./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy1.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/test-easy1.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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:22:19,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:22:19,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:22:19,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:22:19,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:22:19,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:22:19,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:22:19,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:22:19,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:22:19,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:22:19,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:22:19,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:22:19,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:22:19,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:22:19,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:22:19,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:22:19,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:22:19,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:22:19,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:22:19,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:22:19,729 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:22:19,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:22:19,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:22:19,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:22:19,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:22:19,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:22:19,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:22:19,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:22:19,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:22:19,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:22:19,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:22:19,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:22:19,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:22:19,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:22:19,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:22:19,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:22:19,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:22:19,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:22:19,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:22:19,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:22:19,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:22:19,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:22:19,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:22:19,780 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:22:19,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:22:19,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:22:19,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:22:19,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:22:19,782 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:22:19,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:22:19,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:22:19,782 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:22:19,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:22:19,783 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:22:19,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:22:19,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:22:19,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:22:19,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:22:19,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:22:19,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:22:19,785 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:22:19,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:22:19,785 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:22:19,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:22:19,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:22:19,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:22:19,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:22:19,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:22:19,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:22:19,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:22:19,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:22:19,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:22:19,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:22:19,788 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:22:19,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:22:19,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:22:19,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-07-13 22:22:20,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:22:20,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:22:20,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:22:20,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:22:20,077 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:22:20,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-07-13 22:22:20,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100752cc8/1151289368ab4213a9f9931d3ad60dcf/FLAGae6856876 [2022-07-13 22:22:20,532 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:22:20,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-07-13 22:22:20,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100752cc8/1151289368ab4213a9f9931d3ad60dcf/FLAGae6856876 [2022-07-13 22:22:20,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/100752cc8/1151289368ab4213a9f9931d3ad60dcf [2022-07-13 22:22:20,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:22:20,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:22:20,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:22:20,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:22:20,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:22:20,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:22:20" (1/1) ... [2022-07-13 22:22:20,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec77463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:20, skipping insertion in model container [2022-07-13 22:22:20,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:22:20" (1/1) ... [2022-07-13 22:22:20,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:22:20,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:22:21,144 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/test-easy1.wvr.c[1876,1889] [2022-07-13 22:22:21,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:22:21,153 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:22:21,182 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/test-easy1.wvr.c[1876,1889] [2022-07-13 22:22:21,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:22:21,200 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:22:21,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21 WrapperNode [2022-07-13 22:22:21,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:22:21,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:22:21,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:22:21,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:22:21,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,235 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-07-13 22:22:21,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:22:21,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:22:21,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:22:21,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:22:21,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:22:21,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:22:21,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:22:21,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:22:21,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (1/1) ... [2022-07-13 22:22:21,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:22:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:21,312 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 22:22:21,345 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 22:22:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:22:21,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:22:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:22:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:22:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:22:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:22:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:22:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:22:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:22:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:22:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:22:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:22:21,365 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 22:22:21,448 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:22:21,449 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:22:21,624 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:22:21,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:22:21,631 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 22:22:21,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:22:21 BoogieIcfgContainer [2022-07-13 22:22:21,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:22:21,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:22:21,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:22:21,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:22:21,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:22:20" (1/3) ... [2022-07-13 22:22:21,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df1e3cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:22:21, skipping insertion in model container [2022-07-13 22:22:21,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:22:21" (2/3) ... [2022-07-13 22:22:21,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df1e3cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:22:21, skipping insertion in model container [2022-07-13 22:22:21,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:22:21" (3/3) ... [2022-07-13 22:22:21,641 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-07-13 22:22:21,645 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:22:21,653 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:22:21,653 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:22:21,654 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:22:21,705 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:22:21,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-07-13 22:22:21,800 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-13 22:22:21,801 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:22:21,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-07-13 22:22:21,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-07-13 22:22:21,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-07-13 22:22:21,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:22:21,822 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@7c7a7655, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@bf69d6f [2022-07-13 22:22:21,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:22:21,836 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2022-07-13 22:22:21,837 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:22:21,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:21,838 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] [2022-07-13 22:22:21,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1829802854, now seen corresponding path program 1 times [2022-07-13 22:22:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:21,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853238436] [2022-07-13 22:22:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:21,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:22,023 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 22:22:22,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:22,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853238436] [2022-07-13 22:22:22,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853238436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:22,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:22:22,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:22:22,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910796798] [2022-07-13 22:22:22,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:22,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:22:22,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:22:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:22:22,058 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-07-13 22:22:22,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 22:22:22,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:22,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-07-13 22:22:22,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:22,103 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2022-07-13 22:22:22,106 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:22:22,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-07-13 22:22:22,108 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-07-13 22:22:22,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-07-13 22:22:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:22:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:22:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-07-13 22:22:22,123 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-07-13 22:22:22,124 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-07-13 22:22:22,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-07-13 22:22:22,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:22,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-07-13 22:22:22,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 22:22:22,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 22:22:22,154 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 22:22:22,156 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-07-13 22:22:22,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-07-13 22:22:22,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:22:22,168 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-07-13 22:22:22,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-07-13 22:22:22,176 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-07-13 22:22:22,176 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-07-13 22:22:22,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 22:22:22,177 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:22,178 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] [2022-07-13 22:22:22,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:22:22,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2022-07-13 22:22:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:22,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897077237] [2022-07-13 22:22:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:22,516 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 22:22:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897077237] [2022-07-13 22:22:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897077237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:22,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:22:22,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:22:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320743081] [2022-07-13 22:22:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:22,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:22:22,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:22,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:22:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:22:22,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-13 22:22:22,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 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 22:22:22,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:22,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-13 22:22:22,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:22,734 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2022-07-13 22:22:22,739 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2022-07-13 22:22:22,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 733 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2022-07-13 22:22:22,743 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-07-13 22:22:22,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-07-13 22:22:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:22:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:22:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-07-13 22:22:22,750 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-07-13 22:22:22,750 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-07-13 22:22:22,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-07-13 22:22:22,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:22,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-07-13 22:22:22,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 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 22:22:22,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 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 22:22:22,758 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 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 22:22:22,758 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-07-13 22:22:22,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-07-13 22:22:22,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:22:22,762 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-07-13 22:22:22,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-07-13 22:22:22,763 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-07-13 22:22:22,763 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-07-13 22:22:22,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 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 22:22:22,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:22,764 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] [2022-07-13 22:22:22,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:22:22,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2022-07-13 22:22:22,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:22,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869872197] [2022-07-13 22:22:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:22,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:22,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869872197] [2022-07-13 22:22:22,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869872197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402593343] [2022-07-13 22:22:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:22,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:22,934 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 22:22:22,935 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 22:22:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:23,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 22:22:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:23,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:23,468 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 22:22:23,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402593343] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:23,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:22:23,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-07-13 22:22:23,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839807490] [2022-07-13 22:22:23,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:23,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:22:23,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:23,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:22:23,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-13 22:22:23,473 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-13 22:22:23,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 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 22:22:23,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:23,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-13 22:22:23,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:23,601 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2022-07-13 22:22:23,602 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2022-07-13 22:22:23,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 974 event pairs, 22 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2022-07-13 22:22:23,606 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2022-07-13 22:22:23,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2022-07-13 22:22:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:22:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:22:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-07-13 22:22:23,608 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-07-13 22:22:23,608 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-07-13 22:22:23,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-07-13 22:22:23,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:23,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-07-13 22:22:23,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 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 22:22:23,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 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 22:22:23,611 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 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 22:22:23,612 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2022-07-13 22:22:23,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2022-07-13 22:22:23,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-13 22:22:23,616 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2022-07-13 22:22:23,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2022-07-13 22:22:23,618 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-07-13 22:22:23,618 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2022-07-13 22:22:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 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 22:22:23,618 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:23,619 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] [2022-07-13 22:22:23,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 22:22:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:23,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-07-13 22:22:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919725379] [2022-07-13 22:22:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:23,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:23,966 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 22:22:23,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919725379] [2022-07-13 22:22:23,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919725379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:23,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:22:23,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:22:23,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89402479] [2022-07-13 22:22:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:22:23,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:22:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:22:23,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-13 22:22:23,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 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 22:22:23,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:23,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-13 22:22:23,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:24,065 INFO L129 PetriNetUnfolder]: 55/228 cut-off events. [2022-07-13 22:22:24,068 INFO L130 PetriNetUnfolder]: For 141/155 co-relation queries the response was YES. [2022-07-13 22:22:24,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 228 events. 55/228 cut-off events. For 141/155 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 860 event pairs, 7 based on Foata normal form. 5/229 useless extension candidates. Maximal degree in co-relation 486. Up to 94 conditions per place. [2022-07-13 22:22:24,071 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2022-07-13 22:22:24,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2022-07-13 22:22:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:22:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:22:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-07-13 22:22:24,073 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-07-13 22:22:24,073 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-07-13 22:22:24,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-07-13 22:22:24,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:24,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-07-13 22:22:24,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 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 22:22:24,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 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 22:22:24,077 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 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 22:22:24,078 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2022-07-13 22:22:24,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2022-07-13 22:22:24,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:22:24,095 INFO L242 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2022-07-13 22:22:24,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2022-07-13 22:22:24,096 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2022-07-13 22:22:24,096 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2022-07-13 22:22:24,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 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 22:22:24,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:24,097 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] [2022-07-13 22:22:24,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:22:24,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash 849329763, now seen corresponding path program 1 times [2022-07-13 22:22:24,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:24,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407601987] [2022-07-13 22:22:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:24,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:24,220 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 22:22:24,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:24,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407601987] [2022-07-13 22:22:24,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407601987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:24,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:22:24,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:22:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936455102] [2022-07-13 22:22:24,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:24,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:22:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:22:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:22:24,225 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-07-13 22:22:24,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 22:22:24,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:24,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-07-13 22:22:24,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:24,322 INFO L129 PetriNetUnfolder]: 50/221 cut-off events. [2022-07-13 22:22:24,322 INFO L130 PetriNetUnfolder]: For 204/208 co-relation queries the response was YES. [2022-07-13 22:22:24,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 221 events. 50/221 cut-off events. For 204/208 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 751 event pairs, 9 based on Foata normal form. 8/225 useless extension candidates. Maximal degree in co-relation 500. Up to 57 conditions per place. [2022-07-13 22:22:24,324 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2022-07-13 22:22:24,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2022-07-13 22:22:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:22:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:22:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2022-07-13 22:22:24,329 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2022-07-13 22:22:24,329 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2022-07-13 22:22:24,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2022-07-13 22:22:24,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:24,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2022-07-13 22:22:24,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.57142857142857) internal successors, (417), 7 states have internal predecessors, (417), 0 states have call successors, (0), 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 22:22:24,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 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 22:22:24,332 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 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 22:22:24,332 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2022-07-13 22:22:24,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2022-07-13 22:22:24,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-13 22:22:24,339 INFO L242 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2022-07-13 22:22:24,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2022-07-13 22:22:24,341 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-07-13 22:22:24,341 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2022-07-13 22:22:24,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 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 22:22:24,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:24,342 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] [2022-07-13 22:22:24,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:22:24,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1240332628, now seen corresponding path program 1 times [2022-07-13 22:22:24,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:24,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850878866] [2022-07-13 22:22:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:24,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850878866] [2022-07-13 22:22:24,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850878866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120461667] [2022-07-13 22:22:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:24,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:24,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:24,506 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 22:22:24,507 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 22:22:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:24,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 22:22:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:24,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:25,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120461667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:25,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:25,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-13 22:22:25,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234617900] [2022-07-13 22:22:25,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:25,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:22:25,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:22:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:22:25,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:25,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 273 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 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 22:22:25,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:25,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:25,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:26,928 INFO L129 PetriNetUnfolder]: 201/618 cut-off events. [2022-07-13 22:22:26,928 INFO L130 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-07-13 22:22:26,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1725 conditions, 618 events. 201/618 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3354 event pairs, 7 based on Foata normal form. 18/633 useless extension candidates. Maximal degree in co-relation 1713. Up to 96 conditions per place. [2022-07-13 22:22:26,940 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 105 selfloop transitions, 136 changer transitions 4/286 dead transitions. [2022-07-13 22:22:26,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 286 transitions, 1774 flow [2022-07-13 22:22:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-13 22:22:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-13 22:22:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3453 transitions. [2022-07-13 22:22:26,956 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6524943310657596 [2022-07-13 22:22:26,956 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3453 transitions. [2022-07-13 22:22:26,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3453 transitions. [2022-07-13 22:22:26,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:26,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3453 transitions. [2022-07-13 22:22:26,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.80952380952381) internal successors, (3453), 63 states have internal predecessors, (3453), 0 states have call successors, (0), 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 22:22:26,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 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 22:22:26,975 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 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 22:22:26,976 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 63 states and 3453 transitions. [2022-07-13 22:22:26,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 286 transitions, 1774 flow [2022-07-13 22:22:26,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 1745 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-13 22:22:26,985 INFO L242 Difference]: Finished difference. Result has 165 places, 217 transitions, 1436 flow [2022-07-13 22:22:26,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1436, PETRI_PLACES=165, PETRI_TRANSITIONS=217} [2022-07-13 22:22:26,986 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 91 predicate places. [2022-07-13 22:22:26,987 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 1436 flow [2022-07-13 22:22:26,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 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 22:22:26,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:26,988 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] [2022-07-13 22:22:27,014 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 22:22:27,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 22:22:27,204 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash -517489446, now seen corresponding path program 2 times [2022-07-13 22:22:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:27,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399055350] [2022-07-13 22:22:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:27,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:27,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399055350] [2022-07-13 22:22:27,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399055350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:27,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059342568] [2022-07-13 22:22:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:22:27,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:27,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:27,333 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 22:22:27,364 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 22:22:27,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:22:27,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 22:22:27,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:27,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:27,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059342568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:27,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:27,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-07-13 22:22:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082283545] [2022-07-13 22:22:27,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:27,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 22:22:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 22:22:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:22:27,794 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:27,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 217 transitions, 1436 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 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 22:22:27,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:27,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:27,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:28,266 INFO L129 PetriNetUnfolder]: 225/682 cut-off events. [2022-07-13 22:22:28,266 INFO L130 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2022-07-13 22:22:28,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 682 events. 225/682 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3920 event pairs, 20 based on Foata normal form. 1/678 useless extension candidates. Maximal degree in co-relation 2755. Up to 180 conditions per place. [2022-07-13 22:22:28,275 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 80 selfloop transitions, 170 changer transitions 15/306 dead transitions. [2022-07-13 22:22:28,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 2719 flow [2022-07-13 22:22:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 22:22:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-13 22:22:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2022-07-13 22:22:28,278 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6505952380952381 [2022-07-13 22:22:28,279 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2022-07-13 22:22:28,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2022-07-13 22:22:28,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:28,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2022-07-13 22:22:28,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.65) internal successors, (1093), 20 states have internal predecessors, (1093), 0 states have call successors, (0), 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 22:22:28,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 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 22:22:28,285 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 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 22:22:28,285 INFO L186 Difference]: Start difference. First operand has 165 places, 217 transitions, 1436 flow. Second operand 20 states and 1093 transitions. [2022-07-13 22:22:28,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 2719 flow [2022-07-13 22:22:28,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 2517 flow, removed 88 selfloop flow, removed 7 redundant places. [2022-07-13 22:22:28,312 INFO L242 Difference]: Finished difference. Result has 182 places, 270 transitions, 2130 flow [2022-07-13 22:22:28,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2130, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2022-07-13 22:22:28,313 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2022-07-13 22:22:28,314 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2130 flow [2022-07-13 22:22:28,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 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 22:22:28,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:28,314 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] [2022-07-13 22:22:28,341 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 22:22:28,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:28,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1446740796, now seen corresponding path program 3 times [2022-07-13 22:22:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541460028] [2022-07-13 22:22:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:28,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:28,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541460028] [2022-07-13 22:22:28,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541460028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:28,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407129476] [2022-07-13 22:22:28,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:22:28,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:28,646 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 22:22:28,646 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 22:22:28,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:22:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 22:22:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:28,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:29,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407129476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:29,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:29,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-13 22:22:29,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866519679] [2022-07-13 22:22:29,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:29,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:22:29,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:29,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:22:29,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:22:29,146 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:29,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2130 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 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 22:22:29,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:29,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:29,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:30,604 INFO L129 PetriNetUnfolder]: 361/1083 cut-off events. [2022-07-13 22:22:30,606 INFO L130 PetriNetUnfolder]: For 6545/6545 co-relation queries the response was YES. [2022-07-13 22:22:30,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1083 events. 361/1083 cut-off events. For 6545/6545 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7292 event pairs, 3 based on Foata normal form. 26/1108 useless extension candidates. Maximal degree in co-relation 4778. Up to 167 conditions per place. [2022-07-13 22:22:30,619 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 170 selfloop transitions, 270 changer transitions 79/560 dead transitions. [2022-07-13 22:22:30,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 560 transitions, 5808 flow [2022-07-13 22:22:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 22:22:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-13 22:22:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2022-07-13 22:22:30,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2022-07-13 22:22:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2022-07-13 22:22:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2022-07-13 22:22:30,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:30,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2022-07-13 22:22:30,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 states have internal predecessors, (2524), 0 states have call successors, (0), 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 22:22:30,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 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 22:22:30,659 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 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 22:22:30,659 INFO L186 Difference]: Start difference. First operand has 182 places, 270 transitions, 2130 flow. Second operand 46 states and 2524 transitions. [2022-07-13 22:22:30,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 560 transitions, 5808 flow [2022-07-13 22:22:30,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 560 transitions, 5385 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-07-13 22:22:30,709 INFO L242 Difference]: Finished difference. Result has 243 places, 426 transitions, 4246 flow [2022-07-13 22:22:30,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4246, PETRI_PLACES=243, PETRI_TRANSITIONS=426} [2022-07-13 22:22:30,711 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 169 predicate places. [2022-07-13 22:22:30,711 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 426 transitions, 4246 flow [2022-07-13 22:22:30,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 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 22:22:30,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:30,712 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] [2022-07-13 22:22:30,738 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 22:22:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:30,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1847654156, now seen corresponding path program 4 times [2022-07-13 22:22:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:30,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101646106] [2022-07-13 22:22:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:31,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:31,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101646106] [2022-07-13 22:22:31,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101646106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:31,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:22:31,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 22:22:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744334110] [2022-07-13 22:22:31,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 22:22:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:31,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 22:22:31,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-13 22:22:31,044 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:31,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 426 transitions, 4246 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 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 22:22:31,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:31,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:31,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:31,476 INFO L129 PetriNetUnfolder]: 314/867 cut-off events. [2022-07-13 22:22:31,476 INFO L130 PetriNetUnfolder]: For 7979/7979 co-relation queries the response was YES. [2022-07-13 22:22:31,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4847 conditions, 867 events. 314/867 cut-off events. For 7979/7979 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4955 event pairs, 15 based on Foata normal form. 1/864 useless extension candidates. Maximal degree in co-relation 4784. Up to 279 conditions per place. [2022-07-13 22:22:31,489 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 175 selfloop transitions, 295 changer transitions 6/517 dead transitions. [2022-07-13 22:22:31,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 517 transitions, 6195 flow [2022-07-13 22:22:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 22:22:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 22:22:31,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1197 transitions. [2022-07-13 22:22:31,492 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2022-07-13 22:22:31,492 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1197 transitions. [2022-07-13 22:22:31,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1197 transitions. [2022-07-13 22:22:31,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:31,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1197 transitions. [2022-07-13 22:22:31,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.40909090909091) internal successors, (1197), 22 states have internal predecessors, (1197), 0 states have call successors, (0), 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 22:22:31,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 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 22:22:31,500 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 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 22:22:31,500 INFO L186 Difference]: Start difference. First operand has 243 places, 426 transitions, 4246 flow. Second operand 22 states and 1197 transitions. [2022-07-13 22:22:31,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 517 transitions, 6195 flow [2022-07-13 22:22:31,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 5917 flow, removed 63 selfloop flow, removed 19 redundant places. [2022-07-13 22:22:31,577 INFO L242 Difference]: Finished difference. Result has 246 places, 500 transitions, 5637 flow [2022-07-13 22:22:31,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5637, PETRI_PLACES=246, PETRI_TRANSITIONS=500} [2022-07-13 22:22:31,579 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2022-07-13 22:22:31,579 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 500 transitions, 5637 flow [2022-07-13 22:22:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 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 22:22:31,580 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:31,580 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] [2022-07-13 22:22:31,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:22:31,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:31,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1989198950, now seen corresponding path program 5 times [2022-07-13 22:22:31,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:31,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958599421] [2022-07-13 22:22:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:31,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:31,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958599421] [2022-07-13 22:22:31,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958599421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195404330] [2022-07-13 22:22:31,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:22:31,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:31,717 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 22:22:31,751 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 22:22:31,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:22:31,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:22:31,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:31,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:32,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195404330] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:32,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:32,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-07-13 22:22:32,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791992360] [2022-07-13 22:22:32,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:32,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 22:22:32,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 22:22:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-13 22:22:32,117 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:32,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 500 transitions, 5637 flow. Second operand has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 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 22:22:32,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:32,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:32,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:33,003 INFO L129 PetriNetUnfolder]: 567/1570 cut-off events. [2022-07-13 22:22:33,003 INFO L130 PetriNetUnfolder]: For 13395/13395 co-relation queries the response was YES. [2022-07-13 22:22:33,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 1570 events. 567/1570 cut-off events. For 13395/13395 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11033 event pairs, 20 based on Foata normal form. 2/1566 useless extension candidates. Maximal degree in co-relation 9214. Up to 256 conditions per place. [2022-07-13 22:22:33,027 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 239 selfloop transitions, 614 changer transitions 38/932 dead transitions. [2022-07-13 22:22:33,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 932 transitions, 12681 flow [2022-07-13 22:22:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 22:22:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-13 22:22:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1756 transitions. [2022-07-13 22:22:33,033 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6532738095238095 [2022-07-13 22:22:33,033 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1756 transitions. [2022-07-13 22:22:33,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1756 transitions. [2022-07-13 22:22:33,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:33,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1756 transitions. [2022-07-13 22:22:33,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.875) internal successors, (1756), 32 states have internal predecessors, (1756), 0 states have call successors, (0), 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 22:22:33,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 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 22:22:33,041 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 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 22:22:33,041 INFO L186 Difference]: Start difference. First operand has 246 places, 500 transitions, 5637 flow. Second operand 32 states and 1756 transitions. [2022-07-13 22:22:33,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 932 transitions, 12681 flow [2022-07-13 22:22:33,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 12327 flow, removed 76 selfloop flow, removed 4 redundant places. [2022-07-13 22:22:33,194 INFO L242 Difference]: Finished difference. Result has 278 places, 794 transitions, 10901 flow [2022-07-13 22:22:33,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10901, PETRI_PLACES=278, PETRI_TRANSITIONS=794} [2022-07-13 22:22:33,196 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 204 predicate places. [2022-07-13 22:22:33,196 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 794 transitions, 10901 flow [2022-07-13 22:22:33,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 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 22:22:33,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:33,197 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] [2022-07-13 22:22:33,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:33,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 22:22:33,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1446076332, now seen corresponding path program 6 times [2022-07-13 22:22:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:33,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338653249] [2022-07-13 22:22:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:33,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:33,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338653249] [2022-07-13 22:22:33,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338653249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:33,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932217281] [2022-07-13 22:22:33,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:22:33,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:33,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:33,539 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 22:22:33,547 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 22:22:33,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-13 22:22:33,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:33,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 22:22:33,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:33,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:34,051 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 22:22:34,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932217281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:34,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:34,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-07-13 22:22:34,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476528086] [2022-07-13 22:22:34,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:34,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:22:34,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:34,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:22:34,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:22:34,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:34,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 794 transitions, 10901 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 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 22:22:34,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:34,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:34,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:35,872 INFO L129 PetriNetUnfolder]: 982/2553 cut-off events. [2022-07-13 22:22:35,873 INFO L130 PetriNetUnfolder]: For 29039/29039 co-relation queries the response was YES. [2022-07-13 22:22:35,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17090 conditions, 2553 events. 982/2553 cut-off events. For 29039/29039 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19674 event pairs, 12 based on Foata normal form. 28/2578 useless extension candidates. Maximal degree in co-relation 17022. Up to 408 conditions per place. [2022-07-13 22:22:35,918 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 300 selfloop transitions, 1101 changer transitions 20/1462 dead transitions. [2022-07-13 22:22:35,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1462 transitions, 22972 flow [2022-07-13 22:22:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 22:22:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-13 22:22:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2022-07-13 22:22:35,923 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2022-07-13 22:22:35,923 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2022-07-13 22:22:35,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2022-07-13 22:22:35,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:35,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2022-07-13 22:22:35,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 0 states have call successors, (0), 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 22:22:35,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 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 22:22:35,934 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 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 22:22:35,935 INFO L186 Difference]: Start difference. First operand has 278 places, 794 transitions, 10901 flow. Second operand 49 states and 2711 transitions. [2022-07-13 22:22:35,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1462 transitions, 22972 flow [2022-07-13 22:22:36,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1462 transitions, 21639 flow, removed 94 selfloop flow, removed 14 redundant places. [2022-07-13 22:22:36,252 INFO L242 Difference]: Finished difference. Result has 321 places, 1303 transitions, 20930 flow [2022-07-13 22:22:36,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=20930, PETRI_PLACES=321, PETRI_TRANSITIONS=1303} [2022-07-13 22:22:36,253 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-07-13 22:22:36,253 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 1303 transitions, 20930 flow [2022-07-13 22:22:36,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 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 22:22:36,254 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:36,255 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] [2022-07-13 22:22:36,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:36,460 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -481463372, now seen corresponding path program 7 times [2022-07-13 22:22:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:36,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154964658] [2022-07-13 22:22:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:36,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:36,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154964658] [2022-07-13 22:22:36,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154964658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:36,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:22:36,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-13 22:22:36,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445069899] [2022-07-13 22:22:36,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:36,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 22:22:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 22:22:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 22:22:36,565 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:36,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1303 transitions, 20930 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 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 22:22:36,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:36,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:36,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:37,837 INFO L129 PetriNetUnfolder]: 1036/2636 cut-off events. [2022-07-13 22:22:37,838 INFO L130 PetriNetUnfolder]: For 38102/38102 co-relation queries the response was YES. [2022-07-13 22:22:37,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20033 conditions, 2636 events. 1036/2636 cut-off events. For 38102/38102 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20206 event pairs, 35 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 19949. Up to 1358 conditions per place. [2022-07-13 22:22:37,897 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 930 selfloop transitions, 461 changer transitions 6/1438 dead transitions. [2022-07-13 22:22:37,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1438 transitions, 25804 flow [2022-07-13 22:22:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:22:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 22:22:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-07-13 22:22:37,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-07-13 22:22:37,900 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-07-13 22:22:37,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-07-13 22:22:37,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:37,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-07-13 22:22:37,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 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 22:22:37,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 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 22:22:37,908 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 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 22:22:37,908 INFO L186 Difference]: Start difference. First operand has 321 places, 1303 transitions, 20930 flow. Second operand 15 states and 824 transitions. [2022-07-13 22:22:37,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1438 transitions, 25804 flow [2022-07-13 22:22:38,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1438 transitions, 25588 flow, removed 82 selfloop flow, removed 10 redundant places. [2022-07-13 22:22:38,391 INFO L242 Difference]: Finished difference. Result has 332 places, 1402 transitions, 23575 flow [2022-07-13 22:22:38,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20730, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23575, PETRI_PLACES=332, PETRI_TRANSITIONS=1402} [2022-07-13 22:22:38,394 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 258 predicate places. [2022-07-13 22:22:38,394 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1402 transitions, 23575 flow [2022-07-13 22:22:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 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 22:22:38,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:38,394 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] [2022-07-13 22:22:38,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 22:22:38,395 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1161289794, now seen corresponding path program 8 times [2022-07-13 22:22:38,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697229515] [2022-07-13 22:22:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:38,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:38,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697229515] [2022-07-13 22:22:38,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697229515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:38,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972776923] [2022-07-13 22:22:38,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:22:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:38,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:38,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:38,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:22:38,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:22:38,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 22:22:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:38,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:22:38,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972776923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:38,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:22:38,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-13 22:22:38,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082196614] [2022-07-13 22:22:38,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:38,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:22:38,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:38,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:22:38,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:22:38,809 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:38,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1402 transitions, 23575 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:22:38,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:38,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:38,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:40,571 INFO L129 PetriNetUnfolder]: 1249/3243 cut-off events. [2022-07-13 22:22:40,571 INFO L130 PetriNetUnfolder]: For 54227/54227 co-relation queries the response was YES. [2022-07-13 22:22:40,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25398 conditions, 3243 events. 1249/3243 cut-off events. For 54227/54227 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26392 event pairs, 45 based on Foata normal form. 1/3232 useless extension candidates. Maximal degree in co-relation 25307. Up to 2238 conditions per place. [2022-07-13 22:22:40,627 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1458 selfloop transitions, 196 changer transitions 10/1705 dead transitions. [2022-07-13 22:22:40,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1705 transitions, 32235 flow [2022-07-13 22:22:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:22:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:22:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-07-13 22:22:40,629 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-07-13 22:22:40,629 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-07-13 22:22:40,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-07-13 22:22:40,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:40,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-07-13 22:22:40,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 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 22:22:40,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:40,633 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:22:40,633 INFO L186 Difference]: Start difference. First operand has 332 places, 1402 transitions, 23575 flow. Second operand 16 states and 910 transitions. [2022-07-13 22:22:40,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1705 transitions, 32235 flow [2022-07-13 22:22:41,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1705 transitions, 32025 flow, removed 105 selfloop flow, removed 3 redundant places. [2022-07-13 22:22:41,251 INFO L242 Difference]: Finished difference. Result has 351 places, 1567 transitions, 27236 flow [2022-07-13 22:22:41,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=27236, PETRI_PLACES=351, PETRI_TRANSITIONS=1567} [2022-07-13 22:22:41,252 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 277 predicate places. [2022-07-13 22:22:41,253 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1567 transitions, 27236 flow [2022-07-13 22:22:41,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:22:41,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:41,253 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] [2022-07-13 22:22:41,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:41,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:41,454 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash -623374472, now seen corresponding path program 9 times [2022-07-13 22:22:41,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:41,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124536542] [2022-07-13 22:22:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:41,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124536542] [2022-07-13 22:22:41,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124536542] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:41,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445034188] [2022-07-13 22:22:41,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:22:41,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:41,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:41,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:41,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:22:41,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:22:41,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:41,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 22:22:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:41,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:22:41,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445034188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:41,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:22:41,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-13 22:22:41,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879430335] [2022-07-13 22:22:41,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:41,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:22:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:22:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:22:41,839 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:41,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1567 transitions, 27236 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:22:41,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:41,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:41,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:43,586 INFO L129 PetriNetUnfolder]: 1328/3463 cut-off events. [2022-07-13 22:22:43,587 INFO L130 PetriNetUnfolder]: For 59706/59706 co-relation queries the response was YES. [2022-07-13 22:22:43,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27717 conditions, 3463 events. 1328/3463 cut-off events. For 59706/59706 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28760 event pairs, 57 based on Foata normal form. 2/3450 useless extension candidates. Maximal degree in co-relation 27618. Up to 2638 conditions per place. [2022-07-13 22:22:43,646 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1511 selfloop transitions, 137 changer transitions 13/1702 dead transitions. [2022-07-13 22:22:43,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1702 transitions, 32815 flow [2022-07-13 22:22:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 22:22:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-13 22:22:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-07-13 22:22:43,649 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-07-13 22:22:43,649 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-07-13 22:22:43,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-07-13 22:22:43,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:43,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-07-13 22:22:43,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 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 22:22:43,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 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 22:22:43,653 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 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 22:22:43,653 INFO L186 Difference]: Start difference. First operand has 351 places, 1567 transitions, 27236 flow. Second operand 18 states and 1006 transitions. [2022-07-13 22:22:43,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1702 transitions, 32815 flow [2022-07-13 22:22:44,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1702 transitions, 32671 flow, removed 56 selfloop flow, removed 6 redundant places. [2022-07-13 22:22:44,432 INFO L242 Difference]: Finished difference. Result has 369 places, 1646 transitions, 28995 flow [2022-07-13 22:22:44,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=27094, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=28995, PETRI_PLACES=369, PETRI_TRANSITIONS=1646} [2022-07-13 22:22:44,434 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 295 predicate places. [2022-07-13 22:22:44,434 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1646 transitions, 28995 flow [2022-07-13 22:22:44,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:22:44,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:44,435 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] [2022-07-13 22:22:44,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:44,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 22:22:44,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash 474873992, now seen corresponding path program 10 times [2022-07-13 22:22:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:44,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692532174] [2022-07-13 22:22:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:44,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:44,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692532174] [2022-07-13 22:22:44,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692532174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140243149] [2022-07-13 22:22:44,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:22:44,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:44,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:44,778 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:44,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:22:44,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:22:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 22:22:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:45,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:22:45,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140243149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:22:45,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:22:45,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-07-13 22:22:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69377445] [2022-07-13 22:22:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:22:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 22:22:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 22:22:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:22:45,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:45,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1646 transitions, 28995 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:22:45,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:45,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:45,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:47,028 INFO L129 PetriNetUnfolder]: 1417/3695 cut-off events. [2022-07-13 22:22:47,028 INFO L130 PetriNetUnfolder]: For 68812/68812 co-relation queries the response was YES. [2022-07-13 22:22:47,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30337 conditions, 3695 events. 1417/3695 cut-off events. For 68812/68812 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31284 event pairs, 74 based on Foata normal form. 1/3680 useless extension candidates. Maximal degree in co-relation 30230. Up to 2810 conditions per place. [2022-07-13 22:22:47,171 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1599 selfloop transitions, 153 changer transitions 10/1803 dead transitions. [2022-07-13 22:22:47,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1803 transitions, 35606 flow [2022-07-13 22:22:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 22:22:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 22:22:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1163 transitions. [2022-07-13 22:22:47,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.659297052154195 [2022-07-13 22:22:47,174 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1163 transitions. [2022-07-13 22:22:47,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1163 transitions. [2022-07-13 22:22:47,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:47,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1163 transitions. [2022-07-13 22:22:47,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 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 22:22:47,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 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 22:22:47,178 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 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 22:22:47,178 INFO L186 Difference]: Start difference. First operand has 369 places, 1646 transitions, 28995 flow. Second operand 21 states and 1163 transitions. [2022-07-13 22:22:47,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1803 transitions, 35606 flow [2022-07-13 22:22:47,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1803 transitions, 35336 flow, removed 117 selfloop flow, removed 7 redundant places. [2022-07-13 22:22:47,911 INFO L242 Difference]: Finished difference. Result has 390 places, 1745 transitions, 31399 flow [2022-07-13 22:22:47,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=28749, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=31399, PETRI_PLACES=390, PETRI_TRANSITIONS=1745} [2022-07-13 22:22:47,914 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 316 predicate places. [2022-07-13 22:22:47,914 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 1745 transitions, 31399 flow [2022-07-13 22:22:47,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 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 22:22:47,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:47,915 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:22:47,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:48,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 22:22:48,141 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash -240400877, now seen corresponding path program 11 times [2022-07-13 22:22:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:48,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449118909] [2022-07-13 22:22:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:48,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:48,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:48,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449118909] [2022-07-13 22:22:48,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449118909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:48,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137884447] [2022-07-13 22:22:48,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:22:48,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:48,247 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:48,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:22:48,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:22:48,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:48,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:22:48,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:48,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:48,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137884447] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:48,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:48,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-13 22:22:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328802641] [2022-07-13 22:22:48,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:48,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 22:22:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 22:22:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:22:48,674 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:48,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1745 transitions, 31399 flow. Second operand has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 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 22:22:48,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:48,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:48,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:50,843 INFO L129 PetriNetUnfolder]: 1570/4126 cut-off events. [2022-07-13 22:22:50,843 INFO L130 PetriNetUnfolder]: For 82120/82120 co-relation queries the response was YES. [2022-07-13 22:22:50,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34161 conditions, 4126 events. 1570/4126 cut-off events. For 82120/82120 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 36010 event pairs, 20 based on Foata normal form. 17/4142 useless extension candidates. Maximal degree in co-relation 34045. Up to 1423 conditions per place. [2022-07-13 22:22:50,933 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1232 selfloop transitions, 740 changer transitions 25/2038 dead transitions. [2022-07-13 22:22:50,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2038 transitions, 40623 flow [2022-07-13 22:22:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 22:22:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 22:22:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1071 transitions. [2022-07-13 22:22:50,935 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2022-07-13 22:22:50,935 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1071 transitions. [2022-07-13 22:22:50,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1071 transitions. [2022-07-13 22:22:50,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:50,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1071 transitions. [2022-07-13 22:22:50,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 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 22:22:50,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 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 22:22:50,940 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 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 22:22:50,941 INFO L186 Difference]: Start difference. First operand has 390 places, 1745 transitions, 31399 flow. Second operand 19 states and 1071 transitions. [2022-07-13 22:22:50,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2038 transitions, 40623 flow [2022-07-13 22:22:52,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2038 transitions, 40265 flow, removed 161 selfloop flow, removed 7 redundant places. [2022-07-13 22:22:52,447 INFO L242 Difference]: Finished difference. Result has 408 places, 1890 transitions, 36756 flow [2022-07-13 22:22:52,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=31061, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1083, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=36756, PETRI_PLACES=408, PETRI_TRANSITIONS=1890} [2022-07-13 22:22:52,449 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 334 predicate places. [2022-07-13 22:22:52,450 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1890 transitions, 36756 flow [2022-07-13 22:22:52,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 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 22:22:52,450 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:52,450 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:22:52,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:52,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 22:22:52,672 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1349597943, now seen corresponding path program 12 times [2022-07-13 22:22:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:52,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266966822] [2022-07-13 22:22:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:52,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:52,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266966822] [2022-07-13 22:22:52,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266966822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730654247] [2022-07-13 22:22:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:22:52,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:52,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:52,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:52,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:22:52,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:22:52,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:22:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:22:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:52,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:53,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730654247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:53,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:53,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-13 22:22:53,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459816173] [2022-07-13 22:22:53,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:53,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:22:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:22:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:22:53,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:53,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1890 transitions, 36756 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 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 22:22:53,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:53,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:53,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:22:57,179 INFO L129 PetriNetUnfolder]: 1993/5336 cut-off events. [2022-07-13 22:22:57,179 INFO L130 PetriNetUnfolder]: For 146667/146667 co-relation queries the response was YES. [2022-07-13 22:22:57,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48269 conditions, 5336 events. 1993/5336 cut-off events. For 146667/146667 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 47758 event pairs, 22 based on Foata normal form. 27/5361 useless extension candidates. Maximal degree in co-relation 48146. Up to 1287 conditions per place. [2022-07-13 22:22:57,296 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1142 selfloop transitions, 1472 changer transitions 34/2689 dead transitions. [2022-07-13 22:22:57,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2689 transitions, 58358 flow [2022-07-13 22:22:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-13 22:22:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-13 22:22:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3701 transitions. [2022-07-13 22:22:57,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6576048329779673 [2022-07-13 22:22:57,304 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3701 transitions. [2022-07-13 22:22:57,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3701 transitions. [2022-07-13 22:22:57,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:22:57,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3701 transitions. [2022-07-13 22:22:57,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 55.23880597014925) internal successors, (3701), 67 states have internal predecessors, (3701), 0 states have call successors, (0), 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 22:22:57,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 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 22:22:57,322 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 0 states have call successors, (0), 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 22:22:57,322 INFO L186 Difference]: Start difference. First operand has 408 places, 1890 transitions, 36756 flow. Second operand 67 states and 3701 transitions. [2022-07-13 22:22:57,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2689 transitions, 58358 flow [2022-07-13 22:22:59,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2689 transitions, 57773 flow, removed 238 selfloop flow, removed 8 redundant places. [2022-07-13 22:22:59,073 INFO L242 Difference]: Finished difference. Result has 499 places, 2489 transitions, 55032 flow [2022-07-13 22:22:59,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=36429, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=949, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=55032, PETRI_PLACES=499, PETRI_TRANSITIONS=2489} [2022-07-13 22:22:59,075 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 425 predicate places. [2022-07-13 22:22:59,075 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 2489 transitions, 55032 flow [2022-07-13 22:22:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 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 22:22:59,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:22:59,076 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:22:59,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 22:22:59,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:22:59,276 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:22:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:22:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1573275163, now seen corresponding path program 13 times [2022-07-13 22:22:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:22:59,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766346141] [2022-07-13 22:22:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:22:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:22:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:59,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:22:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766346141] [2022-07-13 22:22:59,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766346141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:22:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78843257] [2022-07-13 22:22:59,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:22:59,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:22:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:22:59,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:22:59,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:22:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:22:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:22:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:22:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:59,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:22:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:22:59,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78843257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:22:59,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:22:59,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-07-13 22:22:59,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160998017] [2022-07-13 22:22:59,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:22:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:22:59,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:22:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:22:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:22:59,720 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:22:59,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 2489 transitions, 55032 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 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 22:22:59,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:22:59,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:22:59,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:05,060 INFO L129 PetriNetUnfolder]: 2534/6394 cut-off events. [2022-07-13 22:23:05,060 INFO L130 PetriNetUnfolder]: For 194472/194472 co-relation queries the response was YES. [2022-07-13 22:23:05,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65950 conditions, 6394 events. 2534/6394 cut-off events. For 194472/194472 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 57228 event pairs, 65 based on Foata normal form. 4/6366 useless extension candidates. Maximal degree in co-relation 65795. Up to 2426 conditions per place. [2022-07-13 22:23:05,179 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1730 selfloop transitions, 1611 changer transitions 14/3396 dead transitions. [2022-07-13 22:23:05,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 3396 transitions, 82660 flow [2022-07-13 22:23:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 22:23:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-13 22:23:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2628 transitions. [2022-07-13 22:23:05,182 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2022-07-13 22:23:05,182 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2628 transitions. [2022-07-13 22:23:05,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2628 transitions. [2022-07-13 22:23:05,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:05,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2628 transitions. [2022-07-13 22:23:05,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 54.75) internal successors, (2628), 48 states have internal predecessors, (2628), 0 states have call successors, (0), 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 22:23:05,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 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 22:23:05,190 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 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 22:23:05,190 INFO L186 Difference]: Start difference. First operand has 499 places, 2489 transitions, 55032 flow. Second operand 48 states and 2628 transitions. [2022-07-13 22:23:05,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 3396 transitions, 82660 flow [2022-07-13 22:23:08,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 3396 transitions, 79239 flow, removed 1611 selfloop flow, removed 10 redundant places. [2022-07-13 22:23:08,586 INFO L242 Difference]: Finished difference. Result has 557 places, 3192 transitions, 75273 flow [2022-07-13 22:23:08,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=52267, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=75273, PETRI_PLACES=557, PETRI_TRANSITIONS=3192} [2022-07-13 22:23:08,589 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 483 predicate places. [2022-07-13 22:23:08,590 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 3192 transitions, 75273 flow [2022-07-13 22:23:08,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 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 22:23:08,590 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:08,590 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:08,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 22:23:08,803 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash 242113833, now seen corresponding path program 14 times [2022-07-13 22:23:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:08,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840125313] [2022-07-13 22:23:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:08,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840125313] [2022-07-13 22:23:08,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840125313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395003763] [2022-07-13 22:23:08,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:23:08,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:08,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:08,886 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:08,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:23:08,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:23:08,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:23:08,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:09,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:09,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395003763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:09,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:09,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-13 22:23:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185555899] [2022-07-13 22:23:09,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:23:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:23:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:23:09,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:23:09,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 3192 transitions, 75273 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 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 22:23:09,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:09,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:23:09,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:15,375 INFO L129 PetriNetUnfolder]: 2563/6504 cut-off events. [2022-07-13 22:23:15,375 INFO L130 PetriNetUnfolder]: For 178303/178303 co-relation queries the response was YES. [2022-07-13 22:23:15,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68067 conditions, 6504 events. 2563/6504 cut-off events. For 178303/178303 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 58137 event pairs, 22 based on Foata normal form. 34/6536 useless extension candidates. Maximal degree in co-relation 67894. Up to 2000 conditions per place. [2022-07-13 22:23:15,544 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1563 selfloop transitions, 1781 changer transitions 27/3412 dead transitions. [2022-07-13 22:23:15,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 3412 transitions, 86614 flow [2022-07-13 22:23:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 22:23:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 22:23:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2856 transitions. [2022-07-13 22:23:15,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2022-07-13 22:23:15,547 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2856 transitions. [2022-07-13 22:23:15,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2856 transitions. [2022-07-13 22:23:15,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:15,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2856 transitions. [2022-07-13 22:23:15,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.92307692307692) internal successors, (2856), 52 states have internal predecessors, (2856), 0 states have call successors, (0), 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 22:23:15,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 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 22:23:15,555 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 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 22:23:15,555 INFO L186 Difference]: Start difference. First operand has 557 places, 3192 transitions, 75273 flow. Second operand 52 states and 2856 transitions. [2022-07-13 22:23:15,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 3412 transitions, 86614 flow [2022-07-13 22:23:19,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 3412 transitions, 83438 flow, removed 1472 selfloop flow, removed 13 redundant places. [2022-07-13 22:23:19,632 INFO L242 Difference]: Finished difference. Result has 594 places, 3282 transitions, 80227 flow [2022-07-13 22:23:19,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=71764, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=80227, PETRI_PLACES=594, PETRI_TRANSITIONS=3282} [2022-07-13 22:23:19,635 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 520 predicate places. [2022-07-13 22:23:19,635 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 3282 transitions, 80227 flow [2022-07-13 22:23:19,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 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 22:23:19,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:19,636 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:19,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:19,859 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1203639799, now seen corresponding path program 15 times [2022-07-13 22:23:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:19,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238477613] [2022-07-13 22:23:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:19,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:19,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238477613] [2022-07-13 22:23:19,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238477613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:19,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065344094] [2022-07-13 22:23:19,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:23:19,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:19,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:19,940 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:19,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:23:20,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:23:20,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:20,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:23:20,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:20,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:20,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065344094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:20,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:20,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-07-13 22:23:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436133909] [2022-07-13 22:23:20,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:20,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:23:20,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:23:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:23:20,319 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:23:20,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 3282 transitions, 80227 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 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 22:23:20,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:20,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:23:20,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:28,830 INFO L129 PetriNetUnfolder]: 2977/7605 cut-off events. [2022-07-13 22:23:28,830 INFO L130 PetriNetUnfolder]: For 209622/209622 co-relation queries the response was YES. [2022-07-13 22:23:28,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81027 conditions, 7605 events. 2977/7605 cut-off events. For 209622/209622 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 70857 event pairs, 103 based on Foata normal form. 3/7546 useless extension candidates. Maximal degree in co-relation 80852. Up to 2393 conditions per place. [2022-07-13 22:23:29,080 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1696 selfloop transitions, 2062 changer transitions 6/3805 dead transitions. [2022-07-13 22:23:29,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3805 transitions, 101709 flow [2022-07-13 22:23:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 22:23:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-13 22:23:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1920 transitions. [2022-07-13 22:23:29,082 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2022-07-13 22:23:29,082 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1920 transitions. [2022-07-13 22:23:29,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1920 transitions. [2022-07-13 22:23:29,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:29,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1920 transitions. [2022-07-13 22:23:29,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 54.857142857142854) internal successors, (1920), 35 states have internal predecessors, (1920), 0 states have call successors, (0), 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 22:23:29,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 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 22:23:29,089 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 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 22:23:29,089 INFO L186 Difference]: Start difference. First operand has 594 places, 3282 transitions, 80227 flow. Second operand 35 states and 1920 transitions. [2022-07-13 22:23:29,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3805 transitions, 101709 flow [2022-07-13 22:23:33,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3805 transitions, 98472 flow, removed 167 selfloop flow, removed 25 redundant places. [2022-07-13 22:23:33,326 INFO L242 Difference]: Finished difference. Result has 615 places, 3700 transitions, 96148 flow [2022-07-13 22:23:33,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=77318, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=96148, PETRI_PLACES=615, PETRI_TRANSITIONS=3700} [2022-07-13 22:23:33,330 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 541 predicate places. [2022-07-13 22:23:33,331 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 3700 transitions, 96148 flow [2022-07-13 22:23:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 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 22:23:33,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:33,331 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:33,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:33,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:33,555 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:33,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1905586027, now seen corresponding path program 16 times [2022-07-13 22:23:33,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:33,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190072570] [2022-07-13 22:23:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:33,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:33,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:33,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190072570] [2022-07-13 22:23:33,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190072570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:33,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831144092] [2022-07-13 22:23:33,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:23:33,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:33,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:33,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:33,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:23:33,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:23:33,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:23:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:33,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:33,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831144092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:33,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:33,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-13 22:23:33,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222998458] [2022-07-13 22:23:33,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:33,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 22:23:33,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:33,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 22:23:33,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:23:33,978 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:23:33,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 3700 transitions, 96148 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 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 22:23:33,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:33,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:23:33,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:45,536 INFO L129 PetriNetUnfolder]: 3382/8424 cut-off events. [2022-07-13 22:23:45,536 INFO L130 PetriNetUnfolder]: For 275824/275824 co-relation queries the response was YES. [2022-07-13 22:23:45,662 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95114 conditions, 8424 events. 3382/8424 cut-off events. For 275824/275824 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 78277 event pairs, 100 based on Foata normal form. 3/8367 useless extension candidates. Maximal degree in co-relation 94933. Up to 4271 conditions per place. [2022-07-13 22:23:45,727 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2803 selfloop transitions, 1465 changer transitions 11/4320 dead transitions. [2022-07-13 22:23:45,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 4320 transitions, 121788 flow [2022-07-13 22:23:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 22:23:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-13 22:23:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1596 transitions. [2022-07-13 22:23:45,729 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2022-07-13 22:23:45,729 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1596 transitions. [2022-07-13 22:23:45,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1596 transitions. [2022-07-13 22:23:45,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:45,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1596 transitions. [2022-07-13 22:23:45,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.03448275862069) internal successors, (1596), 29 states have internal predecessors, (1596), 0 states have call successors, (0), 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 22:23:45,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 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 22:23:45,734 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 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 22:23:45,734 INFO L186 Difference]: Start difference. First operand has 615 places, 3700 transitions, 96148 flow. Second operand 29 states and 1596 transitions. [2022-07-13 22:23:45,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 4320 transitions, 121788 flow [2022-07-13 22:23:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 4320 transitions, 116605 flow, removed 1013 selfloop flow, removed 14 redundant places. [2022-07-13 22:23:51,654 INFO L242 Difference]: Finished difference. Result has 642 places, 4151 transitions, 110672 flow [2022-07-13 22:23:51,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92197, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=110672, PETRI_PLACES=642, PETRI_TRANSITIONS=4151} [2022-07-13 22:23:51,658 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 568 predicate places. [2022-07-13 22:23:51,658 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 4151 transitions, 110672 flow [2022-07-13 22:23:51,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 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 22:23:51,658 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:51,658 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:51,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-13 22:23:51,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:51,859 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash -723433217, now seen corresponding path program 17 times [2022-07-13 22:23:51,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:51,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823367408] [2022-07-13 22:23:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:51,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823367408] [2022-07-13 22:23:51,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823367408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:51,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103856070] [2022-07-13 22:23:51,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:23:51,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:51,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:51,936 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:51,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:23:51,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 22:23:51,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 22:23:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:52,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:52,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103856070] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:52,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:52,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 28 [2022-07-13 22:23:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987296934] [2022-07-13 22:23:52,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 22:23:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 22:23:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-07-13 22:23:52,427 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:23:52,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 4151 transitions, 110672 flow. Second operand has 28 states, 28 states have (on average 53.464285714285715) internal successors, (1497), 28 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:23:52,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:52,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:23:52,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:06,335 INFO L129 PetriNetUnfolder]: 3505/8631 cut-off events. [2022-07-13 22:24:06,335 INFO L130 PetriNetUnfolder]: For 285467/285467 co-relation queries the response was YES. [2022-07-13 22:24:06,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99687 conditions, 8631 events. 3505/8631 cut-off events. For 285467/285467 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 79835 event pairs, 2 based on Foata normal form. 92/8722 useless extension candidates. Maximal degree in co-relation 99496. Up to 1639 conditions per place. [2022-07-13 22:24:06,525 INFO L132 encePairwiseOnDemand]: 64/84 looper letters, 167 selfloop transitions, 4433 changer transitions 260/4901 dead transitions. [2022-07-13 22:24:06,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 4901 transitions, 140893 flow [2022-07-13 22:24:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-13 22:24:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-13 22:24:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3513 transitions. [2022-07-13 22:24:06,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6434065934065935 [2022-07-13 22:24:06,529 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3513 transitions. [2022-07-13 22:24:06,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3513 transitions. [2022-07-13 22:24:06,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:06,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3513 transitions. [2022-07-13 22:24:06,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.04615384615385) internal successors, (3513), 65 states have internal predecessors, (3513), 0 states have call successors, (0), 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 22:24:06,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 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 22:24:06,540 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 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 22:24:06,540 INFO L186 Difference]: Start difference. First operand has 642 places, 4151 transitions, 110672 flow. Second operand 65 states and 3513 transitions. [2022-07-13 22:24:06,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 4901 transitions, 140893 flow [2022-07-13 22:24:12,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 4901 transitions, 140341 flow, removed 133 selfloop flow, removed 15 redundant places. [2022-07-13 22:24:12,917 INFO L242 Difference]: Finished difference. Result has 710 places, 4566 transitions, 135855 flow [2022-07-13 22:24:12,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=109501, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3856, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=135855, PETRI_PLACES=710, PETRI_TRANSITIONS=4566} [2022-07-13 22:24:12,921 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 636 predicate places. [2022-07-13 22:24:12,921 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 4566 transitions, 135855 flow [2022-07-13 22:24:12,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.464285714285715) internal successors, (1497), 28 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:24:12,921 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:12,921 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:12,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-13 22:24:13,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 22:24:13,122 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:13,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1126888515, now seen corresponding path program 18 times [2022-07-13 22:24:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025986312] [2022-07-13 22:24:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:13,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:13,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025986312] [2022-07-13 22:24:13,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025986312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768670202] [2022-07-13 22:24:13,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:24:13,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:13,219 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:13,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 22:24:13,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:24:13,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:24:13,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:24:13,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:13,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:13,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768670202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:13,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:13,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-13 22:24:13,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491962077] [2022-07-13 22:24:13,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:13,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:24:13,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:24:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:24:13,669 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:24:13,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 4566 transitions, 135855 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 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 22:24:13,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:13,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:24:13,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:24:29,360 INFO L129 PetriNetUnfolder]: 3657/8295 cut-off events. [2022-07-13 22:24:29,360 INFO L130 PetriNetUnfolder]: For 334985/334985 co-relation queries the response was YES. [2022-07-13 22:24:29,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113541 conditions, 8295 events. 3657/8295 cut-off events. For 334985/334985 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72806 event pairs, 54 based on Foata normal form. 30/8281 useless extension candidates. Maximal degree in co-relation 113329. Up to 3768 conditions per place. [2022-07-13 22:24:29,574 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3522 selfloop transitions, 1563 changer transitions 4/5130 dead transitions. [2022-07-13 22:24:29,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 5130 transitions, 164211 flow [2022-07-13 22:24:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-13 22:24:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-13 22:24:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2679 transitions. [2022-07-13 22:24:29,577 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6508746355685131 [2022-07-13 22:24:29,577 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2679 transitions. [2022-07-13 22:24:29,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2679 transitions. [2022-07-13 22:24:29,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:24:29,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2679 transitions. [2022-07-13 22:24:29,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.673469387755105) internal successors, (2679), 49 states have internal predecessors, (2679), 0 states have call successors, (0), 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 22:24:29,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 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 22:24:29,586 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 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 22:24:29,586 INFO L186 Difference]: Start difference. First operand has 710 places, 4566 transitions, 135855 flow. Second operand 49 states and 2679 transitions. [2022-07-13 22:24:29,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 5130 transitions, 164211 flow [2022-07-13 22:24:38,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 5130 transitions, 153577 flow, removed 2314 selfloop flow, removed 37 redundant places. [2022-07-13 22:24:38,369 INFO L242 Difference]: Finished difference. Result has 705 places, 5008 transitions, 145047 flow [2022-07-13 22:24:38,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=127154, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=145047, PETRI_PLACES=705, PETRI_TRANSITIONS=5008} [2022-07-13 22:24:38,373 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 631 predicate places. [2022-07-13 22:24:38,373 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 5008 transitions, 145047 flow [2022-07-13 22:24:38,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 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 22:24:38,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:24:38,374 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:24:38,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 22:24:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:38,575 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:24:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:24:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -66159831, now seen corresponding path program 19 times [2022-07-13 22:24:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:24:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620949815] [2022-07-13 22:24:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:24:38,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:24:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:24:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620949815] [2022-07-13 22:24:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620949815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:24:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949926331] [2022-07-13 22:24:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:24:38,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:24:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:24:38,660 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:24:38,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 22:24:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:24:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:24:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:24:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:38,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:24:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:24:39,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949926331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:24:39,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:24:39,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-07-13 22:24:39,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832607301] [2022-07-13 22:24:39,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:24:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 22:24:39,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:24:39,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 22:24:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-07-13 22:24:39,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:24:39,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 5008 transitions, 145047 flow. Second operand has 25 states, 25 states have (on average 53.24) internal successors, (1331), 25 states have internal predecessors, (1331), 0 states have call successors, (0), 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 22:24:39,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:24:39,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:24:39,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:00,444 INFO L129 PetriNetUnfolder]: 3891/8904 cut-off events. [2022-07-13 22:25:00,444 INFO L130 PetriNetUnfolder]: For 324690/324690 co-relation queries the response was YES. [2022-07-13 22:25:00,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117008 conditions, 8904 events. 3891/8904 cut-off events. For 324690/324690 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 79576 event pairs, 22 based on Foata normal form. 4/8894 useless extension candidates. Maximal degree in co-relation 116803. Up to 3289 conditions per place. [2022-07-13 22:25:00,674 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3196 selfloop transitions, 2182 changer transitions 12/5431 dead transitions. [2022-07-13 22:25:00,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 5431 transitions, 168218 flow [2022-07-13 22:25:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 22:25:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-13 22:25:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2523 transitions. [2022-07-13 22:25:00,678 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6529503105590062 [2022-07-13 22:25:00,678 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2523 transitions. [2022-07-13 22:25:00,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2523 transitions. [2022-07-13 22:25:00,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:00,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2523 transitions. [2022-07-13 22:25:00,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.84782608695652) internal successors, (2523), 46 states have internal predecessors, (2523), 0 states have call successors, (0), 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 22:25:00,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 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 22:25:00,685 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 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 22:25:00,685 INFO L186 Difference]: Start difference. First operand has 705 places, 5008 transitions, 145047 flow. Second operand 46 states and 2523 transitions. [2022-07-13 22:25:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 5431 transitions, 168218 flow [2022-07-13 22:25:09,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 5431 transitions, 166364 flow, removed 908 selfloop flow, removed 7 redundant places. [2022-07-13 22:25:09,718 INFO L242 Difference]: Finished difference. Result has 768 places, 5360 transitions, 162919 flow [2022-07-13 22:25:09,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=143223, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1887, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=162919, PETRI_PLACES=768, PETRI_TRANSITIONS=5360} [2022-07-13 22:25:09,722 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 694 predicate places. [2022-07-13 22:25:09,722 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 5360 transitions, 162919 flow [2022-07-13 22:25:09,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.24) internal successors, (1331), 25 states have internal predecessors, (1331), 0 states have call successors, (0), 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 22:25:09,723 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:09,723 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:25:09,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 22:25:09,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:09,923 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:09,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1602266621, now seen corresponding path program 20 times [2022-07-13 22:25:09,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:09,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453682399] [2022-07-13 22:25:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:09,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:10,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453682399] [2022-07-13 22:25:10,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453682399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575471329] [2022-07-13 22:25:10,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:25:10,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:10,016 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:25:10,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 22:25:10,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:25:10,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:25:10,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:25:10,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:10,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:25:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:10,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575471329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:10,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:10,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-13 22:25:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287261148] [2022-07-13 22:25:10,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 22:25:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 22:25:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-07-13 22:25:10,345 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:25:10,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 5360 transitions, 162919 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 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 22:25:10,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:10,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:25:10,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:33,801 INFO L129 PetriNetUnfolder]: 4020/9124 cut-off events. [2022-07-13 22:25:33,801 INFO L130 PetriNetUnfolder]: For 393200/393200 co-relation queries the response was YES. [2022-07-13 22:25:33,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125989 conditions, 9124 events. 4020/9124 cut-off events. For 393200/393200 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 81078 event pairs, 56 based on Foata normal form. 19/9097 useless extension candidates. Maximal degree in co-relation 125759. Up to 4233 conditions per place. [2022-07-13 22:25:34,063 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4009 selfloop transitions, 1607 changer transitions 0/5657 dead transitions. [2022-07-13 22:25:34,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 5657 transitions, 182757 flow [2022-07-13 22:25:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-13 22:25:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-13 22:25:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2343 transitions. [2022-07-13 22:25:34,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6486710963455149 [2022-07-13 22:25:34,066 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2343 transitions. [2022-07-13 22:25:34,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2343 transitions. [2022-07-13 22:25:34,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:34,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2343 transitions. [2022-07-13 22:25:34,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 54.48837209302326) internal successors, (2343), 43 states have internal predecessors, (2343), 0 states have call successors, (0), 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 22:25:34,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 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 22:25:34,073 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 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 22:25:34,073 INFO L186 Difference]: Start difference. First operand has 768 places, 5360 transitions, 162919 flow. Second operand 43 states and 2343 transitions. [2022-07-13 22:25:34,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 5657 transitions, 182757 flow [2022-07-13 22:25:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 5657 transitions, 180544 flow, removed 1021 selfloop flow, removed 9 redundant places. [2022-07-13 22:25:44,898 INFO L242 Difference]: Finished difference. Result has 817 places, 5530 transitions, 171656 flow [2022-07-13 22:25:44,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160674, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=171656, PETRI_PLACES=817, PETRI_TRANSITIONS=5530} [2022-07-13 22:25:44,904 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 743 predicate places. [2022-07-13 22:25:44,904 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 5530 transitions, 171656 flow [2022-07-13 22:25:44,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 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 22:25:44,905 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:44,905 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:25:44,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 22:25:45,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:45,128 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 72955617, now seen corresponding path program 21 times [2022-07-13 22:25:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:45,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162747703] [2022-07-13 22:25:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:45,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:45,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:45,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162747703] [2022-07-13 22:25:45,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162747703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681656368] [2022-07-13 22:25:45,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:25:45,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:45,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:45,242 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:25:45,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 22:25:45,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:25:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:25:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:25:45,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:45,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:25:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:25:45,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681656368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:45,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:45,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-13 22:25:45,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712185520] [2022-07-13 22:25:45,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:45,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 22:25:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:45,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 22:25:45,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-07-13 22:25:45,660 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:25:45,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 5530 transitions, 171656 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 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 22:25:45,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:45,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:25:45,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:26:17,364 INFO L129 PetriNetUnfolder]: 4862/11036 cut-off events. [2022-07-13 22:26:17,364 INFO L130 PetriNetUnfolder]: For 498714/498714 co-relation queries the response was YES. [2022-07-13 22:26:17,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156070 conditions, 11036 events. 4862/11036 cut-off events. For 498714/498714 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 101076 event pairs, 22 based on Foata normal form. 4/11025 useless extension candidates. Maximal degree in co-relation 155826. Up to 2899 conditions per place. [2022-07-13 22:26:17,717 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3200 selfloop transitions, 3744 changer transitions 11/6996 dead transitions. [2022-07-13 22:26:17,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 6996 transitions, 231807 flow [2022-07-13 22:26:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 22:26:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-13 22:26:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2022-07-13 22:26:17,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2022-07-13 22:26:17,720 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2022-07-13 22:26:17,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2022-07-13 22:26:17,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:26:17,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2022-07-13 22:26:17,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.5) internal successors, (1887), 34 states have internal predecessors, (1887), 0 states have call successors, (0), 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 22:26:17,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 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 22:26:17,724 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 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 22:26:17,724 INFO L186 Difference]: Start difference. First operand has 817 places, 5530 transitions, 171656 flow. Second operand 34 states and 1887 transitions. [2022-07-13 22:26:17,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 6996 transitions, 231807 flow [2022-07-13 22:26:32,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 6996 transitions, 231565 flow, removed 71 selfloop flow, removed 12 redundant places. [2022-07-13 22:26:32,278 INFO L242 Difference]: Finished difference. Result has 853 places, 6586 transitions, 222391 flow [2022-07-13 22:26:32,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=171418, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=222391, PETRI_PLACES=853, PETRI_TRANSITIONS=6586} [2022-07-13 22:26:32,284 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 779 predicate places. [2022-07-13 22:26:32,284 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 6586 transitions, 222391 flow [2022-07-13 22:26:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 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 22:26:32,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:26:32,285 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:26:32,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 22:26:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 22:26:32,499 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:26:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:26:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 816924545, now seen corresponding path program 22 times [2022-07-13 22:26:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:26:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356254415] [2022-07-13 22:26:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:26:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:26:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:26:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:26:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356254415] [2022-07-13 22:26:32,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356254415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:26:32,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101072615] [2022-07-13 22:26:32,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:26:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:26:32,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:26:32,592 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:26:32,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 22:26:32,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:26:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:26:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:26:32,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:26:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:32,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:26:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:26:32,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101072615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:26:32,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:26:32,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-13 22:26:32,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819767016] [2022-07-13 22:26:32,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:26:32,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 22:26:32,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:26:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 22:26:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-13 22:26:32,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-07-13 22:26:32,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 6586 transitions, 222391 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 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 22:26:32,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:26:32,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-07-13 22:26:32,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand