./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-dot-product.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-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:46:14,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:46:14,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:46:14,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:46:14,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:46:14,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:46:14,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:46:14,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:46:14,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:46:14,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:46:14,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:46:14,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:46:14,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:46:14,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:46:14,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:46:14,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:46:14,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:46:14,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:46:14,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:46:14,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:46:14,443 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:46:14,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:46:14,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:46:14,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:46:14,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:46:14,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:46:14,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:46:14,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:46:14,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:46:14,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:46:14,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:46:14,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:46:14,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:46:14,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:46:14,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:46:14,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:46:14,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:46:14,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:46:14,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:46:14,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:46:14,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:46:14,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:46:14,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:46:14,495 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:46:14,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:46:14,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:46:14,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:46:14,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:46:14,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:46:14,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:46:14,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:46:14,498 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:46:14,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:46:14,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:46:14,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:46:14,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:46:14,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:46:14,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:46:14,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:46:14,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:46:14,500 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:46:14,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:46:14,501 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:46:14,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:46:14,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:46:14,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:46:14,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:46:14,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:46:14,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:46:14,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:46:14,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:46:14,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:46:14,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:46:14,508 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:46:14,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:46:14,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:46:14,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 [2022-07-22 21:46:14,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:46:14,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:46:14,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:46:14,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:46:14,785 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:46:14,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-07-22 21:46:14,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846833c10/fa20faafe4454d5a8ebaf7626251d8b9/FLAG5d5e4d1e6 [2022-07-22 21:46:15,210 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:46:15,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-07-22 21:46:15,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846833c10/fa20faafe4454d5a8ebaf7626251d8b9/FLAG5d5e4d1e6 [2022-07-22 21:46:15,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846833c10/fa20faafe4454d5a8ebaf7626251d8b9 [2022-07-22 21:46:15,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:46:15,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:46:15,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:46:15,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:46:15,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:46:15,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9597f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15, skipping insertion in model container [2022-07-22 21:46:15,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:46:15,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:46:15,477 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-dot-product.wvr.c[2865,2878] [2022-07-22 21:46:15,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:46:15,501 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:46:15,540 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-dot-product.wvr.c[2865,2878] [2022-07-22 21:46:15,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:46:15,564 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:46:15,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15 WrapperNode [2022-07-22 21:46:15,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:46:15,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:46:15,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:46:15,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:46:15,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,591 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,618 INFO L137 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 275 [2022-07-22 21:46:15,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:46:15,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:46:15,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:46:15,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:46:15,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:46:15,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:46:15,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:46:15,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:46:15,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (1/1) ... [2022-07-22 21:46:15,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:46:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:15,696 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 21:46:15,698 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 21:46:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:46:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:46:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:46:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:46:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:46:15,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:46:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:46:15,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:46:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:46:15,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:46:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:46:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:46:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:46:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:46:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:46:15,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:46:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:46:15,728 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 21:46:15,810 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:46:15,811 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:46:16,204 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:46:16,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:46:16,350 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-22 21:46:16,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:46:16 BoogieIcfgContainer [2022-07-22 21:46:16,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:46:16,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:46:16,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:46:16,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:46:16,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:46:15" (1/3) ... [2022-07-22 21:46:16,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd0533a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:46:16, skipping insertion in model container [2022-07-22 21:46:16,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:46:15" (2/3) ... [2022-07-22 21:46:16,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd0533a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:46:16, skipping insertion in model container [2022-07-22 21:46:16,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:46:16" (3/3) ... [2022-07-22 21:46:16,363 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2022-07-22 21:46:16,369 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:46:16,378 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:46:16,378 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:46:16,379 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:46:16,492 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:46:16,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 538 flow [2022-07-22 21:46:16,654 INFO L129 PetriNetUnfolder]: 25/254 cut-off events. [2022-07-22 21:46:16,654 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:46:16,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 254 events. 25/254 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-07-22 21:46:16,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 257 transitions, 538 flow [2022-07-22 21:46:16,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 504 flow [2022-07-22 21:46:16,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:46:16,687 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@2ec67f55, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42ffe659 [2022-07-22 21:46:16,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:46:16,725 INFO L129 PetriNetUnfolder]: 25/242 cut-off events. [2022-07-22 21:46:16,725 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:46:16,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:16,726 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] [2022-07-22 21:46:16,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:16,731 INFO L85 PathProgramCache]: Analyzing trace with hash -689798278, now seen corresponding path program 1 times [2022-07-22 21:46:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:16,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39563130] [2022-07-22 21:46:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:16,997 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 21:46:16,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:16,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39563130] [2022-07-22 21:46:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39563130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:16,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:17,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:46:17,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835432503] [2022-07-22 21:46:17,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:17,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:46:17,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:46:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:46:17,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 257 [2022-07-22 21:46:17,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 243 transitions, 504 flow. Second operand has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 0 states have call successors, (0), 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 21:46:17,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:17,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 257 [2022-07-22 21:46:17,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:17,153 INFO L129 PetriNetUnfolder]: 31/379 cut-off events. [2022-07-22 21:46:17,154 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-22 21:46:17,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 379 events. 31/379 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1238 event pairs, 15 based on Foata normal form. 64/407 useless extension candidates. Maximal degree in co-relation 267. Up to 37 conditions per place. [2022-07-22 21:46:17,162 INFO L132 encePairwiseOnDemand]: 240/257 looper letters, 9 selfloop transitions, 0 changer transitions 6/226 dead transitions. [2022-07-22 21:46:17,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 226 transitions, 488 flow [2022-07-22 21:46:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:46:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:46:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 486 transitions. [2022-07-22 21:46:17,179 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9455252918287937 [2022-07-22 21:46:17,179 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 486 transitions. [2022-07-22 21:46:17,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 486 transitions. [2022-07-22 21:46:17,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:17,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 486 transitions. [2022-07-22 21:46:17,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 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 21:46:17,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 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 21:46:17,199 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 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 21:46:17,201 INFO L186 Difference]: Start difference. First operand has 228 places, 243 transitions, 504 flow. Second operand 2 states and 486 transitions. [2022-07-22 21:46:17,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 226 transitions, 488 flow [2022-07-22 21:46:17,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 476 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:46:17,214 INFO L242 Difference]: Finished difference. Result has 223 places, 220 transitions, 446 flow [2022-07-22 21:46:17,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=446, PETRI_PLACES=223, PETRI_TRANSITIONS=220} [2022-07-22 21:46:17,220 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, -5 predicate places. [2022-07-22 21:46:17,220 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 220 transitions, 446 flow [2022-07-22 21:46:17,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 0 states have call successors, (0), 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 21:46:17,221 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:17,222 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] [2022-07-22 21:46:17,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:46:17,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash 65737028, now seen corresponding path program 1 times [2022-07-22 21:46:17,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:17,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584469953] [2022-07-22 21:46:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:17,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:17,488 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 21:46:17,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584469953] [2022-07-22 21:46:17,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584469953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:17,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:17,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:46:17,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89778754] [2022-07-22 21:46:17,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:17,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:46:17,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:46:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:46:17,494 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 257 [2022-07-22 21:46:17,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 220 transitions, 446 flow. Second operand has 8 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 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 21:46:17,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:17,496 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 257 [2022-07-22 21:46:17,496 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:17,890 INFO L129 PetriNetUnfolder]: 324/1335 cut-off events. [2022-07-22 21:46:17,890 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-22 21:46:17,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 1335 events. 324/1335 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8391 event pairs, 167 based on Foata normal form. 1/1076 useless extension candidates. Maximal degree in co-relation 1821. Up to 418 conditions per place. [2022-07-22 21:46:17,906 INFO L132 encePairwiseOnDemand]: 245/257 looper letters, 60 selfloop transitions, 8 changer transitions 22/246 dead transitions. [2022-07-22 21:46:17,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 246 transitions, 678 flow [2022-07-22 21:46:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:46:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:46:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1950 transitions. [2022-07-22 21:46:17,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6897771489211177 [2022-07-22 21:46:17,913 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1950 transitions. [2022-07-22 21:46:17,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1950 transitions. [2022-07-22 21:46:17,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:17,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1950 transitions. [2022-07-22 21:46:17,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 177.27272727272728) internal successors, (1950), 11 states have internal predecessors, (1950), 0 states have call successors, (0), 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 21:46:17,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 21:46:17,929 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 21:46:17,929 INFO L186 Difference]: Start difference. First operand has 223 places, 220 transitions, 446 flow. Second operand 11 states and 1950 transitions. [2022-07-22 21:46:17,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 246 transitions, 678 flow [2022-07-22 21:46:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 246 transitions, 678 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:46:17,941 INFO L242 Difference]: Finished difference. Result has 231 places, 221 transitions, 478 flow [2022-07-22 21:46:17,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=478, PETRI_PLACES=231, PETRI_TRANSITIONS=221} [2022-07-22 21:46:17,942 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 3 predicate places. [2022-07-22 21:46:17,943 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 221 transitions, 478 flow [2022-07-22 21:46:17,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 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 21:46:17,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:17,944 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] [2022-07-22 21:46:17,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:46:17,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:17,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1792910433, now seen corresponding path program 1 times [2022-07-22 21:46:17,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:17,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692808718] [2022-07-22 21:46:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:17,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:18,107 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 21:46:18,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692808718] [2022-07-22 21:46:18,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692808718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:18,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972461733] [2022-07-22 21:46:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:18,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:18,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:18,111 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 21:46:18,141 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 21:46:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:18,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:46:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:18,477 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 21:46:18,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:18,720 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 21:46:18,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972461733] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:18,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:46:18,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:46:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401619896] [2022-07-22 21:46:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:18,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:46:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:46:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:46:18,726 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 257 [2022-07-22 21:46:18,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 221 transitions, 478 flow. Second operand has 7 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 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 21:46:18,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:18,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 257 [2022-07-22 21:46:18,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:18,922 INFO L129 PetriNetUnfolder]: 166/758 cut-off events. [2022-07-22 21:46:18,923 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-22 21:46:18,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 758 events. 166/758 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4157 event pairs, 45 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 1086. Up to 161 conditions per place. [2022-07-22 21:46:18,929 INFO L132 encePairwiseOnDemand]: 249/257 looper letters, 47 selfloop transitions, 7 changer transitions 0/229 dead transitions. [2022-07-22 21:46:18,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 229 transitions, 604 flow [2022-07-22 21:46:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:46:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:46:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1412 transitions. [2022-07-22 21:46:18,933 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7848804891606448 [2022-07-22 21:46:18,934 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1412 transitions. [2022-07-22 21:46:18,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1412 transitions. [2022-07-22 21:46:18,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:18,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1412 transitions. [2022-07-22 21:46:18,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.71428571428572) internal successors, (1412), 7 states have internal predecessors, (1412), 0 states have call successors, (0), 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 21:46:18,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 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 21:46:18,942 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 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 21:46:18,942 INFO L186 Difference]: Start difference. First operand has 231 places, 221 transitions, 478 flow. Second operand 7 states and 1412 transitions. [2022-07-22 21:46:18,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 229 transitions, 604 flow [2022-07-22 21:46:18,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 229 transitions, 582 flow, removed 3 selfloop flow, removed 8 redundant places. [2022-07-22 21:46:18,948 INFO L242 Difference]: Finished difference. Result has 228 places, 223 transitions, 489 flow [2022-07-22 21:46:18,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=228, PETRI_TRANSITIONS=223} [2022-07-22 21:46:18,951 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 0 predicate places. [2022-07-22 21:46:18,951 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 223 transitions, 489 flow [2022-07-22 21:46:18,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 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 21:46:18,952 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:18,952 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] [2022-07-22 21:46:18,979 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 21:46:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:19,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:19,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1770742449, now seen corresponding path program 1 times [2022-07-22 21:46:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:19,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414925101] [2022-07-22 21:46:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:19,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:19,300 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 21:46:19,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:19,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414925101] [2022-07-22 21:46:19,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414925101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:19,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39963111] [2022-07-22 21:46:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:19,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:19,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:19,303 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 21:46:19,316 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 21:46:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:19,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:46:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:19,614 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 21:46:19,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:19,837 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 21:46:19,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39963111] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:19,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:46:19,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-22 21:46:19,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594159174] [2022-07-22 21:46:19,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:19,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:46:19,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:46:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:46:19,846 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 257 [2022-07-22 21:46:19,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 223 transitions, 489 flow. Second operand has 9 states, 9 states have (on average 189.11111111111111) internal successors, (1702), 9 states have internal predecessors, (1702), 0 states have call successors, (0), 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 21:46:19,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:19,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 257 [2022-07-22 21:46:19,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:20,414 INFO L129 PetriNetUnfolder]: 1013/2871 cut-off events. [2022-07-22 21:46:20,415 INFO L130 PetriNetUnfolder]: For 620/880 co-relation queries the response was YES. [2022-07-22 21:46:20,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 2871 events. 1013/2871 cut-off events. For 620/880 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22285 event pairs, 119 based on Foata normal form. 260/2733 useless extension candidates. Maximal degree in co-relation 4812. Up to 475 conditions per place. [2022-07-22 21:46:20,438 INFO L132 encePairwiseOnDemand]: 245/257 looper letters, 96 selfloop transitions, 19 changer transitions 0/281 dead transitions. [2022-07-22 21:46:20,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 281 transitions, 884 flow [2022-07-22 21:46:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:46:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:46:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2144 transitions. [2022-07-22 21:46:20,443 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.758401131941988 [2022-07-22 21:46:20,444 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2144 transitions. [2022-07-22 21:46:20,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2144 transitions. [2022-07-22 21:46:20,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:20,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2144 transitions. [2022-07-22 21:46:20,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.9090909090909) internal successors, (2144), 11 states have internal predecessors, (2144), 0 states have call successors, (0), 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 21:46:20,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 21:46:20,454 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 21:46:20,455 INFO L186 Difference]: Start difference. First operand has 228 places, 223 transitions, 489 flow. Second operand 11 states and 2144 transitions. [2022-07-22 21:46:20,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 281 transitions, 884 flow [2022-07-22 21:46:20,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 281 transitions, 871 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:20,461 INFO L242 Difference]: Finished difference. Result has 240 places, 235 transitions, 588 flow [2022-07-22 21:46:20,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=588, PETRI_PLACES=240, PETRI_TRANSITIONS=235} [2022-07-22 21:46:20,463 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 12 predicate places. [2022-07-22 21:46:20,463 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 235 transitions, 588 flow [2022-07-22 21:46:20,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.11111111111111) internal successors, (1702), 9 states have internal predecessors, (1702), 0 states have call successors, (0), 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 21:46:20,466 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:20,466 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] [2022-07-22 21:46:20,492 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 21:46:20,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 21:46:20,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash -655470049, now seen corresponding path program 2 times [2022-07-22 21:46:20,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:20,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729053256] [2022-07-22 21:46:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:20,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:20,836 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 21:46:20,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729053256] [2022-07-22 21:46:20,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729053256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:20,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187920999] [2022-07-22 21:46:20,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:46:20,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:20,838 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 21:46:20,840 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 21:46:20,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:46:20,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:46:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:46:21,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:46:21,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187920999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:21,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:46:21,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-22 21:46:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006827840] [2022-07-22 21:46:21,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:21,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:46:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:46:21,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:46:21,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 257 [2022-07-22 21:46:21,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 235 transitions, 588 flow. Second operand has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 states have internal predecessors, (1220), 0 states have call successors, (0), 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 21:46:21,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:21,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 257 [2022-07-22 21:46:21,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:21,581 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 2191#(= ~res1~0 0), 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 5#L101-4true, 171#L75-4true, 180#thread1ENTRYtrue, 245#true, 279#(<= 1 ~N~0), Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-22 21:46:21,581 INFO L384 tUnfolder$Statistics]: this new event has 169 ancestors and is cut-off event [2022-07-22 21:46:21,582 INFO L387 tUnfolder$Statistics]: existing Event has 160 ancestors and is cut-off event [2022-07-22 21:46:21,582 INFO L387 tUnfolder$Statistics]: existing Event has 153 ancestors and is cut-off event [2022-07-22 21:46:21,582 INFO L387 tUnfolder$Statistics]: existing Event has 153 ancestors and is cut-off event [2022-07-22 21:46:21,617 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 279#(<= 1 ~N~0), Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), 113#L54true, Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 5#L101-4true, 2148#true, 171#L75-4true, 245#true, Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-22 21:46:21,618 INFO L384 tUnfolder$Statistics]: this new event has 184 ancestors and is cut-off event [2022-07-22 21:46:21,618 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-22 21:46:21,618 INFO L387 tUnfolder$Statistics]: existing Event has 175 ancestors and is cut-off event [2022-07-22 21:46:21,618 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-22 21:46:21,621 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([915] thread2EXIT-->L103-2: Formula: (and (= (let ((.cse0 (mod |v_ULTIMATE.start_main_#t~mem31#1_5| 4294967296))) (ite (<= .cse0 2147483647) .cse0 (+ (- 4294967296) .cse0))) v_thread2Thread1of1ForFork0_thidvar0_4) (= v_thread2Thread1of1ForFork0_thidvar2_4 0) (= v_thread2Thread1of1ForFork0_thidvar1_4 0)) InVars {ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} OutVars{ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} AuxVars[] AssignedVars[][241], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 1161#(<= 1 ~N~0), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 2191#(= ~res1~0 0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 200#L103-2true, 245#true, 19#L80true, 279#(<= 1 ~N~0), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-22 21:46:21,621 INFO L384 tUnfolder$Statistics]: this new event has 192 ancestors and is cut-off event [2022-07-22 21:46:21,621 INFO L387 tUnfolder$Statistics]: existing Event has 183 ancestors and is cut-off event [2022-07-22 21:46:21,621 INFO L387 tUnfolder$Statistics]: existing Event has 176 ancestors and is cut-off event [2022-07-22 21:46:21,622 INFO L387 tUnfolder$Statistics]: existing Event has 160 ancestors and is cut-off event [2022-07-22 21:46:21,626 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([915] thread2EXIT-->L103-2: Formula: (and (= (let ((.cse0 (mod |v_ULTIMATE.start_main_#t~mem31#1_5| 4294967296))) (ite (<= .cse0 2147483647) .cse0 (+ (- 4294967296) .cse0))) v_thread2Thread1of1ForFork0_thidvar0_4) (= v_thread2Thread1of1ForFork0_thidvar2_4 0) (= v_thread2Thread1of1ForFork0_thidvar1_4 0)) InVars {ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} OutVars{ULTIMATE.start_main_#t~mem31#1=|v_ULTIMATE.start_main_#t~mem31#1_5|, thread2Thread1of1ForFork0_thidvar2=v_thread2Thread1of1ForFork0_thidvar2_4, thread2Thread1of1ForFork0_thidvar1=v_thread2Thread1of1ForFork0_thidvar1_4, thread2Thread1of1ForFork0_thidvar0=v_thread2Thread1of1ForFork0_thidvar0_4} AuxVars[] AssignedVars[][238], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 1161#(<= 1 ~N~0), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 2148#true, 200#L103-2true, 245#true, 19#L80true, 279#(<= 1 ~N~0), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-22 21:46:21,627 INFO L384 tUnfolder$Statistics]: this new event has 199 ancestors and is cut-off event [2022-07-22 21:46:21,627 INFO L387 tUnfolder$Statistics]: existing Event has 190 ancestors and is cut-off event [2022-07-22 21:46:21,627 INFO L387 tUnfolder$Statistics]: existing Event has 183 ancestors and is cut-off event [2022-07-22 21:46:21,627 INFO L387 tUnfolder$Statistics]: existing Event has 167 ancestors and is cut-off event [2022-07-22 21:46:21,627 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 2191#(= ~res1~0 0), 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 171#L75-4true, 35#L102-2true, 245#true, 279#(<= 1 ~N~0), Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-22 21:46:21,628 INFO L384 tUnfolder$Statistics]: this new event has 193 ancestors and is cut-off event [2022-07-22 21:46:21,628 INFO L387 tUnfolder$Statistics]: existing Event has 177 ancestors and is cut-off event [2022-07-22 21:46:21,628 INFO L387 tUnfolder$Statistics]: existing Event has 184 ancestors and is cut-off event [2022-07-22 21:46:21,628 INFO L387 tUnfolder$Statistics]: existing Event has 177 ancestors and is cut-off event [2022-07-22 21:46:21,629 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([902] L75-3-->L75-4: Formula: (= (+ |v_thread3Thread1of1ForFork1_#t~post13#1_3| 1) |v_thread3Thread1of1ForFork1_~i~2#1_13|) InVars {thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} OutVars{thread3Thread1of1ForFork1_~i~2#1=|v_thread3Thread1of1ForFork1_~i~2#1_13|, thread3Thread1of1ForFork1_#t~post13#1=|v_thread3Thread1of1ForFork1_#t~post13#1_3|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2#1][220], [Black: 2138#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 1148#(and (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_#in~size#1| 0)) (or (<= 1 ~N~0) (<= |ULTIMATE.start_create_fresh_int_array_~size#1| 0)) (or (not (< |ULTIMATE.start_create_fresh_int_array_~i~3#1| |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= 1 ~N~0))), Black: 1150#(and (< |thread1Thread1of1ForFork2_~i~0#1| ~N~0) (<= 1 ~N~0)), Black: 2132#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0)), Black: 2140#(and (< |thread2Thread1of1ForFork0_~i~1#1| ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), 18#L62-4true, 1161#(<= 1 ~N~0), Black: 259#(and (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~3#1| 0) (<= ~N~0 |ULTIMATE.start_create_fresh_int_array_~size#1|)), 2148#true, 171#L75-4true, 35#L102-2true, 245#true, 279#(<= 1 ~N~0), Black: 2134#(and (or (< |thread3Thread1of1ForFork1_~i~2#1| ~N~0) (<= 1 ~M~0)) (<= 1 ~N~0)), Black: 2136#(and (<= 1 ~N~0) (<= 1 ~M~0))]) [2022-07-22 21:46:21,630 INFO L384 tUnfolder$Statistics]: this new event has 200 ancestors and is cut-off event [2022-07-22 21:46:21,630 INFO L387 tUnfolder$Statistics]: existing Event has 184 ancestors and is cut-off event [2022-07-22 21:46:21,630 INFO L387 tUnfolder$Statistics]: existing Event has 184 ancestors and is cut-off event [2022-07-22 21:46:21,630 INFO L387 tUnfolder$Statistics]: existing Event has 191 ancestors and is cut-off event [2022-07-22 21:46:21,630 INFO L129 PetriNetUnfolder]: 188/1232 cut-off events. [2022-07-22 21:46:21,630 INFO L130 PetriNetUnfolder]: For 208/240 co-relation queries the response was YES. [2022-07-22 21:46:21,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 1232 events. 188/1232 cut-off events. For 208/240 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7344 event pairs, 7 based on Foata normal form. 2/1154 useless extension candidates. Maximal degree in co-relation 1800. Up to 77 conditions per place. [2022-07-22 21:46:21,647 INFO L132 encePairwiseOnDemand]: 249/257 looper letters, 47 selfloop transitions, 6 changer transitions 4/257 dead transitions. [2022-07-22 21:46:21,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 257 transitions, 755 flow [2022-07-22 21:46:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:46:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:46:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1246 transitions. [2022-07-22 21:46:21,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.808041504539559 [2022-07-22 21:46:21,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1246 transitions. [2022-07-22 21:46:21,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1246 transitions. [2022-07-22 21:46:21,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:21,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1246 transitions. [2022-07-22 21:46:21,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.66666666666666) internal successors, (1246), 6 states have internal predecessors, (1246), 0 states have call successors, (0), 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 21:46:21,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 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 21:46:21,657 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 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 21:46:21,657 INFO L186 Difference]: Start difference. First operand has 240 places, 235 transitions, 588 flow. Second operand 6 states and 1246 transitions. [2022-07-22 21:46:21,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 257 transitions, 755 flow [2022-07-22 21:46:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 257 transitions, 748 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:46:21,665 INFO L242 Difference]: Finished difference. Result has 244 places, 239 transitions, 617 flow [2022-07-22 21:46:21,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=244, PETRI_TRANSITIONS=239} [2022-07-22 21:46:21,666 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 16 predicate places. [2022-07-22 21:46:21,667 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 239 transitions, 617 flow [2022-07-22 21:46:21,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.33333333333334) internal successors, (1220), 6 states have internal predecessors, (1220), 0 states have call successors, (0), 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 21:46:21,667 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:21,668 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:21,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:21,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:21,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2013812326, now seen corresponding path program 1 times [2022-07-22 21:46:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:21,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820221819] [2022-07-22 21:46:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:21,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:46:22,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:22,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820221819] [2022-07-22 21:46:22,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820221819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:22,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188169509] [2022-07-22 21:46:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:22,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:22,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:22,040 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 21:46:22,042 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 21:46:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:22,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:46:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:46:22,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:46:22,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188169509] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:22,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:46:22,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-22 21:46:22,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064696658] [2022-07-22 21:46:22,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:22,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:46:22,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:46:22,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:46:22,639 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 257 [2022-07-22 21:46:22,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 239 transitions, 617 flow. Second operand has 9 states, 9 states have (on average 189.22222222222223) internal successors, (1703), 9 states have internal predecessors, (1703), 0 states have call successors, (0), 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 21:46:22,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:22,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 257 [2022-07-22 21:46:22,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:24,484 INFO L129 PetriNetUnfolder]: 4159/10926 cut-off events. [2022-07-22 21:46:24,485 INFO L130 PetriNetUnfolder]: For 6685/7637 co-relation queries the response was YES. [2022-07-22 21:46:24,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22589 conditions, 10926 events. 4159/10926 cut-off events. For 6685/7637 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 110574 event pairs, 712 based on Foata normal form. 938/10972 useless extension candidates. Maximal degree in co-relation 22572. Up to 1647 conditions per place. [2022-07-22 21:46:24,597 INFO L132 encePairwiseOnDemand]: 246/257 looper letters, 143 selfloop transitions, 27 changer transitions 0/336 dead transitions. [2022-07-22 21:46:24,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 336 transitions, 1373 flow [2022-07-22 21:46:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:46:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:46:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2156 transitions. [2022-07-22 21:46:24,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7626459143968871 [2022-07-22 21:46:24,602 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2156 transitions. [2022-07-22 21:46:24,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2156 transitions. [2022-07-22 21:46:24,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:24,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2156 transitions. [2022-07-22 21:46:24,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.0) internal successors, (2156), 11 states have internal predecessors, (2156), 0 states have call successors, (0), 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 21:46:24,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 21:46:24,613 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 257.0) internal successors, (3084), 12 states have internal predecessors, (3084), 0 states have call successors, (0), 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 21:46:24,613 INFO L186 Difference]: Start difference. First operand has 244 places, 239 transitions, 617 flow. Second operand 11 states and 2156 transitions. [2022-07-22 21:46:24,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 336 transitions, 1373 flow [2022-07-22 21:46:24,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 336 transitions, 1369 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:46:24,644 INFO L242 Difference]: Finished difference. Result has 254 places, 256 transitions, 810 flow [2022-07-22 21:46:24,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=810, PETRI_PLACES=254, PETRI_TRANSITIONS=256} [2022-07-22 21:46:24,646 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 26 predicate places. [2022-07-22 21:46:24,646 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 256 transitions, 810 flow [2022-07-22 21:46:24,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.22222222222223) internal successors, (1703), 9 states have internal predecessors, (1703), 0 states have call successors, (0), 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 21:46:24,647 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:24,647 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:24,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:24,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:24,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:24,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2072175892, now seen corresponding path program 2 times [2022-07-22 21:46:24,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:24,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153358917] [2022-07-22 21:46:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:24,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:46:25,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:25,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153358917] [2022-07-22 21:46:25,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153358917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:46:25,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232877440] [2022-07-22 21:46:25,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:46:25,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:25,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:46:25,036 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:46:25,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:46:25,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:46:25,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:46:25,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:46:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:46:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:46:25,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:46:25,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232877440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:25,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:46:25,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-22 21:46:25,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728926611] [2022-07-22 21:46:25,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:25,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:46:25,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:46:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:46:25,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 257 [2022-07-22 21:46:25,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 256 transitions, 810 flow. Second operand has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 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 21:46:25,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:25,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 257 [2022-07-22 21:46:25,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:26,442 INFO L129 PetriNetUnfolder]: 1952/6198 cut-off events. [2022-07-22 21:46:26,443 INFO L130 PetriNetUnfolder]: For 6059/6619 co-relation queries the response was YES. [2022-07-22 21:46:26,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13211 conditions, 6198 events. 1952/6198 cut-off events. For 6059/6619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 59031 event pairs, 360 based on Foata normal form. 581/6221 useless extension candidates. Maximal degree in co-relation 13191. Up to 1798 conditions per place. [2022-07-22 21:46:26,528 INFO L132 encePairwiseOnDemand]: 248/257 looper letters, 65 selfloop transitions, 18 changer transitions 0/261 dead transitions. [2022-07-22 21:46:26,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 261 transitions, 983 flow [2022-07-22 21:46:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:46:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:46:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1531 transitions. [2022-07-22 21:46:26,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7446498054474708 [2022-07-22 21:46:26,533 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1531 transitions. [2022-07-22 21:46:26,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1531 transitions. [2022-07-22 21:46:26,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:26,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1531 transitions. [2022-07-22 21:46:26,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 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 21:46:26,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 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 21:46:26,542 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 257.0) internal successors, (2313), 9 states have internal predecessors, (2313), 0 states have call successors, (0), 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 21:46:26,542 INFO L186 Difference]: Start difference. First operand has 254 places, 256 transitions, 810 flow. Second operand 8 states and 1531 transitions. [2022-07-22 21:46:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 261 transitions, 983 flow [2022-07-22 21:46:26,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 261 transitions, 951 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-22 21:46:26,566 INFO L242 Difference]: Finished difference. Result has 252 places, 249 transitions, 768 flow [2022-07-22 21:46:26,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=768, PETRI_PLACES=252, PETRI_TRANSITIONS=249} [2022-07-22 21:46:26,568 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 24 predicate places. [2022-07-22 21:46:26,568 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 249 transitions, 768 flow [2022-07-22 21:46:26,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 190.83333333333334) internal successors, (1145), 6 states have internal predecessors, (1145), 0 states have call successors, (0), 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 21:46:26,569 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:26,569 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:26,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:46:26,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:46:26,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash -969792038, now seen corresponding path program 1 times [2022-07-22 21:46:26,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:26,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232851813] [2022-07-22 21:46:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:26,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:46:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232851813] [2022-07-22 21:46:27,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232851813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:27,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:27,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:46:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421597897] [2022-07-22 21:46:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:27,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:46:27,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:46:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:46:27,006 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 257 [2022-07-22 21:46:27,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 249 transitions, 768 flow. Second operand has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 21:46:27,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:27,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 257 [2022-07-22 21:46:27,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:42,934 INFO L129 PetriNetUnfolder]: 57483/126228 cut-off events. [2022-07-22 21:46:42,934 INFO L130 PetriNetUnfolder]: For 44485/45680 co-relation queries the response was YES. [2022-07-22 21:46:43,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 245745 conditions, 126228 events. 57483/126228 cut-off events. For 44485/45680 co-relation queries the response was YES. Maximal size of possible extension queue 3861. Compared 1584873 event pairs, 27819 based on Foata normal form. 554/116579 useless extension candidates. Maximal degree in co-relation 245728. Up to 28157 conditions per place. [2022-07-22 21:46:44,637 INFO L132 encePairwiseOnDemand]: 237/257 looper letters, 255 selfloop transitions, 36 changer transitions 0/462 dead transitions. [2022-07-22 21:46:44,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 462 transitions, 1935 flow [2022-07-22 21:46:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:46:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:46:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3117 transitions. [2022-07-22 21:46:44,646 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7134355687800412 [2022-07-22 21:46:44,646 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3117 transitions. [2022-07-22 21:46:44,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3117 transitions. [2022-07-22 21:46:44,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:44,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3117 transitions. [2022-07-22 21:46:44,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 183.35294117647058) internal successors, (3117), 17 states have internal predecessors, (3117), 0 states have call successors, (0), 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 21:46:44,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 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 21:46:44,669 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 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 21:46:44,670 INFO L186 Difference]: Start difference. First operand has 252 places, 249 transitions, 768 flow. Second operand 17 states and 3117 transitions. [2022-07-22 21:46:44,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 462 transitions, 1935 flow [2022-07-22 21:46:45,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 462 transitions, 1915 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:46:45,171 INFO L242 Difference]: Finished difference. Result has 273 places, 283 transitions, 985 flow [2022-07-22 21:46:45,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=985, PETRI_PLACES=273, PETRI_TRANSITIONS=283} [2022-07-22 21:46:45,172 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 45 predicate places. [2022-07-22 21:46:45,172 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 283 transitions, 985 flow [2022-07-22 21:46:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 21:46:45,174 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:46:45,174 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:45,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:46:45,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:46:45,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:46:45,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1919021816, now seen corresponding path program 1 times [2022-07-22 21:46:45,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:46:45,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436887072] [2022-07-22 21:46:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:46:45,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:46:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:46:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:46:45,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:46:45,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436887072] [2022-07-22 21:46:45,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436887072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:46:45,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:46:45,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 21:46:45,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030876375] [2022-07-22 21:46:45,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:46:45,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:46:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:46:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:46:45,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 257 [2022-07-22 21:46:45,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 283 transitions, 985 flow. Second operand has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 21:46:45,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:45,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 257 [2022-07-22 21:46:45,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:46:58,521 INFO L129 PetriNetUnfolder]: 51910/95256 cut-off events. [2022-07-22 21:46:58,521 INFO L130 PetriNetUnfolder]: For 78570/79858 co-relation queries the response was YES. [2022-07-22 21:46:59,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232803 conditions, 95256 events. 51910/95256 cut-off events. For 78570/79858 co-relation queries the response was YES. Maximal size of possible extension queue 3274. Compared 1033801 event pairs, 22608 based on Foata normal form. 1046/91950 useless extension candidates. Maximal degree in co-relation 232776. Up to 29133 conditions per place. [2022-07-22 21:46:59,720 INFO L132 encePairwiseOnDemand]: 239/257 looper letters, 288 selfloop transitions, 21 changer transitions 2/478 dead transitions. [2022-07-22 21:46:59,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 478 transitions, 2374 flow [2022-07-22 21:46:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:46:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:46:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2737 transitions. [2022-07-22 21:46:59,727 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7099870298313878 [2022-07-22 21:46:59,727 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2737 transitions. [2022-07-22 21:46:59,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2737 transitions. [2022-07-22 21:46:59,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:46:59,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2737 transitions. [2022-07-22 21:46:59,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 182.46666666666667) internal successors, (2737), 15 states have internal predecessors, (2737), 0 states have call successors, (0), 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 21:46:59,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 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 21:46:59,741 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 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 21:46:59,741 INFO L186 Difference]: Start difference. First operand has 273 places, 283 transitions, 985 flow. Second operand 15 states and 2737 transitions. [2022-07-22 21:46:59,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 478 transitions, 2374 flow [2022-07-22 21:47:00,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 478 transitions, 2367 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:47:00,649 INFO L242 Difference]: Finished difference. Result has 293 places, 297 transitions, 1149 flow [2022-07-22 21:47:00,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1149, PETRI_PLACES=293, PETRI_TRANSITIONS=297} [2022-07-22 21:47:00,650 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 65 predicate places. [2022-07-22 21:47:00,650 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 297 transitions, 1149 flow [2022-07-22 21:47:00,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.16666666666666) internal successors, (2078), 12 states have internal predecessors, (2078), 0 states have call successors, (0), 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 21:47:00,651 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:47:00,651 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:00,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:47:00,651 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:47:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:47:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 886910242, now seen corresponding path program 2 times [2022-07-22 21:47:00,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:47:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519835869] [2022-07-22 21:47:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:47:00,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:47:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:47:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:47:00,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:47:00,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519835869] [2022-07-22 21:47:00,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519835869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:47:00,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:47:00,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 21:47:00,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649734552] [2022-07-22 21:47:00,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:47:00,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:47:00,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:47:00,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:47:00,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:47:00,991 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 257 [2022-07-22 21:47:00,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 297 transitions, 1149 flow. Second operand has 19 states, 19 states have (on average 150.21052631578948) internal successors, (2854), 19 states have internal predecessors, (2854), 0 states have call successors, (0), 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 21:47:00,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:47:00,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 257 [2022-07-22 21:47:00,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand