./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-inc-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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:12:22,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:12:22,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:12:22,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:12:22,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:12:22,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:12:22,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:12:22,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:12:22,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:12:22,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:12:22,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:12:22,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:12:22,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:12:22,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:12:22,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:12:22,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:12:22,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:12:22,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:12:22,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:12:22,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:12:22,290 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:12:22,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:12:22,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:12:22,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:12:22,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:12:22,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:12:22,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:12:22,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:12:22,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:12:22,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:12:22,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:12:22,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:12:22,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:12:22,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:12:22,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:12:22,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:12:22,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:12:22,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:12:22,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:12:22,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:12:22,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:12:22,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:12:22,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:12:22,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:12:22,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:12:22,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:12:22,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:12:22,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:12:22,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:12:22,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:12:22,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:12:22,341 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:12:22,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:12:22,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:12:22,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:12:22,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:12:22,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:12:22,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:12:22,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:12:22,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:12:22,344 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:12:22,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:12:22,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:12:22,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:12:22,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:12:22,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:12:22,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:12:22,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:12:22,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:12:22,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:12:22,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:12:22,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:12:22,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:12:22,347 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:12:22,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:12:22,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:12:22,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f [2022-07-13 22:12:22,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:12:22,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:12:22,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:12:22,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:12:22,590 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:12:22,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-07-13 22:12:22,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8ead05f/49bcf6f6cc4645d5958453ff039fc414/FLAGc2c15e99a [2022-07-13 22:12:23,060 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:12:23,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-07-13 22:12:23,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8ead05f/49bcf6f6cc4645d5958453ff039fc414/FLAGc2c15e99a [2022-07-13 22:12:23,459 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e8ead05f/49bcf6f6cc4645d5958453ff039fc414 [2022-07-13 22:12:23,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:12:23,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:12:23,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:12:23,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:12:23,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:12:23,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ba1fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23, skipping insertion in model container [2022-07-13 22:12:23,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:12:23,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:12:23,645 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-inc-dec.wvr.c[3271,3284] [2022-07-13 22:12:23,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:12:23,660 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:12:23,681 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-inc-dec.wvr.c[3271,3284] [2022-07-13 22:12:23,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:12:23,696 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:12:23,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23 WrapperNode [2022-07-13 22:12:23,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:12:23,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:12:23,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:12:23,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:12:23,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,754 INFO L137 Inliner]: procedures = 27, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2022-07-13 22:12:23,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:12:23,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:12:23,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:12:23,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:12:23,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:12:23,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:12:23,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:12:23,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:12:23,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (1/1) ... [2022-07-13 22:12:23,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:12:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:23,835 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) [2022-07-13 22:12:23,867 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 [2022-07-13 22:12:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:12:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:12:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:12:23,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:12:23,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:12:23,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:12:23,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:12:23,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:12:23,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:12:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:12:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 22:12:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 22:12:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:12:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-07-13 22:12:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-07-13 22:12:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:12:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:12:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:12:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:12:23,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:12:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:12:23,888 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:12:23,964 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:12:23,966 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:12:24,282 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:12:24,340 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:12:24,340 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-13 22:12:24,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:12:24 BoogieIcfgContainer [2022-07-13 22:12:24,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:12:24,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:12:24,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:12:24,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:12:24,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:12:23" (1/3) ... [2022-07-13 22:12:24,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283eee47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:12:24, skipping insertion in model container [2022-07-13 22:12:24,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:12:23" (2/3) ... [2022-07-13 22:12:24,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283eee47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:12:24, skipping insertion in model container [2022-07-13 22:12:24,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:12:24" (3/3) ... [2022-07-13 22:12:24,351 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2022-07-13 22:12:24,356 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:12:24,363 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:12:24,363 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:12:24,364 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:12:24,418 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 22:12:24,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 197 places, 195 transitions, 430 flow [2022-07-13 22:12:24,539 INFO L129 PetriNetUnfolder]: 14/190 cut-off events. [2022-07-13 22:12:24,539 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 22:12:24,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 190 events. 14/190 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 133 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2022-07-13 22:12:24,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 195 transitions, 430 flow [2022-07-13 22:12:24,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 175 transitions, 380 flow [2022-07-13 22:12:24,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:12:24,581 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@71ff19c8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a9ebae0 [2022-07-13 22:12:24,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 22:12:24,612 INFO L129 PetriNetUnfolder]: 14/174 cut-off events. [2022-07-13 22:12:24,613 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-13 22:12:24,613 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:24,614 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] [2022-07-13 22:12:24,614 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 3 more)] === [2022-07-13 22:12:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1561513117, now seen corresponding path program 1 times [2022-07-13 22:12:24,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:24,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359406491] [2022-07-13 22:12:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:24,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:24,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359406491] [2022-07-13 22:12:24,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359406491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:12:24,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:12:24,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:12:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722369042] [2022-07-13 22:12:24,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:24,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:12:24,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:24,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:12:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:12:24,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 195 [2022-07-13 22:12:25,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 380 flow. Second operand has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:25,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:25,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 195 [2022-07-13 22:12:25,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:25,296 INFO L129 PetriNetUnfolder]: 308/1173 cut-off events. [2022-07-13 22:12:25,296 INFO L130 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2022-07-13 22:12:25,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1738 conditions, 1173 events. 308/1173 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7396 event pairs, 205 based on Foata normal form. 235/1255 useless extension candidates. Maximal degree in co-relation 1528. Up to 402 conditions per place. [2022-07-13 22:12:25,315 INFO L132 encePairwiseOnDemand]: 186/195 looper letters, 16 selfloop transitions, 0 changer transitions 4/166 dead transitions. [2022-07-13 22:12:25,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 166 transitions, 394 flow [2022-07-13 22:12:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:12:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:12:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 363 transitions. [2022-07-13 22:12:25,331 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9307692307692308 [2022-07-13 22:12:25,331 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 363 transitions. [2022-07-13 22:12:25,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 363 transitions. [2022-07-13 22:12:25,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:25,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 363 transitions. [2022-07-13 22:12:25,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:25,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:25,348 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:25,350 INFO L186 Difference]: Start difference. First operand has 177 places, 175 transitions, 380 flow. Second operand 2 states and 363 transitions. [2022-07-13 22:12:25,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 166 transitions, 394 flow [2022-07-13 22:12:25,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 374 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-13 22:12:25,364 INFO L242 Difference]: Finished difference. Result has 168 places, 162 transitions, 334 flow [2022-07-13 22:12:25,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=334, PETRI_PLACES=168, PETRI_TRANSITIONS=162} [2022-07-13 22:12:25,370 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, -9 predicate places. [2022-07-13 22:12:25,371 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 162 transitions, 334 flow [2022-07-13 22:12:25,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:25,371 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:25,372 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] [2022-07-13 22:12:25,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:12:25,372 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 3 more)] === [2022-07-13 22:12:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:25,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1896277998, now seen corresponding path program 1 times [2022-07-13 22:12:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:25,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533637224] [2022-07-13 22:12:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:25,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533637224] [2022-07-13 22:12:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533637224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:12:25,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:12:25,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:12:25,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007438582] [2022-07-13 22:12:25,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:25,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:12:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:12:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:12:25,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 195 [2022-07-13 22:12:25,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 162 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:25,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:25,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 195 [2022-07-13 22:12:25,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:27,557 INFO L129 PetriNetUnfolder]: 7778/13886 cut-off events. [2022-07-13 22:12:27,557 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2022-07-13 22:12:27,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25159 conditions, 13886 events. 7778/13886 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 118912 event pairs, 3679 based on Foata normal form. 0/11404 useless extension candidates. Maximal degree in co-relation 25156. Up to 6270 conditions per place. [2022-07-13 22:12:27,701 INFO L132 encePairwiseOnDemand]: 189/195 looper letters, 60 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2022-07-13 22:12:27,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 181 transitions, 506 flow [2022-07-13 22:12:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:12:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:12:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2022-07-13 22:12:27,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7487179487179487 [2022-07-13 22:12:27,706 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2022-07-13 22:12:27,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2022-07-13 22:12:27,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:27,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2022-07-13 22:12:27,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,715 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,715 INFO L186 Difference]: Start difference. First operand has 168 places, 162 transitions, 334 flow. Second operand 6 states and 876 transitions. [2022-07-13 22:12:27,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 181 transitions, 506 flow [2022-07-13 22:12:27,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 181 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:12:27,723 INFO L242 Difference]: Finished difference. Result has 170 places, 163 transitions, 352 flow [2022-07-13 22:12:27,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=170, PETRI_TRANSITIONS=163} [2022-07-13 22:12:27,725 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, -7 predicate places. [2022-07-13 22:12:27,725 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 163 transitions, 352 flow [2022-07-13 22:12:27,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:27,726 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:27,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:12:27,726 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 3 more)] === [2022-07-13 22:12:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -178980570, now seen corresponding path program 1 times [2022-07-13 22:12:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:27,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983853571] [2022-07-13 22:12:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:27,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983853571] [2022-07-13 22:12:27,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983853571] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:12:27,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:12:27,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:12:27,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117278744] [2022-07-13 22:12:27,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:27,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:12:27,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:12:27,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:12:27,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-13 22:12:27,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 163 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:27,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-13 22:12:27,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:29,511 INFO L129 PetriNetUnfolder]: 9402/14367 cut-off events. [2022-07-13 22:12:29,512 INFO L130 PetriNetUnfolder]: For 1874/1874 co-relation queries the response was YES. [2022-07-13 22:12:29,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29492 conditions, 14367 events. 9402/14367 cut-off events. For 1874/1874 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 103839 event pairs, 7029 based on Foata normal form. 225/11694 useless extension candidates. Maximal degree in co-relation 29487. Up to 10130 conditions per place. [2022-07-13 22:12:29,640 INFO L132 encePairwiseOnDemand]: 186/195 looper letters, 41 selfloop transitions, 6 changer transitions 36/203 dead transitions. [2022-07-13 22:12:29,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 203 transitions, 613 flow [2022-07-13 22:12:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:12:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:12:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1227 transitions. [2022-07-13 22:12:29,645 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7865384615384615 [2022-07-13 22:12:29,645 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1227 transitions. [2022-07-13 22:12:29,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1227 transitions. [2022-07-13 22:12:29,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:29,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1227 transitions. [2022-07-13 22:12:29,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 153.375) internal successors, (1227), 8 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:29,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:29,652 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:29,653 INFO L186 Difference]: Start difference. First operand has 170 places, 163 transitions, 352 flow. Second operand 8 states and 1227 transitions. [2022-07-13 22:12:29,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 203 transitions, 613 flow [2022-07-13 22:12:29,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 203 transitions, 604 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:12:29,660 INFO L242 Difference]: Finished difference. Result has 176 places, 164 transitions, 368 flow [2022-07-13 22:12:29,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=176, PETRI_TRANSITIONS=164} [2022-07-13 22:12:29,661 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, -1 predicate places. [2022-07-13 22:12:29,661 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 164 transitions, 368 flow [2022-07-13 22:12:29,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:29,662 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:29,662 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:29,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:12:29,663 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 3 more)] === [2022-07-13 22:12:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1019555897, now seen corresponding path program 1 times [2022-07-13 22:12:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:29,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407391986] [2022-07-13 22:12:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:12:29,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407391986] [2022-07-13 22:12:29,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407391986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221030040] [2022-07-13 22:12:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:29,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:29,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:29,825 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) [2022-07-13 22:12:29,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:12:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:29,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:12:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:12:30,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:12:30,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221030040] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:30,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:12:30,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-13 22:12:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513387315] [2022-07-13 22:12:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:12:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:12:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:12:30,277 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-13 22:12:30,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 164 transitions, 368 flow. Second operand has 7 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:30,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:30,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-13 22:12:30,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:31,491 INFO L129 PetriNetUnfolder]: 7854/13534 cut-off events. [2022-07-13 22:12:31,491 INFO L130 PetriNetUnfolder]: For 1202/1534 co-relation queries the response was YES. [2022-07-13 22:12:31,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26210 conditions, 13534 events. 7854/13534 cut-off events. For 1202/1534 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 107821 event pairs, 5557 based on Foata normal form. 332/11650 useless extension candidates. Maximal degree in co-relation 26202. Up to 4879 conditions per place. [2022-07-13 22:12:31,574 INFO L132 encePairwiseOnDemand]: 187/195 looper letters, 52 selfloop transitions, 7 changer transitions 0/180 dead transitions. [2022-07-13 22:12:31,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 180 transitions, 526 flow [2022-07-13 22:12:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:12:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:12:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1060 transitions. [2022-07-13 22:12:31,577 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765567765567766 [2022-07-13 22:12:31,577 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1060 transitions. [2022-07-13 22:12:31,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1060 transitions. [2022-07-13 22:12:31,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:31,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1060 transitions. [2022-07-13 22:12:31,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.42857142857142) internal successors, (1060), 7 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:31,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:31,582 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:31,582 INFO L186 Difference]: Start difference. First operand has 176 places, 164 transitions, 368 flow. Second operand 7 states and 1060 transitions. [2022-07-13 22:12:31,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 180 transitions, 526 flow [2022-07-13 22:12:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 180 transitions, 510 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-13 22:12:31,589 INFO L242 Difference]: Finished difference. Result has 177 places, 166 transitions, 387 flow [2022-07-13 22:12:31,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=177, PETRI_TRANSITIONS=166} [2022-07-13 22:12:31,590 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 0 predicate places. [2022-07-13 22:12:31,590 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 166 transitions, 387 flow [2022-07-13 22:12:31,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:31,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:31,591 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:31,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:31,807 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 [2022-07-13 22:12:31,808 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 3 more)] === [2022-07-13 22:12:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:31,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1556197859, now seen corresponding path program 1 times [2022-07-13 22:12:31,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:31,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977451372] [2022-07-13 22:12:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:12:31,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977451372] [2022-07-13 22:12:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977451372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991333994] [2022-07-13 22:12:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:31,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:31,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:31,902 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) [2022-07-13 22:12:31,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:12:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:32,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:12:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:12:32,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:12:32,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991333994] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:32,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:12:32,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-13 22:12:32,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96431563] [2022-07-13 22:12:32,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:32,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:12:32,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:12:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:12:32,216 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-13 22:12:32,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 166 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 148.14285714285714) internal successors, (1037), 7 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:32,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:32,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-13 22:12:32,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:33,094 INFO L129 PetriNetUnfolder]: 8314/12454 cut-off events. [2022-07-13 22:12:33,095 INFO L130 PetriNetUnfolder]: For 2714/4283 co-relation queries the response was YES. [2022-07-13 22:12:33,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26590 conditions, 12454 events. 8314/12454 cut-off events. For 2714/4283 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 83056 event pairs, 3015 based on Foata normal form. 1569/12297 useless extension candidates. Maximal degree in co-relation 26581. Up to 5481 conditions per place. [2022-07-13 22:12:33,189 INFO L132 encePairwiseOnDemand]: 187/195 looper letters, 54 selfloop transitions, 7 changer transitions 0/182 dead transitions. [2022-07-13 22:12:33,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 182 transitions, 555 flow [2022-07-13 22:12:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:12:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:12:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1060 transitions. [2022-07-13 22:12:33,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765567765567766 [2022-07-13 22:12:33,191 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1060 transitions. [2022-07-13 22:12:33,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1060 transitions. [2022-07-13 22:12:33,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:33,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1060 transitions. [2022-07-13 22:12:33,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.42857142857142) internal successors, (1060), 7 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:33,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:33,196 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:33,196 INFO L186 Difference]: Start difference. First operand has 177 places, 166 transitions, 387 flow. Second operand 7 states and 1060 transitions. [2022-07-13 22:12:33,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 182 transitions, 555 flow [2022-07-13 22:12:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 182 transitions, 546 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:12:33,199 INFO L242 Difference]: Finished difference. Result has 181 places, 167 transitions, 406 flow [2022-07-13 22:12:33,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=181, PETRI_TRANSITIONS=167} [2022-07-13 22:12:33,200 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 4 predicate places. [2022-07-13 22:12:33,200 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 167 transitions, 406 flow [2022-07-13 22:12:33,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.14285714285714) internal successors, (1037), 7 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:33,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:33,201 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:33,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:33,420 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 [2022-07-13 22:12:33,420 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 3 more)] === [2022-07-13 22:12:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash 627197613, now seen corresponding path program 1 times [2022-07-13 22:12:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:33,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905447632] [2022-07-13 22:12:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:33,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:33,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:33,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905447632] [2022-07-13 22:12:33,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905447632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:33,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115704195] [2022-07-13 22:12:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:33,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:33,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:33,475 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) [2022-07-13 22:12:33,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:12:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:12:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:33,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:33,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115704195] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:33,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:12:33,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 14 [2022-07-13 22:12:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199573939] [2022-07-13 22:12:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:12:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:12:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:12:33,884 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-13 22:12:33,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 167 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 148.42857142857142) internal successors, (1039), 7 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:33,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:33,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-13 22:12:33,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:35,218 INFO L129 PetriNetUnfolder]: 8648/15503 cut-off events. [2022-07-13 22:12:35,218 INFO L130 PetriNetUnfolder]: For 5487/8491 co-relation queries the response was YES. [2022-07-13 22:12:35,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32397 conditions, 15503 events. 8648/15503 cut-off events. For 5487/8491 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 128036 event pairs, 4061 based on Foata normal form. 3004/17667 useless extension candidates. Maximal degree in co-relation 32386. Up to 6489 conditions per place. [2022-07-13 22:12:35,372 INFO L132 encePairwiseOnDemand]: 187/195 looper letters, 57 selfloop transitions, 7 changer transitions 0/185 dead transitions. [2022-07-13 22:12:35,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 185 transitions, 591 flow [2022-07-13 22:12:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:12:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:12:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1061 transitions. [2022-07-13 22:12:35,375 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772893772893773 [2022-07-13 22:12:35,375 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1061 transitions. [2022-07-13 22:12:35,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1061 transitions. [2022-07-13 22:12:35,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:35,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1061 transitions. [2022-07-13 22:12:35,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.57142857142858) internal successors, (1061), 7 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:35,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:35,380 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:35,380 INFO L186 Difference]: Start difference. First operand has 181 places, 167 transitions, 406 flow. Second operand 7 states and 1061 transitions. [2022-07-13 22:12:35,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 185 transitions, 591 flow [2022-07-13 22:12:35,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 185 transitions, 580 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-13 22:12:35,388 INFO L242 Difference]: Finished difference. Result has 184 places, 168 transitions, 423 flow [2022-07-13 22:12:35,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=184, PETRI_TRANSITIONS=168} [2022-07-13 22:12:35,390 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 7 predicate places. [2022-07-13 22:12:35,391 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 168 transitions, 423 flow [2022-07-13 22:12:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.42857142857142) internal successors, (1039), 7 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:35,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:35,393 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:35,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:35,595 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 [2022-07-13 22:12:35,596 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 3 more)] === [2022-07-13 22:12:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 920082601, now seen corresponding path program 1 times [2022-07-13 22:12:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:35,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118792353] [2022-07-13 22:12:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:35,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:35,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118792353] [2022-07-13 22:12:35,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118792353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:35,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637868742] [2022-07-13 22:12:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:35,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:35,824 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) [2022-07-13 22:12:35,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:12:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 22:12:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:36,190 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 [2022-07-13 22:12:36,300 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 [2022-07-13 22:12:36,333 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 [2022-07-13 22:12:36,357 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 [2022-07-13 22:12:36,431 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 [2022-07-13 22:12:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:12:36,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:36,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637868742] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:36,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:12:36,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 21] total 31 [2022-07-13 22:12:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971587305] [2022-07-13 22:12:36,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:36,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 22:12:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 22:12:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-07-13 22:12:36,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 195 [2022-07-13 22:12:36,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 168 transitions, 423 flow. Second operand has 10 states, 10 states have (on average 126.1) internal successors, (1261), 10 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:36,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:36,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 195 [2022-07-13 22:12:36,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:44,849 INFO L129 PetriNetUnfolder]: 45433/78393 cut-off events. [2022-07-13 22:12:44,850 INFO L130 PetriNetUnfolder]: For 29387/29387 co-relation queries the response was YES. [2022-07-13 22:12:45,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164901 conditions, 78393 events. 45433/78393 cut-off events. For 29387/29387 co-relation queries the response was YES. Maximal size of possible extension queue 3097. Compared 748297 event pairs, 8635 based on Foata normal form. 2/76772 useless extension candidates. Maximal degree in co-relation 164888. Up to 15885 conditions per place. [2022-07-13 22:12:45,502 INFO L132 encePairwiseOnDemand]: 179/195 looper letters, 242 selfloop transitions, 37 changer transitions 27/411 dead transitions. [2022-07-13 22:12:45,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 411 transitions, 1757 flow [2022-07-13 22:12:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:12:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 22:12:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2092 transitions. [2022-07-13 22:12:45,506 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7152136752136752 [2022-07-13 22:12:45,506 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2092 transitions. [2022-07-13 22:12:45,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2092 transitions. [2022-07-13 22:12:45,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:45,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2092 transitions. [2022-07-13 22:12:45,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 139.46666666666667) internal successors, (2092), 15 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:45,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 195.0) internal successors, (3120), 16 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:45,514 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 195.0) internal successors, (3120), 16 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:45,514 INFO L186 Difference]: Start difference. First operand has 184 places, 168 transitions, 423 flow. Second operand 15 states and 2092 transitions. [2022-07-13 22:12:45,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 411 transitions, 1757 flow [2022-07-13 22:12:45,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 411 transitions, 1747 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-13 22:12:45,811 INFO L242 Difference]: Finished difference. Result has 207 places, 208 transitions, 713 flow [2022-07-13 22:12:45,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=713, PETRI_PLACES=207, PETRI_TRANSITIONS=208} [2022-07-13 22:12:45,812 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 30 predicate places. [2022-07-13 22:12:45,812 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 208 transitions, 713 flow [2022-07-13 22:12:45,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 126.1) internal successors, (1261), 10 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:45,812 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:45,813 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:45,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:46,029 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 [2022-07-13 22:12:46,030 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 3 more)] === [2022-07-13 22:12:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:46,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1803577397, now seen corresponding path program 2 times [2022-07-13 22:12:46,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:46,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403358102] [2022-07-13 22:12:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:46,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403358102] [2022-07-13 22:12:46,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403358102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584081426] [2022-07-13 22:12:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:12:46,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:46,228 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) [2022-07-13 22:12:46,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:12:46,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:12:46,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:12:46,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:46,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:46,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584081426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:46,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:46,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-07-13 22:12:46,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020003678] [2022-07-13 22:12:46,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:12:46,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:12:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:12:46,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 195 [2022-07-13 22:12:46,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 208 transitions, 713 flow. Second operand has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:46,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:46,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 195 [2022-07-13 22:12:46,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:48,627 INFO L129 PetriNetUnfolder]: 5748/14645 cut-off events. [2022-07-13 22:12:48,627 INFO L130 PetriNetUnfolder]: For 22735/25272 co-relation queries the response was YES. [2022-07-13 22:12:48,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39130 conditions, 14645 events. 5748/14645 cut-off events. For 22735/25272 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 149776 event pairs, 966 based on Foata normal form. 192/14069 useless extension candidates. Maximal degree in co-relation 39104. Up to 4517 conditions per place. [2022-07-13 22:12:48,775 INFO L132 encePairwiseOnDemand]: 189/195 looper letters, 104 selfloop transitions, 6 changer transitions 5/268 dead transitions. [2022-07-13 22:12:48,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 268 transitions, 1250 flow [2022-07-13 22:12:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:12:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:12:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1080 transitions. [2022-07-13 22:12:48,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912087912087912 [2022-07-13 22:12:48,777 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1080 transitions. [2022-07-13 22:12:48,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1080 transitions. [2022-07-13 22:12:48,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:48,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1080 transitions. [2022-07-13 22:12:48,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:48,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:48,782 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:48,782 INFO L186 Difference]: Start difference. First operand has 207 places, 208 transitions, 713 flow. Second operand 7 states and 1080 transitions. [2022-07-13 22:12:48,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 268 transitions, 1250 flow [2022-07-13 22:12:48,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 268 transitions, 1238 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-07-13 22:12:48,837 INFO L242 Difference]: Finished difference. Result has 209 places, 212 transitions, 757 flow [2022-07-13 22:12:48,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=757, PETRI_PLACES=209, PETRI_TRANSITIONS=212} [2022-07-13 22:12:48,838 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 32 predicate places. [2022-07-13 22:12:48,838 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 212 transitions, 757 flow [2022-07-13 22:12:48,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:48,839 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:48,839 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:48,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 22:12:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:49,043 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 22:12:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1409737673, now seen corresponding path program 3 times [2022-07-13 22:12:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:49,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107237655] [2022-07-13 22:12:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:49,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:12:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:49,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107237655] [2022-07-13 22:12:49,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107237655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:49,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725195381] [2022-07-13 22:12:49,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:12:49,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:49,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:49,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:12:49,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:12:49,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:12:49,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 22:12:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:49,543 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 [2022-07-13 22:12:49,660 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 [2022-07-13 22:12:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:12:49,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:12:50,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725195381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:50,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:50,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 10] total 31 [2022-07-13 22:12:50,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692914875] [2022-07-13 22:12:50,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 22:12:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 22:12:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-07-13 22:12:50,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2022-07-13 22:12:50,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 212 transitions, 757 flow. Second operand has 31 states, 31 states have (on average 104.19354838709677) internal successors, (3230), 31 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:50,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:50,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2022-07-13 22:12:50,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand