./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-dec.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-min-max-dec.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 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:48:31,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:48:31,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:48:31,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:48:31,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:48:31,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:48:31,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:48:31,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:48:31,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:48:31,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:48:31,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:48:31,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:48:31,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:48:31,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:48:31,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:48:31,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:48:31,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:48:31,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:48:31,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:48:31,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:48:31,411 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:48:31,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:48:31,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:48:31,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:48:31,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:48:31,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:48:31,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:48:31,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:48:31,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:48:31,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:48:31,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:48:31,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:48:31,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:48:31,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:48:31,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:48:31,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:48:31,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:48:31,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:48:31,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:48:31,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:48:31,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:48:31,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:48:31,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:48:31,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:48:31,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:48:31,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:48:31,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:48:31,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:48:31,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:48:31,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:48:31,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:48:31,452 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:48:31,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:48:31,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:48:31,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:48:31,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:48:31,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:48:31,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:48:31,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:48:31,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:48:31,454 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:48:31,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:48:31,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:48:31,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:48:31,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:48:31,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:48:31,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:48:31,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:31,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:48:31,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:48:31,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:48:31,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:48:31,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:48:31,456 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:48:31,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:48:31,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:48:31,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-07-22 21:48:31,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:48:31,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:48:31,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:48:31,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:48:31,637 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:48:31,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-07-22 21:48:31,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ea6cc9b/76c4d0047eec4ce4b38460a788bbc42b/FLAG9aa654c36 [2022-07-22 21:48:32,040 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:48:32,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-07-22 21:48:32,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ea6cc9b/76c4d0047eec4ce4b38460a788bbc42b/FLAG9aa654c36 [2022-07-22 21:48:32,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ea6cc9b/76c4d0047eec4ce4b38460a788bbc42b [2022-07-22 21:48:32,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:48:32,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:48:32,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:32,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:48:32,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:48:32,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343a5ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32, skipping insertion in model container [2022-07-22 21:48:32,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:48:32,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:48:32,266 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-min-max-dec.wvr.c[3019,3032] [2022-07-22 21:48:32,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:32,275 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:48:32,290 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-min-max-dec.wvr.c[3019,3032] [2022-07-22 21:48:32,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:32,301 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:48:32,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32 WrapperNode [2022-07-22 21:48:32,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:32,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:32,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:48:32,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:48:32,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,340 INFO L137 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 137 [2022-07-22 21:48:32,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:32,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:48:32,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:48:32,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:48:32,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:48:32,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:48:32,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:48:32,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:48:32,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (1/1) ... [2022-07-22 21:48:32,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:32,401 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 21:48:32,407 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 21:48:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:48:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:48:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:48:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:48:32,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:48:32,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:48:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:48:32,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:48:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:48:32,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:48:32,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-22 21:48:32,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-22 21:48:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:48:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:48:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:48:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:48:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:48:32,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:48:32,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:48:32,432 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 21:48:32,527 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:48:32,528 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:48:32,711 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:48:32,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:48:32,778 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:48:32,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:32 BoogieIcfgContainer [2022-07-22 21:48:32,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:48:32,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:48:32,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:48:32,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:48:32,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:48:32" (1/3) ... [2022-07-22 21:48:32,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a13fa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:32, skipping insertion in model container [2022-07-22 21:48:32,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:32" (2/3) ... [2022-07-22 21:48:32,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a13fa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:32, skipping insertion in model container [2022-07-22 21:48:32,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:32" (3/3) ... [2022-07-22 21:48:32,786 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-07-22 21:48:32,789 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:48:32,795 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:48:32,795 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:48:32,795 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:48:32,849 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 21:48:32,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 172 transitions, 376 flow [2022-07-22 21:48:32,957 INFO L129 PetriNetUnfolder]: 12/168 cut-off events. [2022-07-22 21:48:32,957 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:48:32,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 168 events. 12/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-07-22 21:48:32,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 172 transitions, 376 flow [2022-07-22 21:48:32,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 155 transitions, 334 flow [2022-07-22 21:48:32,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:48:32,984 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@63e86dff, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38337c67 [2022-07-22 21:48:32,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:48:33,052 INFO L129 PetriNetUnfolder]: 12/154 cut-off events. [2022-07-22 21:48:33,052 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:48:33,052 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:33,053 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] [2022-07-22 21:48:33,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash -373799260, now seen corresponding path program 1 times [2022-07-22 21:48:33,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:33,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846152491] [2022-07-22 21:48:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:33,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:33,271 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 21:48:33,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846152491] [2022-07-22 21:48:33,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846152491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:33,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:33,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:48:33,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92369040] [2022-07-22 21:48:33,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:33,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:48:33,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:48:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:48:33,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-07-22 21:48:33,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 155 transitions, 334 flow. Second operand has 2 states, 2 states have (on average 157.0) internal successors, (314), 2 states have internal predecessors, (314), 0 states have call successors, (0), 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 21:48:33,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:33,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-07-22 21:48:33,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:33,407 INFO L129 PetriNetUnfolder]: 105/512 cut-off events. [2022-07-22 21:48:33,408 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-07-22 21:48:33,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 512 events. 105/512 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2344 event pairs, 71 based on Foata normal form. 67/517 useless extension candidates. Maximal degree in co-relation 583. Up to 144 conditions per place. [2022-07-22 21:48:33,415 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 13 selfloop transitions, 0 changer transitions 4/147 dead transitions. [2022-07-22 21:48:33,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 147 transitions, 344 flow [2022-07-22 21:48:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:48:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:48:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 321 transitions. [2022-07-22 21:48:33,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9331395348837209 [2022-07-22 21:48:33,448 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 321 transitions. [2022-07-22 21:48:33,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 321 transitions. [2022-07-22 21:48:33,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:33,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 321 transitions. [2022-07-22 21:48:33,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 160.5) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 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 21:48:33,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 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 21:48:33,457 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 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 21:48:33,458 INFO L186 Difference]: Start difference. First operand has 156 places, 155 transitions, 334 flow. Second operand 2 states and 321 transitions. [2022-07-22 21:48:33,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 147 transitions, 344 flow [2022-07-22 21:48:33,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 147 transitions, 328 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:48:33,465 INFO L242 Difference]: Finished difference. Result has 149 places, 143 transitions, 294 flow [2022-07-22 21:48:33,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=294, PETRI_PLACES=149, PETRI_TRANSITIONS=143} [2022-07-22 21:48:33,470 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, -7 predicate places. [2022-07-22 21:48:33,471 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 143 transitions, 294 flow [2022-07-22 21:48:33,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 157.0) internal successors, (314), 2 states have internal predecessors, (314), 0 states have call successors, (0), 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 21:48:33,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:33,471 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] [2022-07-22 21:48:33,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:48:33,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1498849792, now seen corresponding path program 1 times [2022-07-22 21:48:33,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:33,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114321656] [2022-07-22 21:48:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:33,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:33,696 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 21:48:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114321656] [2022-07-22 21:48:33,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114321656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:33,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:33,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:48:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082664849] [2022-07-22 21:48:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:33,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:48:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:48:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:48:33,700 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 172 [2022-07-22 21:48:33,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 143 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 123.5) internal successors, (741), 6 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:33,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:33,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 172 [2022-07-22 21:48:33,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:33,989 INFO L129 PetriNetUnfolder]: 1341/2483 cut-off events. [2022-07-22 21:48:33,990 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-22 21:48:33,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4637 conditions, 2483 events. 1341/2483 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16155 event pairs, 633 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 4634. Up to 1227 conditions per place. [2022-07-22 21:48:34,009 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 50 selfloop transitions, 5 changer transitions 0/157 dead transitions. [2022-07-22 21:48:34,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 435 flow [2022-07-22 21:48:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:48:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:48:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 764 transitions. [2022-07-22 21:48:34,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7403100775193798 [2022-07-22 21:48:34,015 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 764 transitions. [2022-07-22 21:48:34,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 764 transitions. [2022-07-22 21:48:34,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:34,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 764 transitions. [2022-07-22 21:48:34,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.33333333333333) internal successors, (764), 6 states have internal predecessors, (764), 0 states have call successors, (0), 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 21:48:34,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 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 21:48:34,021 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 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 21:48:34,021 INFO L186 Difference]: Start difference. First operand has 149 places, 143 transitions, 294 flow. Second operand 6 states and 764 transitions. [2022-07-22 21:48:34,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 435 flow [2022-07-22 21:48:34,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 157 transitions, 435 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:48:34,027 INFO L242 Difference]: Finished difference. Result has 151 places, 144 transitions, 312 flow [2022-07-22 21:48:34,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=151, PETRI_TRANSITIONS=144} [2022-07-22 21:48:34,029 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, -5 predicate places. [2022-07-22 21:48:34,029 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 144 transitions, 312 flow [2022-07-22 21:48:34,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.5) internal successors, (741), 6 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:34,029 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:34,030 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] [2022-07-22 21:48:34,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:48:34,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1998664439, now seen corresponding path program 1 times [2022-07-22 21:48:34,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259731057] [2022-07-22 21:48:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:34,168 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 21:48:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259731057] [2022-07-22 21:48:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259731057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:34,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:34,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:48:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828368343] [2022-07-22 21:48:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:34,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:48:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:48:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:48:34,171 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-22 21:48:34,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 144 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 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 21:48:34,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:34,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-22 21:48:34,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:34,549 INFO L129 PetriNetUnfolder]: 1707/3469 cut-off events. [2022-07-22 21:48:34,550 INFO L130 PetriNetUnfolder]: For 414/414 co-relation queries the response was YES. [2022-07-22 21:48:34,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6473 conditions, 3469 events. 1707/3469 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 24764 event pairs, 1140 based on Foata normal form. 46/2928 useless extension candidates. Maximal degree in co-relation 6468. Up to 1917 conditions per place. [2022-07-22 21:48:34,568 INFO L132 encePairwiseOnDemand]: 163/172 looper letters, 36 selfloop transitions, 6 changer transitions 24/172 dead transitions. [2022-07-22 21:48:34,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 510 flow [2022-07-22 21:48:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:48:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:48:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1074 transitions. [2022-07-22 21:48:34,572 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7805232558139535 [2022-07-22 21:48:34,572 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1074 transitions. [2022-07-22 21:48:34,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1074 transitions. [2022-07-22 21:48:34,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:34,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1074 transitions. [2022-07-22 21:48:34,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.25) internal successors, (1074), 8 states have internal predecessors, (1074), 0 states have call successors, (0), 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 21:48:34,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 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 21:48:34,577 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 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 21:48:34,577 INFO L186 Difference]: Start difference. First operand has 151 places, 144 transitions, 312 flow. Second operand 8 states and 1074 transitions. [2022-07-22 21:48:34,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 510 flow [2022-07-22 21:48:34,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 172 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:48:34,583 INFO L242 Difference]: Finished difference. Result has 157 places, 145 transitions, 328 flow [2022-07-22 21:48:34,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=328, PETRI_PLACES=157, PETRI_TRANSITIONS=145} [2022-07-22 21:48:34,585 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 1 predicate places. [2022-07-22 21:48:34,585 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 328 flow [2022-07-22 21:48:34,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 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 21:48:34,586 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:34,586 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] [2022-07-22 21:48:34,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:48:34,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash 989353094, now seen corresponding path program 1 times [2022-07-22 21:48:34,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:34,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550561998] [2022-07-22 21:48:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550561998] [2022-07-22 21:48:34,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550561998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817694011] [2022-07-22 21:48:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:34,704 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 21:48:34,712 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 21:48:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:34,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:48:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:34,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:35,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817694011] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:35,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:48:35,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:48:35,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445519826] [2022-07-22 21:48:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:35,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:48:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:48:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:48:35,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-22 21:48:35,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 145 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 130.42857142857142) internal successors, (913), 7 states have internal predecessors, (913), 0 states have call successors, (0), 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 21:48:35,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:35,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-22 21:48:35,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:35,425 INFO L129 PetriNetUnfolder]: 1362/2463 cut-off events. [2022-07-22 21:48:35,425 INFO L130 PetriNetUnfolder]: For 270/331 co-relation queries the response was YES. [2022-07-22 21:48:35,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4933 conditions, 2463 events. 1362/2463 cut-off events. For 270/331 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15536 event pairs, 495 based on Foata normal form. 61/2137 useless extension candidates. Maximal degree in co-relation 4925. Up to 1007 conditions per place. [2022-07-22 21:48:35,441 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 43 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2022-07-22 21:48:35,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 459 flow [2022-07-22 21:48:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:48:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:48:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 932 transitions. [2022-07-22 21:48:35,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7740863787375415 [2022-07-22 21:48:35,445 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 932 transitions. [2022-07-22 21:48:35,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 932 transitions. [2022-07-22 21:48:35,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:35,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 932 transitions. [2022-07-22 21:48:35,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.14285714285714) internal successors, (932), 7 states have internal predecessors, (932), 0 states have call successors, (0), 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 21:48:35,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 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 21:48:35,450 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 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 21:48:35,450 INFO L186 Difference]: Start difference. First operand has 157 places, 145 transitions, 328 flow. Second operand 7 states and 932 transitions. [2022-07-22 21:48:35,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 459 flow [2022-07-22 21:48:35,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 157 transitions, 443 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-22 21:48:35,453 INFO L242 Difference]: Finished difference. Result has 158 places, 147 transitions, 347 flow [2022-07-22 21:48:35,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=158, PETRI_TRANSITIONS=147} [2022-07-22 21:48:35,454 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 2 predicate places. [2022-07-22 21:48:35,454 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 347 flow [2022-07-22 21:48:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.42857142857142) internal successors, (913), 7 states have internal predecessors, (913), 0 states have call successors, (0), 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 21:48:35,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:35,455 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] [2022-07-22 21:48:35,474 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 21:48:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:35,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash 169688933, now seen corresponding path program 1 times [2022-07-22 21:48:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:35,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66669873] [2022-07-22 21:48:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:35,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:35,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66669873] [2022-07-22 21:48:35,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66669873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194148910] [2022-07-22 21:48:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:35,769 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 21:48:35,771 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 21:48:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:48:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:35,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:36,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194148910] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:36,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:48:36,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:48:36,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825254393] [2022-07-22 21:48:36,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:36,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:48:36,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:48:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:48:36,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 172 [2022-07-22 21:48:36,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 147 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 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 21:48:36,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:36,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 172 [2022-07-22 21:48:36,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:36,343 INFO L129 PetriNetUnfolder]: 1309/2408 cut-off events. [2022-07-22 21:48:36,343 INFO L130 PetriNetUnfolder]: For 696/973 co-relation queries the response was YES. [2022-07-22 21:48:36,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5238 conditions, 2408 events. 1309/2408 cut-off events. For 696/973 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15263 event pairs, 472 based on Foata normal form. 277/2523 useless extension candidates. Maximal degree in co-relation 5229. Up to 1084 conditions per place. [2022-07-22 21:48:36,359 INFO L132 encePairwiseOnDemand]: 164/172 looper letters, 46 selfloop transitions, 7 changer transitions 0/160 dead transitions. [2022-07-22 21:48:36,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 160 transitions, 492 flow [2022-07-22 21:48:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:48:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:48:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 933 transitions. [2022-07-22 21:48:36,362 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7749169435215947 [2022-07-22 21:48:36,362 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 933 transitions. [2022-07-22 21:48:36,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 933 transitions. [2022-07-22 21:48:36,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:36,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 933 transitions. [2022-07-22 21:48:36,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 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 21:48:36,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 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 21:48:36,366 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 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 21:48:36,366 INFO L186 Difference]: Start difference. First operand has 158 places, 147 transitions, 347 flow. Second operand 7 states and 933 transitions. [2022-07-22 21:48:36,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 160 transitions, 492 flow [2022-07-22 21:48:36,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 483 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:48:36,371 INFO L242 Difference]: Finished difference. Result has 162 places, 148 transitions, 366 flow [2022-07-22 21:48:36,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=162, PETRI_TRANSITIONS=148} [2022-07-22 21:48:36,373 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 6 predicate places. [2022-07-22 21:48:36,373 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 148 transitions, 366 flow [2022-07-22 21:48:36,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 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 21:48:36,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:36,374 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] [2022-07-22 21:48:36,391 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 21:48:36,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:36,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1362204798, now seen corresponding path program 1 times [2022-07-22 21:48:36,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:36,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741218618] [2022-07-22 21:48:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:36,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741218618] [2022-07-22 21:48:36,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741218618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282263508] [2022-07-22 21:48:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:36,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:36,781 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 21:48:36,782 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 21:48:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 21:48:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:37,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:48:37,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:48:37,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:48:37,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:48:37,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:48:37,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 21:48:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:37,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:37,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282263508] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:37,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:48:37,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 24] total 35 [2022-07-22 21:48:37,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336647865] [2022-07-22 21:48:37,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:37,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:48:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:48:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 21:48:37,980 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 172 [2022-07-22 21:48:37,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 148 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 108.6) internal successors, (1086), 10 states have internal predecessors, (1086), 0 states have call successors, (0), 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 21:48:37,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:37,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 172 [2022-07-22 21:48:37,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:40,625 INFO L129 PetriNetUnfolder]: 15409/28275 cut-off events. [2022-07-22 21:48:40,625 INFO L130 PetriNetUnfolder]: For 8851/8853 co-relation queries the response was YES. [2022-07-22 21:48:40,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59117 conditions, 28275 events. 15409/28275 cut-off events. For 8851/8853 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 252673 event pairs, 2187 based on Foata normal form. 2/27630 useless extension candidates. Maximal degree in co-relation 59106. Up to 6462 conditions per place. [2022-07-22 21:48:40,848 INFO L132 encePairwiseOnDemand]: 158/172 looper letters, 228 selfloop transitions, 30 changer transitions 12/360 dead transitions. [2022-07-22 21:48:40,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 360 transitions, 1519 flow [2022-07-22 21:48:40,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:48:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:48:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1801 transitions. [2022-07-22 21:48:40,852 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6980620155038759 [2022-07-22 21:48:40,852 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1801 transitions. [2022-07-22 21:48:40,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1801 transitions. [2022-07-22 21:48:40,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:40,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1801 transitions. [2022-07-22 21:48:40,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 120.06666666666666) internal successors, (1801), 15 states have internal predecessors, (1801), 0 states have call successors, (0), 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 21:48:40,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 172.0) internal successors, (2752), 16 states have internal predecessors, (2752), 0 states have call successors, (0), 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 21:48:40,859 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 172.0) internal successors, (2752), 16 states have internal predecessors, (2752), 0 states have call successors, (0), 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 21:48:40,859 INFO L186 Difference]: Start difference. First operand has 162 places, 148 transitions, 366 flow. Second operand 15 states and 1801 transitions. [2022-07-22 21:48:40,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 360 transitions, 1519 flow [2022-07-22 21:48:40,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 360 transitions, 1509 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:48:40,951 INFO L242 Difference]: Finished difference. Result has 185 places, 180 transitions, 599 flow [2022-07-22 21:48:40,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=599, PETRI_PLACES=185, PETRI_TRANSITIONS=180} [2022-07-22 21:48:40,954 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 29 predicate places. [2022-07-22 21:48:40,954 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 180 transitions, 599 flow [2022-07-22 21:48:40,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.6) internal successors, (1086), 10 states have internal predecessors, (1086), 0 states have call successors, (0), 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 21:48:40,955 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:40,955 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] [2022-07-22 21:48:40,973 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 21:48:41,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:41,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash 737184260, now seen corresponding path program 2 times [2022-07-22 21:48:41,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:41,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737091371] [2022-07-22 21:48:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737091371] [2022-07-22 21:48:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737091371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063582919] [2022-07-22 21:48:41,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:48:41,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:41,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:41,641 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 21:48:41,642 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 21:48:41,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:48:41,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 21:48:41,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:42,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:48:42,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:48:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:48:42,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:48:42,263 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:42,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 41 [2022-07-22 21:48:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:42,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:42,647 WARN L833 $PredicateComparison]: unable to prove that (forall ((thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (<= c_~min~0 (+ .cse0 1)) (< .cse0 (select .cse1 c_~A~0.offset)) (<= 2147483647 .cse0))))) is different from false [2022-07-22 21:48:42,708 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_229 (Array Int Int)) (thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (< .cse0 (select .cse1 c_~A~0.offset)) (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1)))))) is different from false [2022-07-22 21:48:42,807 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_229 (Array Int Int)) (thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (< .cse0 (select .cse1 c_~A~0.offset)) (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1)))))) (forall ((thread1Thread1of1ForFork0_~i~0 Int)) (not (< c_~min~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* thread1Thread1of1ForFork0_~i~0 4))))))) (forall ((v_ArrVal_229 (Array Int Int)) (thread2Thread1of1ForFork2_~i~1 Int) (v_ArrVal_230 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base))) (let ((.cse2 (select .cse3 (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))))) (or (< .cse2 (select .cse3 c_~A~0.offset)) (<= 2147483647 .cse2) (forall ((thread1Thread1of1ForFork0_~i~0 Int)) (let ((.cse4 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* thread1Thread1of1ForFork0_~i~0 4))))) (or (< c_~min~0 .cse4) (<= .cse4 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_229) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_230) c_~A~0.base) (+ c_~A~0.offset (* thread2Thread1of1ForFork2_~i~1 4))) 1)))))))))) is different from false [2022-07-22 21:48:42,943 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:42,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 789 treesize of output 765 [2022-07-22 21:48:42,964 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:42,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 616 treesize of output 589 [2022-07-22 21:48:42,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:42,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 576 treesize of output 569 [2022-07-22 21:48:43,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:43,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 556 treesize of output 489 [2022-07-22 21:48:43,030 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:48:43,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 476 treesize of output 449 [2022-07-22 21:48:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-07-22 21:48:43,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063582919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:48:43,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:48:43,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 18] total 46 [2022-07-22 21:48:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207249631] [2022-07-22 21:48:43,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:48:43,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 21:48:43,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 21:48:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1644, Unknown=3, NotChecked=252, Total=2070 [2022-07-22 21:48:43,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2022-07-22 21:48:43,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 180 transitions, 599 flow. Second operand has 46 states, 46 states have (on average 88.6304347826087) internal successors, (4077), 46 states have internal predecessors, (4077), 0 states have call successors, (0), 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 21:48:43,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:43,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2022-07-22 21:48:43,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:55,676 INFO L129 PetriNetUnfolder]: 50090/86236 cut-off events. [2022-07-22 21:48:55,676 INFO L130 PetriNetUnfolder]: For 113383/116006 co-relation queries the response was YES. [2022-07-22 21:48:56,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244180 conditions, 86236 events. 50090/86236 cut-off events. For 113383/116006 co-relation queries the response was YES. Maximal size of possible extension queue 3478. Compared 833436 event pairs, 7631 based on Foata normal form. 272/85173 useless extension candidates. Maximal degree in co-relation 244156. Up to 18313 conditions per place. [2022-07-22 21:48:56,558 INFO L132 encePairwiseOnDemand]: 149/172 looper letters, 375 selfloop transitions, 110 changer transitions 335/896 dead transitions. [2022-07-22 21:48:56,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 896 transitions, 5509 flow [2022-07-22 21:48:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 21:48:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-22 21:48:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3784 transitions. [2022-07-22 21:48:56,565 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2022-07-22 21:48:56,566 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3784 transitions. [2022-07-22 21:48:56,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3784 transitions. [2022-07-22 21:48:56,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:56,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3784 transitions. [2022-07-22 21:48:56,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 99.57894736842105) internal successors, (3784), 38 states have internal predecessors, (3784), 0 states have call successors, (0), 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 21:48:56,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 172.0) internal successors, (6708), 39 states have internal predecessors, (6708), 0 states have call successors, (0), 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 21:48:56,583 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 172.0) internal successors, (6708), 39 states have internal predecessors, (6708), 0 states have call successors, (0), 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 21:48:56,583 INFO L186 Difference]: Start difference. First operand has 185 places, 180 transitions, 599 flow. Second operand 38 states and 3784 transitions. [2022-07-22 21:48:56,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 896 transitions, 5509 flow [2022-07-22 21:48:57,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 896 transitions, 5441 flow, removed 34 selfloop flow, removed 4 redundant places. [2022-07-22 21:48:57,436 INFO L242 Difference]: Finished difference. Result has 238 places, 289 transitions, 1794 flow [2022-07-22 21:48:57,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1794, PETRI_PLACES=238, PETRI_TRANSITIONS=289} [2022-07-22 21:48:57,436 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 82 predicate places. [2022-07-22 21:48:57,437 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 289 transitions, 1794 flow [2022-07-22 21:48:57,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 88.6304347826087) internal successors, (4077), 46 states have internal predecessors, (4077), 0 states have call successors, (0), 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 21:48:57,438 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:57,438 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] [2022-07-22 21:48:57,455 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 21:48:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:57,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-22 21:48:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1594503590, now seen corresponding path program 3 times [2022-07-22 21:48:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070312284] [2022-07-22 21:48:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:58,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:58,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070312284] [2022-07-22 21:48:58,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070312284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:58,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227991414] [2022-07-22 21:48:58,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:48:58,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:58,033 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 21:48:58,034 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 21:48:58,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:48:58,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:48:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 21:48:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:48:58,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:48:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:48:58,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:48:58,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:48:58,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:48:58,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 21:48:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:58,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:59,156 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_277 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= c_~min~0 (+ .cse0 1)) (<= 2147483647 .cse0)))) is different from false [2022-07-22 21:48:59,185 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= c_~min~0 (+ .cse0 1)) (<= 2147483647 .cse0)))) is different from false [2022-07-22 21:48:59,376 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_275 (Array Int Int))) (or (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275))) (let ((.cse0 (select (select (store (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse0) (<= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4))) (+ .cse0 1)))))) (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))))) (forall ((v_ArrVal_275 (Array Int Int))) (or (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse2 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse2) (<= c_~min~0 (+ .cse2 1))))) (not (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))))))) is different from false [2022-07-22 21:48:59,477 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_275 (Array Int Int))) (or (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse0 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse0 1))))) (not (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_275 (Array Int Int))) (or (< c_~min~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275) c_~A~0.base) c_~A~0.offset)) (forall ((v_ArrVal_276 (Array Int Int)) (v_ArrVal_277 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_275))) (let ((.cse1 (select (select (store (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_276) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_277) c_~A~0.base) c_~A~0.offset))) (or (<= 2147483647 .cse1) (<= (select (select .cse2 c_~A~0.base) c_~A~0.offset) (+ .cse1 1))))))))) is different from false [2022-07-22 21:48:59,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3649 treesize of output 3341 [2022-07-22 21:48:59,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2766 treesize of output 2664 [2022-07-22 21:48:59,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2664 treesize of output 2576 [2022-07-22 21:48:59,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2576 treesize of output 2560 [2022-07-22 21:48:59,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2560 treesize of output 2384 [2022-07-22 21:48:59,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2384 treesize of output 2378 [2022-07-22 21:48:59,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2378 treesize of output 2370 [2022-07-22 21:49:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-07-22 21:49:08,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227991414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:08,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:08,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 21] total 52 [2022-07-22 21:49:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106426948] [2022-07-22 21:49:08,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:08,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 21:49:08,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 21:49:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2062, Unknown=8, NotChecked=380, Total=2652 [2022-07-22 21:49:08,215 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2022-07-22 21:49:08,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 289 transitions, 1794 flow. Second operand has 52 states, 52 states have (on average 82.59615384615384) internal successors, (4295), 52 states have internal predecessors, (4295), 0 states have call successors, (0), 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 21:49:08,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:08,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2022-07-22 21:49:08,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand