8866396761133604 [2022-07-22 21:45:42,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1095 transitions. [2022-07-22 21:45:42,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1095 transitions. [2022-07-22 21:45:42,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:42,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1095 transitions. [2022-07-22 21:45:42,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:42,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:42,244 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:42,244 INFO L186 Difference]: Start difference. First operand has 217 places, 211 transitions, 448 flow. Second operand 5 states and 1095 transitions. [2022-07-22 21:45:42,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 246 transitions, 675 flow [2022-07-22 21:45:42,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 246 transitions, 661 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:45:42,266 INFO L242 Difference]: Finished difference. Result has 218 places, 213 transitions, 463 flow [2022-07-22 21:45:42,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=218, PETRI_TRANSITIONS=213} [2022-07-22 21:45:42,268 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -6 predicate places. [2022-07-22 21:45:42,268 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 213 transitions, 463 flow [2022-07-22 21:45:42,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:42,269 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:42,269 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:42,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:45:42,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 273955145, now seen corresponding path program 2 times [2022-07-22 21:45:42,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:42,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735747141] [2022-07-22 21:45:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:42,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:42,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:42,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735747141] [2022-07-22 21:45:42,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735747141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:45:42,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658921759] [2022-07-22 21:45:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:45:42,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:45:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:45:42,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:45:42,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:45:42,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:45:42,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:45:42,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:45:42,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:45:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:42,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:45:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:42,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658921759] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:45:42,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:45:42,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:45:42,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677095481] [2022-07-22 21:45:42,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:42,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:45:42,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:45:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:45:42,975 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 247 [2022-07-22 21:45:42,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 213 transitions, 463 flow. Second operand has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:42,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:42,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 247 [2022-07-22 21:45:42,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:43,335 INFO L129 PetriNetUnfolder]: 1220/2724 cut-off events. [2022-07-22 21:45:43,335 INFO L130 PetriNetUnfolder]: For 609/609 co-relation queries the response was YES. [2022-07-22 21:45:43,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5058 conditions, 2724 events. 1220/2724 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17722 event pairs, 215 based on Foata normal form. 35/2572 useless extension candidates. Maximal degree in co-relation 5051. Up to 455 conditions per place. [2022-07-22 21:45:43,351 INFO L132 encePairwiseOnDemand]: 238/247 looper letters, 82 selfloop transitions, 10 changer transitions 0/254 dead transitions. [2022-07-22 21:45:43,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 254 transitions, 759 flow [2022-07-22 21:45:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:45:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:45:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1497 transitions. [2022-07-22 21:45:43,354 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7575910931174089 [2022-07-22 21:45:43,354 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1497 transitions. [2022-07-22 21:45:43,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1497 transitions. [2022-07-22 21:45:43,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:43,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1497 transitions. [2022-07-22 21:45:43,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:43,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:43,360 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:43,360 INFO L186 Difference]: Start difference. First operand has 218 places, 213 transitions, 463 flow. Second operand 8 states and 1497 transitions. [2022-07-22 21:45:43,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 254 transitions, 759 flow [2022-07-22 21:45:43,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 254 transitions, 753 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:45:43,365 INFO L242 Difference]: Finished difference. Result has 227 places, 220 transitions, 523 flow [2022-07-22 21:45:43,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=523, PETRI_PLACES=227, PETRI_TRANSITIONS=220} [2022-07-22 21:45:43,366 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 3 predicate places. [2022-07-22 21:45:43,366 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 220 transitions, 523 flow [2022-07-22 21:45:43,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:43,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:43,366 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:43,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:45:43,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:45:43,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1178444087, now seen corresponding path program 3 times [2022-07-22 21:45:43,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733121845] [2022-07-22 21:45:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:43,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:43,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733121845] [2022-07-22 21:45:43,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733121845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:43,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:45:43,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:45:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027364603] [2022-07-22 21:45:43,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:45:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:45:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:45:43,685 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-22 21:45:43,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 220 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:43,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:43,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-22 21:45:43,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:44,877 INFO L129 PetriNetUnfolder]: 4916/9783 cut-off events. [2022-07-22 21:45:44,877 INFO L130 PetriNetUnfolder]: For 4883/4900 co-relation queries the response was YES. [2022-07-22 21:45:44,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21837 conditions, 9783 events. 4916/9783 cut-off events. For 4883/4900 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 83346 event pairs, 906 based on Foata normal form. 80/9460 useless extension candidates. Maximal degree in co-relation 21826. Up to 2240 conditions per place. [2022-07-22 21:45:44,963 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 97 selfloop transitions, 26 changer transitions 0/307 dead transitions. [2022-07-22 21:45:44,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 307 transitions, 1136 flow [2022-07-22 21:45:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:45:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:45:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1537 transitions. [2022-07-22 21:45:44,966 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8889531521110469 [2022-07-22 21:45:44,966 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1537 transitions. [2022-07-22 21:45:44,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1537 transitions. [2022-07-22 21:45:44,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:44,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1537 transitions. [2022-07-22 21:45:44,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.57142857142858) internal successors, (1537), 7 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:44,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:44,972 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:44,972 INFO L186 Difference]: Start difference. First operand has 227 places, 220 transitions, 523 flow. Second operand 7 states and 1537 transitions. [2022-07-22 21:45:44,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 307 transitions, 1136 flow [2022-07-22 21:45:44,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 307 transitions, 1131 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:45:44,983 INFO L242 Difference]: Finished difference. Result has 235 places, 243 transitions, 746 flow [2022-07-22 21:45:44,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=235, PETRI_TRANSITIONS=243} [2022-07-22 21:45:44,985 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 11 predicate places. [2022-07-22 21:45:44,985 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 243 transitions, 746 flow [2022-07-22 21:45:44,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:44,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:44,987 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:44,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:45:44,987 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:44,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1298721201, now seen corresponding path program 4 times [2022-07-22 21:45:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:44,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444699452] [2022-07-22 21:45:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:44,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:45,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:45,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444699452] [2022-07-22 21:45:45,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444699452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:45:45,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037858199] [2022-07-22 21:45:45,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:45:45,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:45:45,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:45:45,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:45:45,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:45:45,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:45:45,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:45:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:45:45,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:45:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:45,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:45:45,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037858199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:45,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:45:45,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-07-22 21:45:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39702174] [2022-07-22 21:45:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:45:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:45:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:45:45,409 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-22 21:45:45,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 243 transitions, 746 flow. Second operand has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:45,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:45,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-22 21:45:45,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:46,093 INFO L129 PetriNetUnfolder]: 2037/5163 cut-off events. [2022-07-22 21:45:46,094 INFO L130 PetriNetUnfolder]: For 6534/7827 co-relation queries the response was YES. [2022-07-22 21:45:46,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13229 conditions, 5163 events. 2037/5163 cut-off events. For 6534/7827 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 42769 event pairs, 859 based on Foata normal form. 205/4999 useless extension candidates. Maximal degree in co-relation 13213. Up to 2472 conditions per place. [2022-07-22 21:45:46,132 INFO L132 encePairwiseOnDemand]: 236/247 looper letters, 44 selfloop transitions, 8 changer transitions 20/267 dead transitions. [2022-07-22 21:45:46,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 267 transitions, 942 flow [2022-07-22 21:45:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:45:46,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:45:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1803 transitions. [2022-07-22 21:45:46,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8110661268556005 [2022-07-22 21:45:46,137 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1803 transitions. [2022-07-22 21:45:46,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1803 transitions. [2022-07-22 21:45:46,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:46,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1803 transitions. [2022-07-22 21:45:46,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.33333333333334) internal successors, (1803), 9 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:46,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:46,144 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:46,144 INFO L186 Difference]: Start difference. First operand has 235 places, 243 transitions, 746 flow. Second operand 9 states and 1803 transitions. [2022-07-22 21:45:46,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 267 transitions, 942 flow [2022-07-22 21:45:46,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 267 transitions, 942 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:45:46,159 INFO L242 Difference]: Finished difference. Result has 245 places, 244 transitions, 778 flow [2022-07-22 21:45:46,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=245, PETRI_TRANSITIONS=244} [2022-07-22 21:45:46,160 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 21 predicate places. [2022-07-22 21:45:46,161 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 244 transitions, 778 flow [2022-07-22 21:45:46,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:46,161 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:46,161 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:46,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:45:46,375 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,SelfDestructingSolverStorable5 [2022-07-22 21:45:46,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash -629110740, now seen corresponding path program 1 times [2022-07-22 21:45:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:46,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849897383] [2022-07-22 21:45:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:45:46,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849897383] [2022-07-22 21:45:46,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849897383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:45:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180762544] [2022-07-22 21:45:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:46,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:45:46,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:45:46,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:45:46,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:45:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:45:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:45:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:45:46,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:45:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:45:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180762544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:45:47,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:45:47,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 10] total 19 [2022-07-22 21:45:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803926514] [2022-07-22 21:45:47,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:45:47,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:45:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:45:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:45:47,107 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 247 [2022-07-22 21:45:47,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 244 transitions, 778 flow. Second operand has 19 states, 19 states have (on average 177.57894736842104) internal successors, (3374), 19 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:47,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:47,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 247 [2022-07-22 21:45:47,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:50,302 INFO L129 PetriNetUnfolder]: 11735/23121 cut-off events. [2022-07-22 21:45:50,303 INFO L130 PetriNetUnfolder]: For 26101/26176 co-relation queries the response was YES. [2022-07-22 21:45:50,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58744 conditions, 23121 events. 11735/23121 cut-off events. For 26101/26176 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 224593 event pairs, 440 based on Foata normal form. 144/22012 useless extension candidates. Maximal degree in co-relation 58725. Up to 3349 conditions per place. [2022-07-22 21:45:50,529 INFO L132 encePairwiseOnDemand]: 234/247 looper letters, 292 selfloop transitions, 162 changer transitions 2/613 dead transitions. [2022-07-22 21:45:50,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 613 transitions, 3657 flow [2022-07-22 21:45:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 21:45:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-22 21:45:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4265 transitions. [2022-07-22 21:45:50,536 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7507481077275128 [2022-07-22 21:45:50,536 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4265 transitions. [2022-07-22 21:45:50,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4265 transitions. [2022-07-22 21:45:50,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:50,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4265 transitions. [2022-07-22 21:45:50,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 185.43478260869566) internal successors, (4265), 23 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:50,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:50,551 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:50,551 INFO L186 Difference]: Start difference. First operand has 245 places, 244 transitions, 778 flow. Second operand 23 states and 4265 transitions. [2022-07-22 21:45:50,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 613 transitions, 3657 flow [2022-07-22 21:45:50,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 613 transitions, 3621 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-22 21:45:50,598 INFO L242 Difference]: Finished difference. Result has 271 places, 419 transitions, 2567 flow [2022-07-22 21:45:50,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2567, PETRI_PLACES=271, PETRI_TRANSITIONS=419} [2022-07-22 21:45:50,599 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 47 predicate places. [2022-07-22 21:45:50,600 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 419 transitions, 2567 flow [2022-07-22 21:45:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 177.57894736842104) internal successors, (3374), 19 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:50,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:50,601 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:50,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:45:50,815 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 [2022-07-22 21:45:50,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1426988084, now seen corresponding path program 2 times [2022-07-22 21:45:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965893756] [2022-07-22 21:45:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:50,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:45:50,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:50,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965893756] [2022-07-22 21:45:50,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965893756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:50,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:45:50,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:45:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013156435] [2022-07-22 21:45:50,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:50,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:45:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:45:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:45:50,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 247 [2022-07-22 21:45:50,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 419 transitions, 2567 flow. Second operand has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:50,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:50,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 247 [2022-07-22 21:45:50,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:54,819 INFO L129 PetriNetUnfolder]: 14780/27656 cut-off events. [2022-07-22 21:45:54,819 INFO L130 PetriNetUnfolder]: For 75441/78029 co-relation queries the response was YES. [2022-07-22 21:45:54,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90985 conditions, 27656 events. 14780/27656 cut-off events. For 75441/78029 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 263958 event pairs, 1738 based on Foata normal form. 602/26876 useless extension candidates. Maximal degree in co-relation 90956. Up to 9395 conditions per place. [2022-07-22 21:45:55,163 INFO L132 encePairwiseOnDemand]: 239/247 looper letters, 285 selfloop transitions, 166 changer transitions 0/632 dead transitions. [2022-07-22 21:45:55,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 632 transitions, 5141 flow [2022-07-22 21:45:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:45:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:45:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1507 transitions. [2022-07-22 21:45:55,170 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.871602082128398 [2022-07-22 21:45:55,171 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1507 transitions. [2022-07-22 21:45:55,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1507 transitions. [2022-07-22 21:45:55,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:55,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1507 transitions. [2022-07-22 21:45:55,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.28571428571428) internal successors, (1507), 7 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:55,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:55,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:55,177 INFO L186 Difference]: Start difference. First operand has 271 places, 419 transitions, 2567 flow. Second operand 7 states and 1507 transitions. [2022-07-22 21:45:55,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 632 transitions, 5141 flow [2022-07-22 21:45:55,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 632 transitions, 5079 flow, removed 31 selfloop flow, removed 0 redundant places. [2022-07-22 21:45:55,812 INFO L242 Difference]: Finished difference. Result has 281 places, 493 transitions, 3898 flow [2022-07-22 21:45:55,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3898, PETRI_PLACES=281, PETRI_TRANSITIONS=493} [2022-07-22 21:45:55,813 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 57 predicate places. [2022-07-22 21:45:55,814 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 493 transitions, 3898 flow [2022-07-22 21:45:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:55,814 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:55,815 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:55,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:45:55,815 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:45:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1444538644, now seen corresponding path program 3 times [2022-07-22 21:45:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:55,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867146413] [2022-07-22 21:45:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:55,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:45:55,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:55,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867146413] [2022-07-22 21:45:55,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867146413] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:45:55,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:45:55,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:45:55,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271721568] [2022-07-22 21:45:55,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:45:55,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:45:55,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:55,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:45:55,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:45:55,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-22 21:45:55,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 493 transitions, 3898 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:55,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:55,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-22 21:45:55,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:59,960 INFO L129 PetriNetUnfolder]: 15535/27948 cut-off events. [2022-07-22 21:45:59,960 INFO L130 PetriNetUnfolder]: For 103597/105179 co-relation queries the response was YES. [2022-07-22 21:46:00,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102912 conditions, 27948 events. 15535/27948 cut-off events. For 103597/105179 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 255952 event pairs, 1007 based on Foata normal form. 458/27492 useless extension candidates. Maximal degree in co-relation 102878. Up to 6111 conditions per place. [2022-07-22 21:46:00,423 INFO L132 encePairwiseOnDemand]: 239/247 looper letters, 329 selfloop transitions, 136 changer transitions 0/650 dead transitions. [2022-07-22 21:46:00,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 650 transitions, 6270 flow [2022-07-22 21:46:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:46:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:46:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1319 transitions. [2022-07-22 21:46:00,426 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8900134952766532 [2022-07-22 21:46:00,426 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1319 transitions. [2022-07-22 21:46:00,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1319 transitions. [2022-07-22 21:46:00,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:00,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1319 transitions. [2022-07-22 21:46:00,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.83333333333334) internal successors, (1319), 6 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,432 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:00,432 INFO L186 Difference]: Start difference. First operand has 281 places, 493 transitions, 3898 flow. Second operand 6 states and 1319 transitions. [2022-07-22 21:46:00,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 650 transitions, 6270 flow [2022-07-22 21:46:01,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 650 transitions, 6240 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-22 21:46:01,151 INFO L242 Difference]: Finished difference. Result has 290 places, 525 transitions, 4824 flow [2022-07-22 21:46:01,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4824, PETRI_PLACES=290, PETRI_TRANSITIONS=525} [2022-07-22 21:46:01,152 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 66 predicate places. [2022-07-22 21:46:01,152 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 525 transitions, 4824 flow [2022-07-22 21:46:01,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:01,153 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:01,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:46:01,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:46:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1433283384, now seen corresponding path program 4 times [2022-07-22 21:46:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:01,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898671876] [2022-07-22 21:46:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:01,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:46:01,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898671876] [2022-07-22 21:46:01,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898671876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:01,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:01,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 21:46:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028182035] [2022-07-22 21:46:01,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:01,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:46:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:46:01,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:46:01,238 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-22 21:46:01,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 525 transitions, 4824 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:01,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:01,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-22 21:46:01,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:05,373 INFO L129 PetriNetUnfolder]: 15233/27247 cut-off events. [2022-07-22 21:46:05,373 INFO L130 PetriNetUnfolder]: For 130336/132001 co-relation queries the response was YES. [2022-07-22 21:46:05,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107423 conditions, 27247 events. 15233/27247 cut-off events. For 130336/132001 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 246417 event pairs, 531 based on Foata normal form. 280/26579 useless extension candidates. Maximal degree in co-relation 107384. Up to 7933 conditions per place. [2022-07-22 21:46:05,727 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 304 selfloop transitions, 86 changer transitions 0/575 dead transitions. [2022-07-22 21:46:05,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 575 transitions, 5991 flow [2022-07-22 21:46:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 21:46:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-22 21:46:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1102 transitions. [2022-07-22 21:46:05,729 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8923076923076924 [2022-07-22 21:46:05,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1102 transitions. [2022-07-22 21:46:05,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1102 transitions. [2022-07-22 21:46:05,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:05,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1102 transitions. [2022-07-22 21:46:05,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.4) internal successors, (1102), 5 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:05,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:05,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:05,733 INFO L186 Difference]: Start difference. First operand has 290 places, 525 transitions, 4824 flow. Second operand 5 states and 1102 transitions. [2022-07-22 21:46:05,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 575 transitions, 5991 flow [2022-07-22 21:46:07,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 575 transitions, 5927 flow, removed 32 selfloop flow, removed 0 redundant places. [2022-07-22 21:46:07,158 INFO L242 Difference]: Finished difference. Result has 297 places, 528 transitions, 5165 flow [2022-07-22 21:46:07,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5165, PETRI_PLACES=297, PETRI_TRANSITIONS=528} [2022-07-22 21:46:07,159 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 73 predicate places. [2022-07-22 21:46:07,159 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 528 transitions, 5165 flow [2022-07-22 21:46:07,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:07,160 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:07,160 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:46:07,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:46:07,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:46:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash 139212771, now seen corresponding path program 1 times [2022-07-22 21:46:07,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:07,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682654651] [2022-07-22 21:46:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:07,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:07,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682654651] [2022-07-22 21:46:07,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682654651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175048419] [2022-07-22 21:46:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:07,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:07,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:07,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:07,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:46:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 21:46:08,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:09,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:46:09,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:10,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:10,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:10,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:46:10,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-22 21:46:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:10,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:12,442 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:46:12,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 61 [2022-07-22 21:46:12,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5131 treesize of output 5003 [2022-07-22 21:46:12,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5003 treesize of output 4619 [2022-07-22 21:46:12,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2407 treesize of output 2215 [2022-07-22 21:46:12,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4427 treesize of output 3659 [2022-07-22 21:46:12,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3659 treesize of output 3563