./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/security.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/security.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 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:08:53,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:08:53,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:08:53,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:08:53,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:08:53,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:08:53,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:08:53,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:08:53,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:08:53,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:08:53,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:08:53,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:08:53,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:08:53,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:08:53,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:08:53,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:08:53,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:08:53,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:08:53,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:08:53,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:08:53,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:08:53,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:08:53,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:08:53,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:08:53,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:08:53,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:08:53,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:08:53,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:08:53,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:08:53,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:08:53,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:08:53,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:08:53,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:08:53,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:08:53,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:08:53,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:08:53,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:08:53,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:08:53,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:08:53,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:08:53,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:08:53,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:08:53,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:08:53,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:08:53,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:08:53,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:08:53,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:08:53,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:08:53,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:08:53,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:08:53,643 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:08:53,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:08:53,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:08:53,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:08:53,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:08:53,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:08:53,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:08:53,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:08:53,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:08:53,646 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:08:53,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:08:53,646 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:08:53,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:08:53,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:08:53,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:08:53,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:08:53,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:08:53,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:08:53,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:08:53,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:08:53,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:08:53,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:08:53,649 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:08:53,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:08:53,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:08:53,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2021-12-28 03:08:53,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:08:53,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:08:53,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:08:53,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:08:53,955 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:08:53,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/security.wvr.c [2021-12-28 03:08:54,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b76d1fb44/fb18ff3f882b4b3381f15ee741402070/FLAGfeba6a547 [2021-12-28 03:08:54,343 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:08:54,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/security.wvr.c [2021-12-28 03:08:54,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b76d1fb44/fb18ff3f882b4b3381f15ee741402070/FLAGfeba6a547 [2021-12-28 03:08:54,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b76d1fb44/fb18ff3f882b4b3381f15ee741402070 [2021-12-28 03:08:54,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:08:54,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:08:54,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:08:54,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:08:54,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:08:54,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df0d47e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54, skipping insertion in model container [2021-12-28 03:08:54,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:08:54,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:08:54,524 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/security.wvr.c[1931,1944] [2021-12-28 03:08:54,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:08:54,531 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:08:54,550 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/security.wvr.c[1931,1944] [2021-12-28 03:08:54,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:08:54,592 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:08:54,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54 WrapperNode [2021-12-28 03:08:54,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:08:54,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:08:54,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:08:54,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:08:54,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,619 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-12-28 03:08:54,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:08:54,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:08:54,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:08:54,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:08:54,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:08:54,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:08:54,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:08:54,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:08:54,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (1/1) ... [2021-12-28 03:08:54,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:08:54,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:08:54,683 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) [2021-12-28 03:08:54,710 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 [2021-12-28 03:08:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:08:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:08:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:08:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:08:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:08:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:08:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:08:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:08:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:08:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:08:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:08:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:08:54,725 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 03:08:54,807 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:08:54,809 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:08:54,924 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:08:54,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:08:54,931 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 03:08:54,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:08:54 BoogieIcfgContainer [2021-12-28 03:08:54,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:08:54,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:08:54,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:08:54,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:08:54,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:08:54" (1/3) ... [2021-12-28 03:08:54,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76958c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:08:54, skipping insertion in model container [2021-12-28 03:08:54,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:08:54" (2/3) ... [2021-12-28 03:08:54,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76958c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:08:54, skipping insertion in model container [2021-12-28 03:08:54,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:08:54" (3/3) ... [2021-12-28 03:08:54,938 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2021-12-28 03:08:54,941 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:08:54,941 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:08:54,941 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:08:54,942 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:08:54,971 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,976 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,976 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,978 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,978 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,978 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,989 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,989 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:08:54,998 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 03:08:55,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:08:55,041 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:08:55,042 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 03:08:55,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 178 flow [2021-12-28 03:08:55,108 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2021-12-28 03:08:55,108 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:08:55,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 3/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-12-28 03:08:55,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 178 flow [2021-12-28 03:08:55,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 70 transitions, 152 flow [2021-12-28 03:08:55,138 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2021-12-28 03:08:55,139 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:08:55,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:55,140 INFO L254 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] [2021-12-28 03:08:55,140 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:55,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1803071327, now seen corresponding path program 1 times [2021-12-28 03:08:55,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:55,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74467016] [2021-12-28 03:08:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:55,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:55,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:55,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74467016] [2021-12-28 03:08:55,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74467016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:55,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:55,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:55,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075171448] [2021-12-28 03:08:55,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:55,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:55,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:55,663 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:55,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:55,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:55,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:55,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:56,003 INFO L129 PetriNetUnfolder]: 32/219 cut-off events. [2021-12-28 03:08:56,003 INFO L130 PetriNetUnfolder]: For 57/60 co-relation queries the response was YES. [2021-12-28 03:08:56,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 219 events. 32/219 cut-off events. For 57/60 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 894 event pairs, 11 based on Foata normal form. 5/212 useless extension candidates. Maximal degree in co-relation 170. Up to 47 conditions per place. [2021-12-28 03:08:56,021 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 34 selfloop transitions, 2 changer transitions 24/106 dead transitions. [2021-12-28 03:08:56,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 377 flow [2021-12-28 03:08:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 03:08:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-28 03:08:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 906 transitions. [2021-12-28 03:08:56,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.745679012345679 [2021-12-28 03:08:56,033 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 906 transitions. [2021-12-28 03:08:56,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 906 transitions. [2021-12-28 03:08:56,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:56,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 906 transitions. [2021-12-28 03:08:56,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.4) internal successors, (906), 15 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,052 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,053 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 152 flow. Second operand 15 states and 906 transitions. [2021-12-28 03:08:56,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 377 flow [2021-12-28 03:08:56,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 347 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:08:56,064 INFO L242 Difference]: Finished difference. Result has 95 places, 69 transitions, 175 flow [2021-12-28 03:08:56,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2021-12-28 03:08:56,068 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2021-12-28 03:08:56,069 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 175 flow [2021-12-28 03:08:56,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:56,070 INFO L254 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] [2021-12-28 03:08:56,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:08:56,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1262948190, now seen corresponding path program 1 times [2021-12-28 03:08:56,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354144814] [2021-12-28 03:08:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:56,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:56,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:56,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354144814] [2021-12-28 03:08:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354144814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:56,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:56,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:08:56,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292895666] [2021-12-28 03:08:56,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:56,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:08:56,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:08:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:08:56,249 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-28 03:08:56,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:56,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-28 03:08:56,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:56,411 INFO L129 PetriNetUnfolder]: 21/184 cut-off events. [2021-12-28 03:08:56,412 INFO L130 PetriNetUnfolder]: For 99/103 co-relation queries the response was YES. [2021-12-28 03:08:56,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 184 events. 21/184 cut-off events. For 99/103 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 647 event pairs, 8 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 336. Up to 39 conditions per place. [2021-12-28 03:08:56,413 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 37 selfloop transitions, 3 changer transitions 6/94 dead transitions. [2021-12-28 03:08:56,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 379 flow [2021-12-28 03:08:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:08:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-28 03:08:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 511 transitions. [2021-12-28 03:08:56,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7885802469135802 [2021-12-28 03:08:56,414 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 511 transitions. [2021-12-28 03:08:56,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 511 transitions. [2021-12-28 03:08:56,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:56,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 511 transitions. [2021-12-28 03:08:56,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.875) internal successors, (511), 8 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,417 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,417 INFO L186 Difference]: Start difference. First operand has 95 places, 69 transitions, 175 flow. Second operand 8 states and 511 transitions. [2021-12-28 03:08:56,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 379 flow [2021-12-28 03:08:56,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 314 flow, removed 32 selfloop flow, removed 10 redundant places. [2021-12-28 03:08:56,420 INFO L242 Difference]: Finished difference. Result has 86 places, 71 transitions, 183 flow [2021-12-28 03:08:56,420 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2021-12-28 03:08:56,421 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2021-12-28 03:08:56,421 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 183 flow [2021-12-28 03:08:56,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:56,421 INFO L254 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] [2021-12-28 03:08:56,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:08:56,422 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1033469356, now seen corresponding path program 2 times [2021-12-28 03:08:56,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:56,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237357097] [2021-12-28 03:08:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:56,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:56,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237357097] [2021-12-28 03:08:56,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237357097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:56,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:56,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:08:56,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023708953] [2021-12-28 03:08:56,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:56,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:08:56,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:56,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:08:56,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:08:56,574 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-28 03:08:56,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 183 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:56,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-28 03:08:56,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:56,745 INFO L129 PetriNetUnfolder]: 25/241 cut-off events. [2021-12-28 03:08:56,746 INFO L130 PetriNetUnfolder]: For 111/115 co-relation queries the response was YES. [2021-12-28 03:08:56,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 241 events. 25/241 cut-off events. For 111/115 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1129 event pairs, 16 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 427. Up to 61 conditions per place. [2021-12-28 03:08:56,747 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 34 selfloop transitions, 4 changer transitions 7/93 dead transitions. [2021-12-28 03:08:56,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 366 flow [2021-12-28 03:08:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:08:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-28 03:08:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 505 transitions. [2021-12-28 03:08:56,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2021-12-28 03:08:56,749 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 505 transitions. [2021-12-28 03:08:56,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 505 transitions. [2021-12-28 03:08:56,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:56,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 505 transitions. [2021-12-28 03:08:56,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,752 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,753 INFO L186 Difference]: Start difference. First operand has 86 places, 71 transitions, 183 flow. Second operand 8 states and 505 transitions. [2021-12-28 03:08:56,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 366 flow [2021-12-28 03:08:56,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 347 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-12-28 03:08:56,756 INFO L242 Difference]: Finished difference. Result has 92 places, 72 transitions, 206 flow [2021-12-28 03:08:56,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2021-12-28 03:08:56,757 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2021-12-28 03:08:56,757 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 206 flow [2021-12-28 03:08:56,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:56,758 INFO L254 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] [2021-12-28 03:08:56,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:08:56,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:56,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1244957747, now seen corresponding path program 2 times [2021-12-28 03:08:56,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:56,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503289963] [2021-12-28 03:08:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:56,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:56,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503289963] [2021-12-28 03:08:56,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503289963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:56,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:56,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:56,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461005761] [2021-12-28 03:08:56,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:56,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:56,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:56,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:56,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 206 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:56,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:56,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:56,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:57,059 INFO L129 PetriNetUnfolder]: 28/290 cut-off events. [2021-12-28 03:08:57,060 INFO L130 PetriNetUnfolder]: For 250/251 co-relation queries the response was YES. [2021-12-28 03:08:57,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 290 events. 28/290 cut-off events. For 250/251 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1530 event pairs, 5 based on Foata normal form. 2/280 useless extension candidates. Maximal degree in co-relation 563. Up to 65 conditions per place. [2021-12-28 03:08:57,061 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 38 selfloop transitions, 6 changer transitions 8/98 dead transitions. [2021-12-28 03:08:57,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 438 flow [2021-12-28 03:08:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2021-12-28 03:08:57,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-28 03:08:57,063 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2021-12-28 03:08:57,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2021-12-28 03:08:57,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:57,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2021-12-28 03:08:57,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,066 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,066 INFO L186 Difference]: Start difference. First operand has 92 places, 72 transitions, 206 flow. Second operand 9 states and 549 transitions. [2021-12-28 03:08:57,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 438 flow [2021-12-28 03:08:57,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 98 transitions, 406 flow, removed 15 selfloop flow, removed 5 redundant places. [2021-12-28 03:08:57,069 INFO L242 Difference]: Finished difference. Result has 97 places, 74 transitions, 243 flow [2021-12-28 03:08:57,070 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=243, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2021-12-28 03:08:57,070 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2021-12-28 03:08:57,070 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 243 flow [2021-12-28 03:08:57,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,071 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:57,071 INFO L254 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] [2021-12-28 03:08:57,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:08:57,071 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1661894565, now seen corresponding path program 3 times [2021-12-28 03:08:57,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705432772] [2021-12-28 03:08:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:57,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:57,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705432772] [2021-12-28 03:08:57,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705432772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:57,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:57,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:57,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85936287] [2021-12-28 03:08:57,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:57,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:57,227 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:57,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 243 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:57,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:57,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:57,370 INFO L129 PetriNetUnfolder]: 30/343 cut-off events. [2021-12-28 03:08:57,370 INFO L130 PetriNetUnfolder]: For 415/416 co-relation queries the response was YES. [2021-12-28 03:08:57,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 343 events. 30/343 cut-off events. For 415/416 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2027 event pairs, 23 based on Foata normal form. 2/332 useless extension candidates. Maximal degree in co-relation 704. Up to 62 conditions per place. [2021-12-28 03:08:57,373 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 47 selfloop transitions, 4 changer transitions 9/106 dead transitions. [2021-12-28 03:08:57,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 106 transitions, 523 flow [2021-12-28 03:08:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 558 transitions. [2021-12-28 03:08:57,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7654320987654321 [2021-12-28 03:08:57,375 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 558 transitions. [2021-12-28 03:08:57,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 558 transitions. [2021-12-28 03:08:57,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:57,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 558 transitions. [2021-12-28 03:08:57,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.0) internal successors, (558), 9 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,378 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,378 INFO L186 Difference]: Start difference. First operand has 97 places, 74 transitions, 243 flow. Second operand 9 states and 558 transitions. [2021-12-28 03:08:57,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 106 transitions, 523 flow [2021-12-28 03:08:57,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 106 transitions, 488 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-12-28 03:08:57,383 INFO L242 Difference]: Finished difference. Result has 104 places, 76 transitions, 272 flow [2021-12-28 03:08:57,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=272, PETRI_PLACES=104, PETRI_TRANSITIONS=76} [2021-12-28 03:08:57,386 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2021-12-28 03:08:57,386 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 76 transitions, 272 flow [2021-12-28 03:08:57,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:57,387 INFO L254 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] [2021-12-28 03:08:57,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:08:57,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash 407443089, now seen corresponding path program 4 times [2021-12-28 03:08:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:57,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015157400] [2021-12-28 03:08:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:57,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:57,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:57,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015157400] [2021-12-28 03:08:57,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015157400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:57,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:57,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:57,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331722617] [2021-12-28 03:08:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:57,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:57,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:57,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:57,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:57,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 76 transitions, 272 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:57,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:57,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:57,668 INFO L129 PetriNetUnfolder]: 27/352 cut-off events. [2021-12-28 03:08:57,668 INFO L130 PetriNetUnfolder]: For 511/513 co-relation queries the response was YES. [2021-12-28 03:08:57,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 352 events. 27/352 cut-off events. For 511/513 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2126 event pairs, 7 based on Foata normal form. 2/343 useless extension candidates. Maximal degree in co-relation 754. Up to 73 conditions per place. [2021-12-28 03:08:57,670 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 51 selfloop transitions, 6 changer transitions 10/113 dead transitions. [2021-12-28 03:08:57,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 113 transitions, 600 flow [2021-12-28 03:08:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 561 transitions. [2021-12-28 03:08:57,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7695473251028807 [2021-12-28 03:08:57,672 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 561 transitions. [2021-12-28 03:08:57,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 561 transitions. [2021-12-28 03:08:57,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:57,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 561 transitions. [2021-12-28 03:08:57,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.333333333333336) internal successors, (561), 9 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,676 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,676 INFO L186 Difference]: Start difference. First operand has 104 places, 76 transitions, 272 flow. Second operand 9 states and 561 transitions. [2021-12-28 03:08:57,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 113 transitions, 600 flow [2021-12-28 03:08:57,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 113 transitions, 559 flow, removed 19 selfloop flow, removed 5 redundant places. [2021-12-28 03:08:57,680 INFO L242 Difference]: Finished difference. Result has 110 places, 79 transitions, 330 flow [2021-12-28 03:08:57,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=110, PETRI_TRANSITIONS=79} [2021-12-28 03:08:57,681 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2021-12-28 03:08:57,682 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 79 transitions, 330 flow [2021-12-28 03:08:57,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:57,682 INFO L254 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] [2021-12-28 03:08:57,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:08:57,683 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:57,683 INFO L85 PathProgramCache]: Analyzing trace with hash 741952778, now seen corresponding path program 3 times [2021-12-28 03:08:57,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:57,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137711489] [2021-12-28 03:08:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:57,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:57,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137711489] [2021-12-28 03:08:57,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137711489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:57,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:57,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:08:57,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023938903] [2021-12-28 03:08:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:57,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:08:57,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:57,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:08:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:08:57,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-28 03:08:57,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 79 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:57,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-28 03:08:57,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:57,920 INFO L129 PetriNetUnfolder]: 22/306 cut-off events. [2021-12-28 03:08:57,920 INFO L130 PetriNetUnfolder]: For 582/589 co-relation queries the response was YES. [2021-12-28 03:08:57,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 306 events. 22/306 cut-off events. For 582/589 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1676 event pairs, 19 based on Foata normal form. 1/298 useless extension candidates. Maximal degree in co-relation 675. Up to 70 conditions per place. [2021-12-28 03:08:57,922 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 35 selfloop transitions, 3 changer transitions 10/97 dead transitions. [2021-12-28 03:08:57,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 97 transitions, 518 flow [2021-12-28 03:08:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:08:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-28 03:08:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 505 transitions. [2021-12-28 03:08:57,924 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2021-12-28 03:08:57,924 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 505 transitions. [2021-12-28 03:08:57,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 505 transitions. [2021-12-28 03:08:57,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:57,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 505 transitions. [2021-12-28 03:08:57,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,927 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,927 INFO L186 Difference]: Start difference. First operand has 110 places, 79 transitions, 330 flow. Second operand 8 states and 505 transitions. [2021-12-28 03:08:57,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 97 transitions, 518 flow [2021-12-28 03:08:57,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 97 transitions, 488 flow, removed 14 selfloop flow, removed 4 redundant places. [2021-12-28 03:08:57,931 INFO L242 Difference]: Finished difference. Result has 114 places, 77 transitions, 302 flow [2021-12-28 03:08:57,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2021-12-28 03:08:57,932 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2021-12-28 03:08:57,932 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 302 flow [2021-12-28 03:08:57,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:57,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:57,934 INFO L254 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] [2021-12-28 03:08:57,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:08:57,934 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash -848346999, now seen corresponding path program 5 times [2021-12-28 03:08:57,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:57,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608632641] [2021-12-28 03:08:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:57,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:58,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:58,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608632641] [2021-12-28 03:08:58,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608632641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:58,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:58,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:58,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055221055] [2021-12-28 03:08:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:58,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:58,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:58,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:58,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 77 transitions, 302 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:58,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:58,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:58,226 INFO L129 PetriNetUnfolder]: 23/301 cut-off events. [2021-12-28 03:08:58,226 INFO L130 PetriNetUnfolder]: For 481/482 co-relation queries the response was YES. [2021-12-28 03:08:58,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 301 events. 23/301 cut-off events. For 481/482 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1659 event pairs, 19 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 657. Up to 62 conditions per place. [2021-12-28 03:08:58,228 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 42 selfloop transitions, 6 changer transitions 8/102 dead transitions. [2021-12-28 03:08:58,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 102 transitions, 532 flow [2021-12-28 03:08:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 555 transitions. [2021-12-28 03:08:58,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7613168724279835 [2021-12-28 03:08:58,229 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 555 transitions. [2021-12-28 03:08:58,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 555 transitions. [2021-12-28 03:08:58,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:58,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 555 transitions. [2021-12-28 03:08:58,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.666666666666664) internal successors, (555), 9 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,232 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,232 INFO L186 Difference]: Start difference. First operand has 114 places, 77 transitions, 302 flow. Second operand 9 states and 555 transitions. [2021-12-28 03:08:58,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 102 transitions, 532 flow [2021-12-28 03:08:58,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 493 flow, removed 18 selfloop flow, removed 7 redundant places. [2021-12-28 03:08:58,235 INFO L242 Difference]: Finished difference. Result has 113 places, 78 transitions, 318 flow [2021-12-28 03:08:58,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=318, PETRI_PLACES=113, PETRI_TRANSITIONS=78} [2021-12-28 03:08:58,237 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2021-12-28 03:08:58,237 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 318 flow [2021-12-28 03:08:58,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:58,238 INFO L254 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] [2021-12-28 03:08:58,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:08:58,238 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash -252513187, now seen corresponding path program 6 times [2021-12-28 03:08:58,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:58,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394096678] [2021-12-28 03:08:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:58,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:58,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:58,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394096678] [2021-12-28 03:08:58,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394096678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:58,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:58,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:58,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109682963] [2021-12-28 03:08:58,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:58,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:58,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:58,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:58,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:58,355 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:58,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 318 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:58,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:58,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:58,486 INFO L129 PetriNetUnfolder]: 22/282 cut-off events. [2021-12-28 03:08:58,486 INFO L130 PetriNetUnfolder]: For 489/491 co-relation queries the response was YES. [2021-12-28 03:08:58,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 282 events. 22/282 cut-off events. For 489/491 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1501 event pairs, 20 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 630. Up to 62 conditions per place. [2021-12-28 03:08:58,488 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 34 selfloop transitions, 2 changer transitions 13/95 dead transitions. [2021-12-28 03:08:58,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 95 transitions, 499 flow [2021-12-28 03:08:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-28 03:08:58,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-28 03:08:58,489 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-28 03:08:58,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-28 03:08:58,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:58,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-28 03:08:58,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,492 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,492 INFO L186 Difference]: Start difference. First operand has 113 places, 78 transitions, 318 flow. Second operand 9 states and 548 transitions. [2021-12-28 03:08:58,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 95 transitions, 499 flow [2021-12-28 03:08:58,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 95 transitions, 465 flow, removed 11 selfloop flow, removed 7 redundant places. [2021-12-28 03:08:58,496 INFO L242 Difference]: Finished difference. Result has 115 places, 74 transitions, 264 flow [2021-12-28 03:08:58,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=264, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2021-12-28 03:08:58,497 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2021-12-28 03:08:58,497 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 264 flow [2021-12-28 03:08:58,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:58,497 INFO L254 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] [2021-12-28 03:08:58,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:08:58,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1111681351, now seen corresponding path program 7 times [2021-12-28 03:08:58,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:58,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264113490] [2021-12-28 03:08:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:58,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:58,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264113490] [2021-12-28 03:08:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264113490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:58,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:58,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:58,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236586161] [2021-12-28 03:08:58,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:58,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:58,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:58,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:58,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:58,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:58,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:58,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:58,735 INFO L129 PetriNetUnfolder]: 20/236 cut-off events. [2021-12-28 03:08:58,735 INFO L130 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2021-12-28 03:08:58,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 236 events. 20/236 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1112 event pairs, 2 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 519. Up to 45 conditions per place. [2021-12-28 03:08:58,736 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 33 selfloop transitions, 5 changer transitions 9/93 dead transitions. [2021-12-28 03:08:58,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 446 flow [2021-12-28 03:08:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 547 transitions. [2021-12-28 03:08:58,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7503429355281207 [2021-12-28 03:08:58,737 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 547 transitions. [2021-12-28 03:08:58,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 547 transitions. [2021-12-28 03:08:58,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:58,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 547 transitions. [2021-12-28 03:08:58,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.77777777777778) internal successors, (547), 9 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,740 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,740 INFO L186 Difference]: Start difference. First operand has 115 places, 74 transitions, 264 flow. Second operand 9 states and 547 transitions. [2021-12-28 03:08:58,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 446 flow [2021-12-28 03:08:58,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 403 flow, removed 18 selfloop flow, removed 10 redundant places. [2021-12-28 03:08:58,743 INFO L242 Difference]: Finished difference. Result has 108 places, 73 transitions, 251 flow [2021-12-28 03:08:58,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2021-12-28 03:08:58,743 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 34 predicate places. [2021-12-28 03:08:58,743 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 251 flow [2021-12-28 03:08:58,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:58,744 INFO L254 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] [2021-12-28 03:08:58,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 03:08:58,744 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:58,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1364185607, now seen corresponding path program 8 times [2021-12-28 03:08:58,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:58,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557559158] [2021-12-28 03:08:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:58,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:58,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:58,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557559158] [2021-12-28 03:08:58,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557559158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:58,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:58,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:58,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659964361] [2021-12-28 03:08:58,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:58,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:58,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:58,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:58,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:58,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 251 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:58,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:58,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:58,982 INFO L129 PetriNetUnfolder]: 18/211 cut-off events. [2021-12-28 03:08:58,982 INFO L130 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2021-12-28 03:08:58,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 211 events. 18/211 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 870 event pairs, 2 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 455. Up to 45 conditions per place. [2021-12-28 03:08:58,983 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 33 selfloop transitions, 2 changer transitions 11/92 dead transitions. [2021-12-28 03:08:58,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 432 flow [2021-12-28 03:08:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-28 03:08:58,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-28 03:08:58,985 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-28 03:08:58,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-28 03:08:58,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:58,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-28 03:08:58,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,987 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,987 INFO L186 Difference]: Start difference. First operand has 108 places, 73 transitions, 251 flow. Second operand 9 states and 548 transitions. [2021-12-28 03:08:58,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 432 flow [2021-12-28 03:08:58,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 381 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-28 03:08:58,989 INFO L242 Difference]: Finished difference. Result has 104 places, 70 transitions, 201 flow [2021-12-28 03:08:58,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=201, PETRI_PLACES=104, PETRI_TRANSITIONS=70} [2021-12-28 03:08:58,990 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2021-12-28 03:08:58,990 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 70 transitions, 201 flow [2021-12-28 03:08:58,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:58,990 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:58,990 INFO L254 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] [2021-12-28 03:08:58,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 03:08:58,991 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1784837601, now seen corresponding path program 9 times [2021-12-28 03:08:58,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:58,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261175103] [2021-12-28 03:08:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:58,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:59,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261175103] [2021-12-28 03:08:59,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261175103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:59,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:59,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:59,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501342967] [2021-12-28 03:08:59,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:59,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:59,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:59,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:59,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 70 transitions, 201 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:59,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:59,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:59,207 INFO L129 PetriNetUnfolder]: 17/200 cut-off events. [2021-12-28 03:08:59,207 INFO L130 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2021-12-28 03:08:59,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 200 events. 17/200 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 789 event pairs, 2 based on Foata normal form. 1/195 useless extension candidates. Maximal degree in co-relation 405. Up to 40 conditions per place. [2021-12-28 03:08:59,208 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 28 selfloop transitions, 5 changer transitions 8/87 dead transitions. [2021-12-28 03:08:59,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 87 transitions, 360 flow [2021-12-28 03:08:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 543 transitions. [2021-12-28 03:08:59,209 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7448559670781894 [2021-12-28 03:08:59,210 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 543 transitions. [2021-12-28 03:08:59,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 543 transitions. [2021-12-28 03:08:59,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:59,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 543 transitions. [2021-12-28 03:08:59,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,212 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,212 INFO L186 Difference]: Start difference. First operand has 104 places, 70 transitions, 201 flow. Second operand 9 states and 543 transitions. [2021-12-28 03:08:59,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 87 transitions, 360 flow [2021-12-28 03:08:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 327 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-12-28 03:08:59,214 INFO L242 Difference]: Finished difference. Result has 99 places, 70 transitions, 199 flow [2021-12-28 03:08:59,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2021-12-28 03:08:59,214 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2021-12-28 03:08:59,214 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 199 flow [2021-12-28 03:08:59,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:59,215 INFO L254 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] [2021-12-28 03:08:59,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 03:08:59,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash -322699621, now seen corresponding path program 10 times [2021-12-28 03:08:59,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769182252] [2021-12-28 03:08:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:59,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:59,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769182252] [2021-12-28 03:08:59,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769182252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:59,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:59,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:59,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767427875] [2021-12-28 03:08:59,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:59,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:59,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:59,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:59,310 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:59,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 199 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:59,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:59,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:59,435 INFO L129 PetriNetUnfolder]: 17/183 cut-off events. [2021-12-28 03:08:59,436 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2021-12-28 03:08:59,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 183 events. 17/183 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 679 event pairs, 2 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 372. Up to 38 conditions per place. [2021-12-28 03:08:59,436 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 25 selfloop transitions, 3 changer transitions 13/85 dead transitions. [2021-12-28 03:08:59,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 85 transitions, 344 flow [2021-12-28 03:08:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 542 transitions. [2021-12-28 03:08:59,437 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7434842249657064 [2021-12-28 03:08:59,438 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 542 transitions. [2021-12-28 03:08:59,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 542 transitions. [2021-12-28 03:08:59,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:59,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 542 transitions. [2021-12-28 03:08:59,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.22222222222222) internal successors, (542), 9 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,440 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,440 INFO L186 Difference]: Start difference. First operand has 99 places, 70 transitions, 199 flow. Second operand 9 states and 542 transitions. [2021-12-28 03:08:59,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 85 transitions, 344 flow [2021-12-28 03:08:59,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 85 transitions, 316 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-28 03:08:59,441 INFO L242 Difference]: Finished difference. Result has 99 places, 66 transitions, 171 flow [2021-12-28 03:08:59,442 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=66} [2021-12-28 03:08:59,442 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2021-12-28 03:08:59,442 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 66 transitions, 171 flow [2021-12-28 03:08:59,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:59,442 INFO L254 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] [2021-12-28 03:08:59,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 03:08:59,443 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1253106300, now seen corresponding path program 1 times [2021-12-28 03:08:59,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:59,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912192944] [2021-12-28 03:08:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:59,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:59,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:59,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912192944] [2021-12-28 03:08:59,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912192944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:59,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:59,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:08:59,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950691708] [2021-12-28 03:08:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:59,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:08:59,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:08:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:08:59,546 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:08:59,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 66 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:59,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:08:59,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:59,768 INFO L129 PetriNetUnfolder]: 26/209 cut-off events. [2021-12-28 03:08:59,768 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2021-12-28 03:08:59,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 209 events. 26/209 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 812 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 440. Up to 30 conditions per place. [2021-12-28 03:08:59,769 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 36 selfloop transitions, 3 changer transitions 21/102 dead transitions. [2021-12-28 03:08:59,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 102 transitions, 496 flow [2021-12-28 03:08:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 03:08:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-28 03:08:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 813 transitions. [2021-12-28 03:08:59,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.716931216931217 [2021-12-28 03:08:59,770 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 813 transitions. [2021-12-28 03:08:59,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 813 transitions. [2021-12-28 03:08:59,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:59,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 813 transitions. [2021-12-28 03:08:59,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,773 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,773 INFO L186 Difference]: Start difference. First operand has 99 places, 66 transitions, 171 flow. Second operand 14 states and 813 transitions. [2021-12-28 03:08:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 102 transitions, 496 flow [2021-12-28 03:08:59,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 407 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-12-28 03:08:59,775 INFO L242 Difference]: Finished difference. Result has 96 places, 66 transitions, 182 flow [2021-12-28 03:08:59,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=182, PETRI_PLACES=96, PETRI_TRANSITIONS=66} [2021-12-28 03:08:59,776 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2021-12-28 03:08:59,776 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 66 transitions, 182 flow [2021-12-28 03:08:59,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:59,776 INFO L254 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] [2021-12-28 03:08:59,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 03:08:59,777 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash 706603769, now seen corresponding path program 1 times [2021-12-28 03:08:59,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:59,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177852906] [2021-12-28 03:08:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:59,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:08:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:08:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:08:59,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:08:59,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177852906] [2021-12-28 03:08:59,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177852906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:08:59,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:08:59,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:08:59,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596955886] [2021-12-28 03:08:59,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:08:59,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:08:59,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:08:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:08:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:08:59,857 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:08:59,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 66 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:08:59,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:08:59,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:08:59,981 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2021-12-28 03:08:59,981 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2021-12-28 03:08:59,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 196 events. 18/196 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 745 event pairs, 8 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 407. Up to 50 conditions per place. [2021-12-28 03:08:59,982 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 35 selfloop transitions, 3 changer transitions 7/89 dead transitions. [2021-12-28 03:08:59,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 390 flow [2021-12-28 03:08:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:08:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:08:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-28 03:08:59,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-28 03:08:59,983 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-28 03:08:59,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-28 03:08:59,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:08:59,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-28 03:08:59,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,988 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,988 INFO L186 Difference]: Start difference. First operand has 96 places, 66 transitions, 182 flow. Second operand 9 states and 548 transitions. [2021-12-28 03:08:59,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 390 flow [2021-12-28 03:08:59,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 322 flow, removed 28 selfloop flow, removed 12 redundant places. [2021-12-28 03:08:59,990 INFO L242 Difference]: Finished difference. Result has 90 places, 68 transitions, 194 flow [2021-12-28 03:08:59,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2021-12-28 03:08:59,991 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2021-12-28 03:08:59,991 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 194 flow [2021-12-28 03:08:59,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:08:59,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:08:59,991 INFO L254 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] [2021-12-28 03:08:59,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 03:08:59,992 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:08:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:08:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1352411004, now seen corresponding path program 2 times [2021-12-28 03:08:59,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:08:59,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964912173] [2021-12-28 03:08:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:08:59,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:00,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:00,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964912173] [2021-12-28 03:09:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964912173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:00,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:00,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:00,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392740334] [2021-12-28 03:09:00,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:00,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:00,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:00,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:00,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:00,075 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:00,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:00,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:00,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:00,333 INFO L129 PetriNetUnfolder]: 28/370 cut-off events. [2021-12-28 03:09:00,333 INFO L130 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2021-12-28 03:09:00,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 370 events. 28/370 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2217 event pairs, 4 based on Foata normal form. 5/369 useless extension candidates. Maximal degree in co-relation 762. Up to 52 conditions per place. [2021-12-28 03:09:00,335 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 62 selfloop transitions, 9 changer transitions 13/126 dead transitions. [2021-12-28 03:09:00,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 624 flow [2021-12-28 03:09:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:09:00,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-28 03:09:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 945 transitions. [2021-12-28 03:09:00,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2021-12-28 03:09:00,336 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 945 transitions. [2021-12-28 03:09:00,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 945 transitions. [2021-12-28 03:09:00,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:00,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 945 transitions. [2021-12-28 03:09:00,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0625) internal successors, (945), 16 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,341 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,341 INFO L186 Difference]: Start difference. First operand has 90 places, 68 transitions, 194 flow. Second operand 16 states and 945 transitions. [2021-12-28 03:09:00,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 624 flow [2021-12-28 03:09:00,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 126 transitions, 573 flow, removed 25 selfloop flow, removed 5 redundant places. [2021-12-28 03:09:00,344 INFO L242 Difference]: Finished difference. Result has 110 places, 75 transitions, 286 flow [2021-12-28 03:09:00,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=286, PETRI_PLACES=110, PETRI_TRANSITIONS=75} [2021-12-28 03:09:00,345 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2021-12-28 03:09:00,345 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 75 transitions, 286 flow [2021-12-28 03:09:00,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:00,345 INFO L254 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] [2021-12-28 03:09:00,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 03:09:00,345 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:00,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:00,346 INFO L85 PathProgramCache]: Analyzing trace with hash -631538826, now seen corresponding path program 3 times [2021-12-28 03:09:00,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:00,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590216162] [2021-12-28 03:09:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:00,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:00,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590216162] [2021-12-28 03:09:00,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590216162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:00,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:00,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:00,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757556022] [2021-12-28 03:09:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:00,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:00,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:00,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:00,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 75 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:00,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:00,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:00,630 INFO L129 PetriNetUnfolder]: 23/361 cut-off events. [2021-12-28 03:09:00,630 INFO L130 PetriNetUnfolder]: For 507/510 co-relation queries the response was YES. [2021-12-28 03:09:00,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 361 events. 23/361 cut-off events. For 507/510 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2202 event pairs, 3 based on Foata normal form. 2/355 useless extension candidates. Maximal degree in co-relation 859. Up to 84 conditions per place. [2021-12-28 03:09:00,632 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 33 selfloop transitions, 10 changer transitions 12/97 dead transitions. [2021-12-28 03:09:00,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 97 transitions, 534 flow [2021-12-28 03:09:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-28 03:09:00,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-28 03:09:00,633 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-28 03:09:00,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-28 03:09:00,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:00,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-28 03:09:00,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,635 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,635 INFO L186 Difference]: Start difference. First operand has 110 places, 75 transitions, 286 flow. Second operand 10 states and 583 transitions. [2021-12-28 03:09:00,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 97 transitions, 534 flow [2021-12-28 03:09:00,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 97 transitions, 504 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-12-28 03:09:00,639 INFO L242 Difference]: Finished difference. Result has 111 places, 75 transitions, 305 flow [2021-12-28 03:09:00,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=305, PETRI_PLACES=111, PETRI_TRANSITIONS=75} [2021-12-28 03:09:00,640 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2021-12-28 03:09:00,640 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 75 transitions, 305 flow [2021-12-28 03:09:00,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:00,640 INFO L254 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] [2021-12-28 03:09:00,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 03:09:00,641 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1379330042, now seen corresponding path program 4 times [2021-12-28 03:09:00,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:00,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459711424] [2021-12-28 03:09:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:00,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:00,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:00,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459711424] [2021-12-28 03:09:00,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459711424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:00,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:00,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:00,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704397206] [2021-12-28 03:09:00,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:00,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:00,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:00,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:00,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:00,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:00,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 75 transitions, 305 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:00,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:00,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:00,884 INFO L129 PetriNetUnfolder]: 28/408 cut-off events. [2021-12-28 03:09:00,884 INFO L130 PetriNetUnfolder]: For 887/890 co-relation queries the response was YES. [2021-12-28 03:09:00,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 408 events. 28/408 cut-off events. For 887/890 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2623 event pairs, 8 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 1038. Up to 119 conditions per place. [2021-12-28 03:09:00,886 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 50 selfloop transitions, 6 changer transitions 11/109 dead transitions. [2021-12-28 03:09:00,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 109 transitions, 724 flow [2021-12-28 03:09:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 593 transitions. [2021-12-28 03:09:00,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7320987654320987 [2021-12-28 03:09:00,887 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 593 transitions. [2021-12-28 03:09:00,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 593 transitions. [2021-12-28 03:09:00,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:00,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 593 transitions. [2021-12-28 03:09:00,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.3) internal successors, (593), 10 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,889 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,889 INFO L186 Difference]: Start difference. First operand has 111 places, 75 transitions, 305 flow. Second operand 10 states and 593 transitions. [2021-12-28 03:09:00,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 109 transitions, 724 flow [2021-12-28 03:09:00,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 657 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-12-28 03:09:00,893 INFO L242 Difference]: Finished difference. Result has 114 places, 77 transitions, 327 flow [2021-12-28 03:09:00,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=327, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2021-12-28 03:09:00,893 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2021-12-28 03:09:00,893 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 327 flow [2021-12-28 03:09:00,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,894 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:00,894 INFO L254 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] [2021-12-28 03:09:00,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 03:09:00,895 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1732848334, now seen corresponding path program 5 times [2021-12-28 03:09:00,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375484072] [2021-12-28 03:09:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:00,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:00,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:00,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375484072] [2021-12-28 03:09:00,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375484072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:00,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:00,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:00,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008244527] [2021-12-28 03:09:00,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:00,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:00,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:00,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:00,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:00,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 77 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:00,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:00,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:00,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:01,131 INFO L129 PetriNetUnfolder]: 24/436 cut-off events. [2021-12-28 03:09:01,131 INFO L130 PetriNetUnfolder]: For 894/900 co-relation queries the response was YES. [2021-12-28 03:09:01,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 436 events. 24/436 cut-off events. For 894/900 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2975 event pairs, 12 based on Foata normal form. 4/429 useless extension candidates. Maximal degree in co-relation 1083. Up to 76 conditions per place. [2021-12-28 03:09:01,133 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 64 selfloop transitions, 8 changer transitions 9/123 dead transitions. [2021-12-28 03:09:01,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 123 transitions, 779 flow [2021-12-28 03:09:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 610 transitions. [2021-12-28 03:09:01,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-28 03:09:01,135 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 610 transitions. [2021-12-28 03:09:01,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 610 transitions. [2021-12-28 03:09:01,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:01,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 610 transitions. [2021-12-28 03:09:01,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,137 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,137 INFO L186 Difference]: Start difference. First operand has 114 places, 77 transitions, 327 flow. Second operand 10 states and 610 transitions. [2021-12-28 03:09:01,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 123 transitions, 779 flow [2021-12-28 03:09:01,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 723 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-12-28 03:09:01,141 INFO L242 Difference]: Finished difference. Result has 120 places, 81 transitions, 401 flow [2021-12-28 03:09:01,141 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=401, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2021-12-28 03:09:01,142 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 46 predicate places. [2021-12-28 03:09:01,142 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 401 flow [2021-12-28 03:09:01,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,142 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:01,142 INFO L254 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] [2021-12-28 03:09:01,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 03:09:01,143 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1744902709, now seen corresponding path program 2 times [2021-12-28 03:09:01,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:01,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496214504] [2021-12-28 03:09:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:01,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:01,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:01,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496214504] [2021-12-28 03:09:01,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496214504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:01,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:01,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:09:01,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078568023] [2021-12-28 03:09:01,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:01,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:09:01,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:01,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:09:01,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:09:01,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:09:01,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 401 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:01,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:09:01,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:01,361 INFO L129 PetriNetUnfolder]: 21/419 cut-off events. [2021-12-28 03:09:01,361 INFO L130 PetriNetUnfolder]: For 977/983 co-relation queries the response was YES. [2021-12-28 03:09:01,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 419 events. 21/419 cut-off events. For 977/983 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2780 event pairs, 19 based on Foata normal form. 1/411 useless extension candidates. Maximal degree in co-relation 1073. Up to 100 conditions per place. [2021-12-28 03:09:01,363 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 49 selfloop transitions, 7 changer transitions 7/109 dead transitions. [2021-12-28 03:09:01,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 109 transitions, 702 flow [2021-12-28 03:09:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:09:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:09:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 552 transitions. [2021-12-28 03:09:01,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.757201646090535 [2021-12-28 03:09:01,365 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 552 transitions. [2021-12-28 03:09:01,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 552 transitions. [2021-12-28 03:09:01,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:01,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 552 transitions. [2021-12-28 03:09:01,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.333333333333336) internal successors, (552), 9 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,379 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,380 INFO L186 Difference]: Start difference. First operand has 120 places, 81 transitions, 401 flow. Second operand 9 states and 552 transitions. [2021-12-28 03:09:01,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 109 transitions, 702 flow [2021-12-28 03:09:01,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 109 transitions, 658 flow, removed 19 selfloop flow, removed 5 redundant places. [2021-12-28 03:09:01,384 INFO L242 Difference]: Finished difference. Result has 127 places, 84 transitions, 450 flow [2021-12-28 03:09:01,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=127, PETRI_TRANSITIONS=84} [2021-12-28 03:09:01,385 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 53 predicate places. [2021-12-28 03:09:01,385 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 84 transitions, 450 flow [2021-12-28 03:09:01,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:01,386 INFO L254 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] [2021-12-28 03:09:01,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 03:09:01,386 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash 307404330, now seen corresponding path program 6 times [2021-12-28 03:09:01,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:01,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114304554] [2021-12-28 03:09:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:01,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:01,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:01,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114304554] [2021-12-28 03:09:01,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114304554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:01,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:01,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:01,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220680915] [2021-12-28 03:09:01,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:01,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:01,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:01,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:01,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:01,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:01,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 84 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:01,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:01,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:01,633 INFO L129 PetriNetUnfolder]: 21/442 cut-off events. [2021-12-28 03:09:01,633 INFO L130 PetriNetUnfolder]: For 1205/1217 co-relation queries the response was YES. [2021-12-28 03:09:01,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 442 events. 21/442 cut-off events. For 1205/1217 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3004 event pairs, 10 based on Foata normal form. 3/437 useless extension candidates. Maximal degree in co-relation 1160. Up to 135 conditions per place. [2021-12-28 03:09:01,636 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 43 selfloop transitions, 16 changer transitions 10/111 dead transitions. [2021-12-28 03:09:01,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 111 transitions, 797 flow [2021-12-28 03:09:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 588 transitions. [2021-12-28 03:09:01,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2021-12-28 03:09:01,640 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 588 transitions. [2021-12-28 03:09:01,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 588 transitions. [2021-12-28 03:09:01,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:01,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 588 transitions. [2021-12-28 03:09:01,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.8) internal successors, (588), 10 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) [2021-12-28 03:09:01,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,643 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,643 INFO L186 Difference]: Start difference. First operand has 127 places, 84 transitions, 450 flow. Second operand 10 states and 588 transitions. [2021-12-28 03:09:01,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 111 transitions, 797 flow [2021-12-28 03:09:01,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 111 transitions, 761 flow, removed 16 selfloop flow, removed 4 redundant places. [2021-12-28 03:09:01,648 INFO L242 Difference]: Finished difference. Result has 136 places, 87 transitions, 526 flow [2021-12-28 03:09:01,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=526, PETRI_PLACES=136, PETRI_TRANSITIONS=87} [2021-12-28 03:09:01,649 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 62 predicate places. [2021-12-28 03:09:01,649 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 87 transitions, 526 flow [2021-12-28 03:09:01,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:01,650 INFO L254 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] [2021-12-28 03:09:01,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 03:09:01,650 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:01,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 260750753, now seen corresponding path program 3 times [2021-12-28 03:09:01,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:01,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662909468] [2021-12-28 03:09:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:01,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:01,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:01,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662909468] [2021-12-28 03:09:01,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662909468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:01,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:01,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:09:01,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999498796] [2021-12-28 03:09:01,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:01,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:09:01,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:09:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:09:01,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:09:01,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 87 transitions, 526 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:01,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:09:01,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:01,867 INFO L129 PetriNetUnfolder]: 18/451 cut-off events. [2021-12-28 03:09:01,868 INFO L130 PetriNetUnfolder]: For 1490/1504 co-relation queries the response was YES. [2021-12-28 03:09:01,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 451 events. 18/451 cut-off events. For 1490/1504 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3153 event pairs, 4 based on Foata normal form. 5/450 useless extension candidates. Maximal degree in co-relation 1217. Up to 125 conditions per place. [2021-12-28 03:09:01,870 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 47 selfloop transitions, 12 changer transitions 13/118 dead transitions. [2021-12-28 03:09:01,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 118 transitions, 940 flow [2021-12-28 03:09:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:09:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:09:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2021-12-28 03:09:01,872 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-28 03:09:01,873 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2021-12-28 03:09:01,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2021-12-28 03:09:01,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:01,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2021-12-28 03:09:01,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,875 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,875 INFO L186 Difference]: Start difference. First operand has 136 places, 87 transitions, 526 flow. Second operand 9 states and 549 transitions. [2021-12-28 03:09:01,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 118 transitions, 940 flow [2021-12-28 03:09:01,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 118 transitions, 880 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-12-28 03:09:01,882 INFO L242 Difference]: Finished difference. Result has 142 places, 89 transitions, 574 flow [2021-12-28 03:09:01,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=574, PETRI_PLACES=142, PETRI_TRANSITIONS=89} [2021-12-28 03:09:01,882 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 68 predicate places. [2021-12-28 03:09:01,882 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 89 transitions, 574 flow [2021-12-28 03:09:01,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:01,883 INFO L254 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] [2021-12-28 03:09:01,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 03:09:01,883 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:01,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -658061558, now seen corresponding path program 7 times [2021-12-28 03:09:01,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:01,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803084443] [2021-12-28 03:09:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:01,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:01,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:01,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803084443] [2021-12-28 03:09:01,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803084443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:01,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:01,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850567193] [2021-12-28 03:09:01,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:01,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:01,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:01,980 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:01,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 89 transitions, 574 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:01,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:01,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:01,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:02,153 INFO L129 PetriNetUnfolder]: 17/418 cut-off events. [2021-12-28 03:09:02,154 INFO L130 PetriNetUnfolder]: For 1553/1567 co-relation queries the response was YES. [2021-12-28 03:09:02,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 418 events. 17/418 cut-off events. For 1553/1567 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2820 event pairs, 11 based on Foata normal form. 5/415 useless extension candidates. Maximal degree in co-relation 1158. Up to 86 conditions per place. [2021-12-28 03:09:02,156 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 59 selfloop transitions, 12 changer transitions 11/124 dead transitions. [2021-12-28 03:09:02,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 124 transitions, 1038 flow [2021-12-28 03:09:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 597 transitions. [2021-12-28 03:09:02,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.737037037037037 [2021-12-28 03:09:02,158 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 597 transitions. [2021-12-28 03:09:02,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 597 transitions. [2021-12-28 03:09:02,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:02,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 597 transitions. [2021-12-28 03:09:02,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.7) internal successors, (597), 10 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,160 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,160 INFO L186 Difference]: Start difference. First operand has 142 places, 89 transitions, 574 flow. Second operand 10 states and 597 transitions. [2021-12-28 03:09:02,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 124 transitions, 1038 flow [2021-12-28 03:09:02,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 124 transitions, 981 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-12-28 03:09:02,167 INFO L242 Difference]: Finished difference. Result has 151 places, 94 transitions, 675 flow [2021-12-28 03:09:02,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=675, PETRI_PLACES=151, PETRI_TRANSITIONS=94} [2021-12-28 03:09:02,168 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 77 predicate places. [2021-12-28 03:09:02,168 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 94 transitions, 675 flow [2021-12-28 03:09:02,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,168 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:02,168 INFO L254 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] [2021-12-28 03:09:02,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 03:09:02,169 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash 432307051, now seen corresponding path program 4 times [2021-12-28 03:09:02,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:02,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523763870] [2021-12-28 03:09:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:02,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:02,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:02,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523763870] [2021-12-28 03:09:02,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523763870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:02,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:02,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:09:02,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040554810] [2021-12-28 03:09:02,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:02,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:09:02,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:09:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:09:02,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:09:02,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 94 transitions, 675 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:02,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:09:02,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:02,384 INFO L129 PetriNetUnfolder]: 17/403 cut-off events. [2021-12-28 03:09:02,384 INFO L130 PetriNetUnfolder]: For 1636/1652 co-relation queries the response was YES. [2021-12-28 03:09:02,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 403 events. 17/403 cut-off events. For 1636/1652 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2658 event pairs, 7 based on Foata normal form. 6/401 useless extension candidates. Maximal degree in co-relation 1162. Up to 124 conditions per place. [2021-12-28 03:09:02,386 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 40 selfloop transitions, 10 changer transitions 19/115 dead transitions. [2021-12-28 03:09:02,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 115 transitions, 1043 flow [2021-12-28 03:09:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:09:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:09:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 543 transitions. [2021-12-28 03:09:02,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7448559670781894 [2021-12-28 03:09:02,387 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 543 transitions. [2021-12-28 03:09:02,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 543 transitions. [2021-12-28 03:09:02,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:02,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 543 transitions. [2021-12-28 03:09:02,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,389 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,389 INFO L186 Difference]: Start difference. First operand has 151 places, 94 transitions, 675 flow. Second operand 9 states and 543 transitions. [2021-12-28 03:09:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 115 transitions, 1043 flow [2021-12-28 03:09:02,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 115 transitions, 1006 flow, removed 17 selfloop flow, removed 5 redundant places. [2021-12-28 03:09:02,396 INFO L242 Difference]: Finished difference. Result has 154 places, 90 transitions, 594 flow [2021-12-28 03:09:02,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=154, PETRI_TRANSITIONS=90} [2021-12-28 03:09:02,396 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 80 predicate places. [2021-12-28 03:09:02,396 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 90 transitions, 594 flow [2021-12-28 03:09:02,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:02,397 INFO L254 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] [2021-12-28 03:09:02,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 03:09:02,397 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash -881258538, now seen corresponding path program 8 times [2021-12-28 03:09:02,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:02,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894530263] [2021-12-28 03:09:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:02,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:02,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894530263] [2021-12-28 03:09:02,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894530263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:02,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:02,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:02,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370144562] [2021-12-28 03:09:02,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:02,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:02,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:02,477 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:02,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 90 transitions, 594 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:02,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:02,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:02,651 INFO L129 PetriNetUnfolder]: 14/364 cut-off events. [2021-12-28 03:09:02,652 INFO L130 PetriNetUnfolder]: For 1374/1391 co-relation queries the response was YES. [2021-12-28 03:09:02,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 364 events. 14/364 cut-off events. For 1374/1391 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2264 event pairs, 4 based on Foata normal form. 5/363 useless extension candidates. Maximal degree in co-relation 1015. Up to 109 conditions per place. [2021-12-28 03:09:02,654 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 48 selfloop transitions, 13 changer transitions 13/116 dead transitions. [2021-12-28 03:09:02,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 116 transitions, 958 flow [2021-12-28 03:09:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-28 03:09:02,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-28 03:09:02,656 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-28 03:09:02,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-28 03:09:02,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:02,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-28 03:09:02,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,658 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,658 INFO L186 Difference]: Start difference. First operand has 154 places, 90 transitions, 594 flow. Second operand 10 states and 590 transitions. [2021-12-28 03:09:02,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 116 transitions, 958 flow [2021-12-28 03:09:02,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 116 transitions, 908 flow, removed 18 selfloop flow, removed 8 redundant places. [2021-12-28 03:09:02,664 INFO L242 Difference]: Finished difference. Result has 153 places, 91 transitions, 615 flow [2021-12-28 03:09:02,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=615, PETRI_PLACES=153, PETRI_TRANSITIONS=91} [2021-12-28 03:09:02,665 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 79 predicate places. [2021-12-28 03:09:02,665 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 91 transitions, 615 flow [2021-12-28 03:09:02,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:02,666 INFO L254 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] [2021-12-28 03:09:02,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 03:09:02,666 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:02,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2144980316, now seen corresponding path program 9 times [2021-12-28 03:09:02,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:02,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630662174] [2021-12-28 03:09:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:02,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:02,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:02,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630662174] [2021-12-28 03:09:02,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630662174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:02,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:02,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:02,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970124371] [2021-12-28 03:09:02,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:02,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:02,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:02,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:02,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 91 transitions, 615 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:02,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:02,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:02,892 INFO L129 PetriNetUnfolder]: 13/346 cut-off events. [2021-12-28 03:09:02,892 INFO L130 PetriNetUnfolder]: For 1285/1299 co-relation queries the response was YES. [2021-12-28 03:09:02,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 346 events. 13/346 cut-off events. For 1285/1299 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2081 event pairs, 5 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 978. Up to 109 conditions per place. [2021-12-28 03:09:02,894 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 40 selfloop transitions, 10 changer transitions 17/109 dead transitions. [2021-12-28 03:09:02,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 109 transitions, 917 flow [2021-12-28 03:09:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-28 03:09:02,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-28 03:09:02,895 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-28 03:09:02,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-28 03:09:02,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:02,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-28 03:09:02,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,897 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,897 INFO L186 Difference]: Start difference. First operand has 153 places, 91 transitions, 615 flow. Second operand 10 states and 583 transitions. [2021-12-28 03:09:02,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 109 transitions, 917 flow [2021-12-28 03:09:02,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 109 transitions, 875 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-28 03:09:02,903 INFO L242 Difference]: Finished difference. Result has 155 places, 88 transitions, 568 flow [2021-12-28 03:09:02,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=568, PETRI_PLACES=155, PETRI_TRANSITIONS=88} [2021-12-28 03:09:02,903 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 81 predicate places. [2021-12-28 03:09:02,903 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 88 transitions, 568 flow [2021-12-28 03:09:02,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:02,904 INFO L254 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] [2021-12-28 03:09:02,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 03:09:02,904 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1232039598, now seen corresponding path program 10 times [2021-12-28 03:09:02,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:02,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460426898] [2021-12-28 03:09:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:02,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:02,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:02,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460426898] [2021-12-28 03:09:02,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460426898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:02,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:02,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:02,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426182858] [2021-12-28 03:09:02,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:02,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:02,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:02,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:02,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 88 transitions, 568 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:02,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:02,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:02,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:03,134 INFO L129 PetriNetUnfolder]: 13/312 cut-off events. [2021-12-28 03:09:03,135 INFO L130 PetriNetUnfolder]: For 1246/1262 co-relation queries the response was YES. [2021-12-28 03:09:03,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 312 events. 13/312 cut-off events. For 1246/1262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1781 event pairs, 7 based on Foata normal form. 7/314 useless extension candidates. Maximal degree in co-relation 908. Up to 73 conditions per place. [2021-12-28 03:09:03,136 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 46 selfloop transitions, 9 changer transitions 12/109 dead transitions. [2021-12-28 03:09:03,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 109 transitions, 878 flow [2021-12-28 03:09:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-28 03:09:03,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-28 03:09:03,138 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-28 03:09:03,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-28 03:09:03,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:03,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-28 03:09:03,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,140 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,140 INFO L186 Difference]: Start difference. First operand has 155 places, 88 transitions, 568 flow. Second operand 10 states and 590 transitions. [2021-12-28 03:09:03,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 109 transitions, 878 flow [2021-12-28 03:09:03,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 109 transitions, 822 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-12-28 03:09:03,146 INFO L242 Difference]: Finished difference. Result has 151 places, 88 transitions, 576 flow [2021-12-28 03:09:03,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=576, PETRI_PLACES=151, PETRI_TRANSITIONS=88} [2021-12-28 03:09:03,146 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 77 predicate places. [2021-12-28 03:09:03,146 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 88 transitions, 576 flow [2021-12-28 03:09:03,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:03,147 INFO L254 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] [2021-12-28 03:09:03,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 03:09:03,147 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:03,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:03,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1022226839, now seen corresponding path program 5 times [2021-12-28 03:09:03,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:03,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959642978] [2021-12-28 03:09:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:03,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:03,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:03,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959642978] [2021-12-28 03:09:03,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959642978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:03,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:03,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 03:09:03,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783382869] [2021-12-28 03:09:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:03,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 03:09:03,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:03,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 03:09:03,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:09:03,243 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-28 03:09:03,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 88 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:03,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-28 03:09:03,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:03,352 INFO L129 PetriNetUnfolder]: 11/286 cut-off events. [2021-12-28 03:09:03,352 INFO L130 PetriNetUnfolder]: For 1098/1112 co-relation queries the response was YES. [2021-12-28 03:09:03,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 286 events. 11/286 cut-off events. For 1098/1112 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1555 event pairs, 8 based on Foata normal form. 6/287 useless extension candidates. Maximal degree in co-relation 844. Up to 86 conditions per place. [2021-12-28 03:09:03,353 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 34 selfloop transitions, 4 changer transitions 20/103 dead transitions. [2021-12-28 03:09:03,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 103 transitions, 832 flow [2021-12-28 03:09:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:09:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 03:09:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 541 transitions. [2021-12-28 03:09:03,357 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421124828532236 [2021-12-28 03:09:03,357 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 541 transitions. [2021-12-28 03:09:03,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 541 transitions. [2021-12-28 03:09:03,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:03,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 541 transitions. [2021-12-28 03:09:03,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.111111111111114) internal successors, (541), 9 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,359 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,359 INFO L186 Difference]: Start difference. First operand has 151 places, 88 transitions, 576 flow. Second operand 9 states and 541 transitions. [2021-12-28 03:09:03,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 103 transitions, 832 flow [2021-12-28 03:09:03,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 103 transitions, 779 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-28 03:09:03,364 INFO L242 Difference]: Finished difference. Result has 149 places, 82 transitions, 452 flow [2021-12-28 03:09:03,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=149, PETRI_TRANSITIONS=82} [2021-12-28 03:09:03,366 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 75 predicate places. [2021-12-28 03:09:03,367 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 82 transitions, 452 flow [2021-12-28 03:09:03,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:03,367 INFO L254 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] [2021-12-28 03:09:03,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-28 03:09:03,367 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2140697048, now seen corresponding path program 11 times [2021-12-28 03:09:03,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:03,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963930340] [2021-12-28 03:09:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:03,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:03,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:03,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963930340] [2021-12-28 03:09:03,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963930340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:03,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:03,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:03,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358540555] [2021-12-28 03:09:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:03,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:03,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:03,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:03,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 82 transitions, 452 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:03,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:03,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:03,600 INFO L129 PetriNetUnfolder]: 11/229 cut-off events. [2021-12-28 03:09:03,600 INFO L130 PetriNetUnfolder]: For 725/738 co-relation queries the response was YES. [2021-12-28 03:09:03,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 229 events. 11/229 cut-off events. For 725/738 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1031 event pairs, 7 based on Foata normal form. 6/229 useless extension candidates. Maximal degree in co-relation 670. Up to 60 conditions per place. [2021-12-28 03:09:03,601 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 40 selfloop transitions, 6 changer transitions 13/101 dead transitions. [2021-12-28 03:09:03,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 101 transitions, 693 flow [2021-12-28 03:09:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2021-12-28 03:09:03,602 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7271604938271605 [2021-12-28 03:09:03,602 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2021-12-28 03:09:03,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2021-12-28 03:09:03,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:03,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2021-12-28 03:09:03,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,607 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,607 INFO L186 Difference]: Start difference. First operand has 149 places, 82 transitions, 452 flow. Second operand 10 states and 589 transitions. [2021-12-28 03:09:03,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 101 transitions, 693 flow [2021-12-28 03:09:03,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 101 transitions, 648 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-12-28 03:09:03,611 INFO L242 Difference]: Finished difference. Result has 140 places, 79 transitions, 403 flow [2021-12-28 03:09:03,611 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=140, PETRI_TRANSITIONS=79} [2021-12-28 03:09:03,612 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 66 predicate places. [2021-12-28 03:09:03,613 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 79 transitions, 403 flow [2021-12-28 03:09:03,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,613 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:03,613 INFO L254 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] [2021-12-28 03:09:03,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-28 03:09:03,613 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:03,613 INFO L85 PathProgramCache]: Analyzing trace with hash 112076268, now seen corresponding path program 12 times [2021-12-28 03:09:03,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:03,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524795309] [2021-12-28 03:09:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:03,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:03,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524795309] [2021-12-28 03:09:03,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524795309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:03,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:03,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:03,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125200187] [2021-12-28 03:09:03,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:03,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:03,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:03,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:03,704 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:03,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 79 transitions, 403 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:03,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:03,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:03,856 INFO L129 PetriNetUnfolder]: 10/220 cut-off events. [2021-12-28 03:09:03,856 INFO L130 PetriNetUnfolder]: For 534/545 co-relation queries the response was YES. [2021-12-28 03:09:03,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 220 events. 10/220 cut-off events. For 534/545 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 951 event pairs, 7 based on Foata normal form. 5/220 useless extension candidates. Maximal degree in co-relation 617. Up to 60 conditions per place. [2021-12-28 03:09:03,857 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 38 selfloop transitions, 7 changer transitions 11/98 dead transitions. [2021-12-28 03:09:03,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 98 transitions, 636 flow [2021-12-28 03:09:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 587 transitions. [2021-12-28 03:09:03,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7246913580246913 [2021-12-28 03:09:03,859 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 587 transitions. [2021-12-28 03:09:03,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 587 transitions. [2021-12-28 03:09:03,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:03,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 587 transitions. [2021-12-28 03:09:03,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.7) internal successors, (587), 10 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) [2021-12-28 03:09:03,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,860 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,860 INFO L186 Difference]: Start difference. First operand has 140 places, 79 transitions, 403 flow. Second operand 10 states and 587 transitions. [2021-12-28 03:09:03,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 98 transitions, 636 flow [2021-12-28 03:09:03,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 98 transitions, 584 flow, removed 16 selfloop flow, removed 11 redundant places. [2021-12-28 03:09:03,864 INFO L242 Difference]: Finished difference. Result has 137 places, 80 transitions, 415 flow [2021-12-28 03:09:03,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=415, PETRI_PLACES=137, PETRI_TRANSITIONS=80} [2021-12-28 03:09:03,865 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 63 predicate places. [2021-12-28 03:09:03,865 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 80 transitions, 415 flow [2021-12-28 03:09:03,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:03,865 INFO L254 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] [2021-12-28 03:09:03,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-28 03:09:03,865 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:03,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1443359976, now seen corresponding path program 13 times [2021-12-28 03:09:03,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:03,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505849509] [2021-12-28 03:09:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:03,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:03,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505849509] [2021-12-28 03:09:03,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505849509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:03,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:03,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:03,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203769107] [2021-12-28 03:09:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:03,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:03,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:03,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 80 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:03,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:03,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:03,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:04,102 INFO L129 PetriNetUnfolder]: 10/204 cut-off events. [2021-12-28 03:09:04,103 INFO L130 PetriNetUnfolder]: For 458/469 co-relation queries the response was YES. [2021-12-28 03:09:04,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 204 events. 10/204 cut-off events. For 458/469 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 837 event pairs, 7 based on Foata normal form. 5/203 useless extension candidates. Maximal degree in co-relation 571. Up to 60 conditions per place. [2021-12-28 03:09:04,104 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 29 selfloop transitions, 3 changer transitions 17/91 dead transitions. [2021-12-28 03:09:04,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 91 transitions, 588 flow [2021-12-28 03:09:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 580 transitions. [2021-12-28 03:09:04,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7160493827160493 [2021-12-28 03:09:04,105 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 580 transitions. [2021-12-28 03:09:04,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 580 transitions. [2021-12-28 03:09:04,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:04,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 580 transitions. [2021-12-28 03:09:04,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,107 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,107 INFO L186 Difference]: Start difference. First operand has 137 places, 80 transitions, 415 flow. Second operand 10 states and 580 transitions. [2021-12-28 03:09:04,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 91 transitions, 588 flow [2021-12-28 03:09:04,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 91 transitions, 551 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-12-28 03:09:04,110 INFO L242 Difference]: Finished difference. Result has 138 places, 74 transitions, 331 flow [2021-12-28 03:09:04,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=331, PETRI_PLACES=138, PETRI_TRANSITIONS=74} [2021-12-28 03:09:04,110 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 64 predicate places. [2021-12-28 03:09:04,110 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 74 transitions, 331 flow [2021-12-28 03:09:04,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:04,111 INFO L254 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] [2021-12-28 03:09:04,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-28 03:09:04,111 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:04,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2036479358, now seen corresponding path program 14 times [2021-12-28 03:09:04,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:04,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23794095] [2021-12-28 03:09:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:04,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:04,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23794095] [2021-12-28 03:09:04,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23794095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:04,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:04,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:04,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346521270] [2021-12-28 03:09:04,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:04,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:04,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:04,218 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:04,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 74 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:04,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:04,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:04,357 INFO L129 PetriNetUnfolder]: 7/167 cut-off events. [2021-12-28 03:09:04,358 INFO L130 PetriNetUnfolder]: For 325/334 co-relation queries the response was YES. [2021-12-28 03:09:04,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 167 events. 7/167 cut-off events. For 325/334 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 567 event pairs, 0 based on Foata normal form. 4/168 useless extension candidates. Maximal degree in co-relation 445. Up to 31 conditions per place. [2021-12-28 03:09:04,359 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 26 selfloop transitions, 10 changer transitions 11/89 dead transitions. [2021-12-28 03:09:04,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 89 transitions, 541 flow [2021-12-28 03:09:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 577 transitions. [2021-12-28 03:09:04,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7123456790123457 [2021-12-28 03:09:04,361 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 577 transitions. [2021-12-28 03:09:04,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 577 transitions. [2021-12-28 03:09:04,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:04,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 577 transitions. [2021-12-28 03:09:04,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.7) internal successors, (577), 10 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,363 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,363 INFO L186 Difference]: Start difference. First operand has 138 places, 74 transitions, 331 flow. Second operand 10 states and 577 transitions. [2021-12-28 03:09:04,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 89 transitions, 541 flow [2021-12-28 03:09:04,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 89 transitions, 492 flow, removed 16 selfloop flow, removed 13 redundant places. [2021-12-28 03:09:04,365 INFO L242 Difference]: Finished difference. Result has 123 places, 74 transitions, 327 flow [2021-12-28 03:09:04,366 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=327, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2021-12-28 03:09:04,366 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2021-12-28 03:09:04,366 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 327 flow [2021-12-28 03:09:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:04,366 INFO L254 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] [2021-12-28 03:09:04,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-28 03:09:04,366 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash 635828710, now seen corresponding path program 15 times [2021-12-28 03:09:04,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:04,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602614629] [2021-12-28 03:09:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:04,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:04,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:04,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602614629] [2021-12-28 03:09:04,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602614629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:04,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:04,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:04,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096810051] [2021-12-28 03:09:04,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:04,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:04,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:04,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:04,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:04,464 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,464 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:04,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:04,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:04,611 INFO L129 PetriNetUnfolder]: 5/192 cut-off events. [2021-12-28 03:09:04,611 INFO L130 PetriNetUnfolder]: For 337/346 co-relation queries the response was YES. [2021-12-28 03:09:04,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 192 events. 5/192 cut-off events. For 337/346 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 773 event pairs, 4 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2021-12-28 03:09:04,612 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 41 selfloop transitions, 7 changer transitions 9/99 dead transitions. [2021-12-28 03:09:04,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 571 flow [2021-12-28 03:09:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-28 03:09:04,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-28 03:09:04,613 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-28 03:09:04,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-28 03:09:04,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:04,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-28 03:09:04,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,616 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,616 INFO L186 Difference]: Start difference. First operand has 123 places, 74 transitions, 327 flow. Second operand 10 states and 590 transitions. [2021-12-28 03:09:04,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 571 flow [2021-12-28 03:09:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 515 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-28 03:09:04,618 INFO L242 Difference]: Finished difference. Result has 125 places, 76 transitions, 347 flow [2021-12-28 03:09:04,618 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=125, PETRI_TRANSITIONS=76} [2021-12-28 03:09:04,619 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 51 predicate places. [2021-12-28 03:09:04,619 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 76 transitions, 347 flow [2021-12-28 03:09:04,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,620 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:04,620 INFO L254 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] [2021-12-28 03:09:04,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-28 03:09:04,620 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash -625509532, now seen corresponding path program 16 times [2021-12-28 03:09:04,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:04,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940716030] [2021-12-28 03:09:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:04,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:04,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:04,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940716030] [2021-12-28 03:09:04,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940716030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:04,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:04,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:04,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239209018] [2021-12-28 03:09:04,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:04,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:04,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:04,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:04,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 76 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:04,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:04,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:04,851 INFO L129 PetriNetUnfolder]: 4/187 cut-off events. [2021-12-28 03:09:04,851 INFO L130 PetriNetUnfolder]: For 272/280 co-relation queries the response was YES. [2021-12-28 03:09:04,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 187 events. 4/187 cut-off events. For 272/280 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 730 event pairs, 1 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 484. Up to 39 conditions per place. [2021-12-28 03:09:04,852 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 35 selfloop transitions, 10 changer transitions 9/96 dead transitions. [2021-12-28 03:09:04,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 96 transitions, 580 flow [2021-12-28 03:09:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-28 03:09:04,854 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-28 03:09:04,854 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-28 03:09:04,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-28 03:09:04,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:04,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-28 03:09:04,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,855 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,856 INFO L186 Difference]: Start difference. First operand has 125 places, 76 transitions, 347 flow. Second operand 10 states and 583 transitions. [2021-12-28 03:09:04,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 96 transitions, 580 flow [2021-12-28 03:09:04,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 96 transitions, 552 flow, removed 9 selfloop flow, removed 6 redundant places. [2021-12-28 03:09:04,858 INFO L242 Difference]: Finished difference. Result has 130 places, 77 transitions, 380 flow [2021-12-28 03:09:04,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=380, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-12-28 03:09:04,858 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 56 predicate places. [2021-12-28 03:09:04,858 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 380 flow [2021-12-28 03:09:04,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:04,859 INFO L254 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] [2021-12-28 03:09:04,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-28 03:09:04,859 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:04,860 INFO L85 PathProgramCache]: Analyzing trace with hash 383792464, now seen corresponding path program 17 times [2021-12-28 03:09:04,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:04,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7135262] [2021-12-28 03:09:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:04,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:04,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:04,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7135262] [2021-12-28 03:09:04,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7135262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:04,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:04,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:04,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520588572] [2021-12-28 03:09:04,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:04,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:04,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:04,947 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:04,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 77 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:04,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:04,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:04,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:05,082 INFO L129 PetriNetUnfolder]: 4/173 cut-off events. [2021-12-28 03:09:05,082 INFO L130 PetriNetUnfolder]: For 342/350 co-relation queries the response was YES. [2021-12-28 03:09:05,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 173 events. 4/173 cut-off events. For 342/350 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 629 event pairs, 3 based on Foata normal form. 4/173 useless extension candidates. Maximal degree in co-relation 464. Up to 32 conditions per place. [2021-12-28 03:09:05,083 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 33 selfloop transitions, 5 changer transitions 14/94 dead transitions. [2021-12-28 03:09:05,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 94 transitions, 579 flow [2021-12-28 03:09:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 584 transitions. [2021-12-28 03:09:05,085 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7209876543209877 [2021-12-28 03:09:05,085 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 584 transitions. [2021-12-28 03:09:05,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 584 transitions. [2021-12-28 03:09:05,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:05,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 584 transitions. [2021-12-28 03:09:05,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.4) internal successors, (584), 10 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,086 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,086 INFO L186 Difference]: Start difference. First operand has 130 places, 77 transitions, 380 flow. Second operand 10 states and 584 transitions. [2021-12-28 03:09:05,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 94 transitions, 579 flow [2021-12-28 03:09:05,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 94 transitions, 534 flow, removed 11 selfloop flow, removed 9 redundant places. [2021-12-28 03:09:05,089 INFO L242 Difference]: Finished difference. Result has 131 places, 74 transitions, 330 flow [2021-12-28 03:09:05,089 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=330, PETRI_PLACES=131, PETRI_TRANSITIONS=74} [2021-12-28 03:09:05,089 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 57 predicate places. [2021-12-28 03:09:05,090 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 74 transitions, 330 flow [2021-12-28 03:09:05,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,090 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:05,090 INFO L254 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] [2021-12-28 03:09:05,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-28 03:09:05,090 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1668405252, now seen corresponding path program 18 times [2021-12-28 03:09:05,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:05,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573281213] [2021-12-28 03:09:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:05,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:05,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:05,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573281213] [2021-12-28 03:09:05,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573281213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:05,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:05,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:05,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344835967] [2021-12-28 03:09:05,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:05,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:05,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:05,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:05,174 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:05,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 74 transitions, 330 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:05,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:05,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:05,304 INFO L129 PetriNetUnfolder]: 3/142 cut-off events. [2021-12-28 03:09:05,304 INFO L130 PetriNetUnfolder]: For 214/220 co-relation queries the response was YES. [2021-12-28 03:09:05,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 142 events. 3/142 cut-off events. For 214/220 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 399 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 376. Up to 27 conditions per place. [2021-12-28 03:09:05,305 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 24 selfloop transitions, 5 changer transitions 15/86 dead transitions. [2021-12-28 03:09:05,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 86 transitions, 502 flow [2021-12-28 03:09:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 576 transitions. [2021-12-28 03:09:05,306 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2021-12-28 03:09:05,306 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 576 transitions. [2021-12-28 03:09:05,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 576 transitions. [2021-12-28 03:09:05,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:05,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 576 transitions. [2021-12-28 03:09:05,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.6) internal successors, (576), 10 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,308 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,308 INFO L186 Difference]: Start difference. First operand has 131 places, 74 transitions, 330 flow. Second operand 10 states and 576 transitions. [2021-12-28 03:09:05,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 86 transitions, 502 flow [2021-12-28 03:09:05,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 86 transitions, 464 flow, removed 10 selfloop flow, removed 11 redundant places. [2021-12-28 03:09:05,311 INFO L242 Difference]: Finished difference. Result has 125 places, 69 transitions, 263 flow [2021-12-28 03:09:05,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=125, PETRI_TRANSITIONS=69} [2021-12-28 03:09:05,312 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 51 predicate places. [2021-12-28 03:09:05,312 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 69 transitions, 263 flow [2021-12-28 03:09:05,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:05,312 INFO L254 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] [2021-12-28 03:09:05,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-28 03:09:05,313 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1607529690, now seen corresponding path program 19 times [2021-12-28 03:09:05,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:05,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744066202] [2021-12-28 03:09:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:05,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:05,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:05,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744066202] [2021-12-28 03:09:05,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744066202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:05,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:05,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:05,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895424824] [2021-12-28 03:09:05,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:05,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:05,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:05,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:05,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:05,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 69 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:05,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:05,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:05,539 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-12-28 03:09:05,539 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2021-12-28 03:09:05,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 137 events. 0/137 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 362 event pairs, 0 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-12-28 03:09:05,540 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 20 selfloop transitions, 7 changer transitions 14/83 dead transitions. [2021-12-28 03:09:05,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 83 transitions, 465 flow [2021-12-28 03:09:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 574 transitions. [2021-12-28 03:09:05,541 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7086419753086419 [2021-12-28 03:09:05,541 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 574 transitions. [2021-12-28 03:09:05,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 574 transitions. [2021-12-28 03:09:05,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:05,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 574 transitions. [2021-12-28 03:09:05,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.4) internal successors, (574), 10 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,543 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,543 INFO L186 Difference]: Start difference. First operand has 125 places, 69 transitions, 263 flow. Second operand 10 states and 574 transitions. [2021-12-28 03:09:05,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 83 transitions, 465 flow [2021-12-28 03:09:05,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 83 transitions, 388 flow, removed 9 selfloop flow, removed 16 redundant places. [2021-12-28 03:09:05,545 INFO L242 Difference]: Finished difference. Result has 113 places, 69 transitions, 244 flow [2021-12-28 03:09:05,545 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=244, PETRI_PLACES=113, PETRI_TRANSITIONS=69} [2021-12-28 03:09:05,545 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2021-12-28 03:09:05,545 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 69 transitions, 244 flow [2021-12-28 03:09:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:05,546 INFO L254 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] [2021-12-28 03:09:05,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-28 03:09:05,546 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1409584476, now seen corresponding path program 20 times [2021-12-28 03:09:05,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:05,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632755076] [2021-12-28 03:09:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:05,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:05,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:05,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632755076] [2021-12-28 03:09:05,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632755076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:05,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:05,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 03:09:05,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373645491] [2021-12-28 03:09:05,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:05,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 03:09:05,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 03:09:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:09:05,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-28 03:09:05,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 69 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:05,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-28 03:09:05,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:05,727 INFO L129 PetriNetUnfolder]: 0/99 cut-off events. [2021-12-28 03:09:05,727 INFO L130 PetriNetUnfolder]: For 73/75 co-relation queries the response was YES. [2021-12-28 03:09:05,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 99 events. 0/99 cut-off events. For 73/75 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 163 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-12-28 03:09:05,728 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 0 selfloop transitions, 0 changer transitions 71/71 dead transitions. [2021-12-28 03:09:05,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 71 transitions, 348 flow [2021-12-28 03:09:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:09:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 03:09:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 566 transitions. [2021-12-28 03:09:05,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6987654320987654 [2021-12-28 03:09:05,729 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 566 transitions. [2021-12-28 03:09:05,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 566 transitions. [2021-12-28 03:09:05,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:05,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 566 transitions. [2021-12-28 03:09:05,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,730 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,730 INFO L186 Difference]: Start difference. First operand has 113 places, 69 transitions, 244 flow. Second operand 10 states and 566 transitions. [2021-12-28 03:09:05,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 71 transitions, 348 flow [2021-12-28 03:09:05,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 71 transitions, 314 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-28 03:09:05,732 INFO L242 Difference]: Finished difference. Result has 107 places, 0 transitions, 0 flow [2021-12-28 03:09:05,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=107, PETRI_TRANSITIONS=0} [2021-12-28 03:09:05,732 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 33 predicate places. [2021-12-28 03:09:05,732 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 0 transitions, 0 flow [2021-12-28 03:09:05,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:05,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-28 03:09:05,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-28 03:09:05,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-28 03:09:05,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-28 03:09:05,737 INFO L732 BasicCegarLoop]: Path program histogram: [20, 10, 5, 3] [2021-12-28 03:09:05,738 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-28 03:09:05,739 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 03:09:05,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 03:09:05 BasicIcfg [2021-12-28 03:09:05,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 03:09:05,741 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 03:09:05,741 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 03:09:05,741 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 03:09:05,741 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:08:54" (3/4) ... [2021-12-28 03:09:05,743 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-28 03:09:05,746 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-28 03:09:05,747 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-28 03:09:05,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-12-28 03:09:05,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-28 03:09:05,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-28 03:09:05,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-28 03:09:05,766 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-28 03:09:05,766 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 03:09:05,766 INFO L158 Benchmark]: Toolchain (without parser) took 11402.79ms. Allocated memory was 65.0MB in the beginning and 232.8MB in the end (delta: 167.8MB). Free memory was 46.0MB in the beginning and 150.8MB in the end (delta: -104.8MB). Peak memory consumption was 63.4MB. Max. memory is 16.1GB. [2021-12-28 03:09:05,767 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 65.0MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 03:09:05,767 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.63ms. Allocated memory is still 65.0MB. Free memory was 45.8MB in the beginning and 48.8MB in the end (delta: -3.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-28 03:09:05,767 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.99ms. Allocated memory is still 65.0MB. Free memory was 48.8MB in the beginning and 47.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 03:09:05,767 INFO L158 Benchmark]: Boogie Preprocessor took 39.75ms. Allocated memory is still 65.0MB. Free memory was 47.2MB in the beginning and 46.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 03:09:05,767 INFO L158 Benchmark]: RCFGBuilder took 271.99ms. Allocated memory is still 65.0MB. Free memory was 46.0MB in the beginning and 35.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-28 03:09:05,767 INFO L158 Benchmark]: TraceAbstraction took 10806.46ms. Allocated memory was 65.0MB in the beginning and 232.8MB in the end (delta: 167.8MB). Free memory was 34.9MB in the beginning and 152.9MB in the end (delta: -118.0MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. [2021-12-28 03:09:05,767 INFO L158 Benchmark]: Witness Printer took 25.49ms. Allocated memory is still 232.8MB. Free memory was 152.9MB in the beginning and 150.8MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 03:09:05,768 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 65.0MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.63ms. Allocated memory is still 65.0MB. Free memory was 45.8MB in the beginning and 48.8MB in the end (delta: -3.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.99ms. Allocated memory is still 65.0MB. Free memory was 48.8MB in the beginning and 47.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.75ms. Allocated memory is still 65.0MB. Free memory was 47.2MB in the beginning and 46.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 271.99ms. Allocated memory is still 65.0MB. Free memory was 46.0MB in the beginning and 35.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10806.46ms. Allocated memory was 65.0MB in the beginning and 232.8MB in the end (delta: 167.8MB). Free memory was 34.9MB in the beginning and 152.9MB in the end (delta: -118.0MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. * Witness Printer took 25.49ms. Allocated memory is still 232.8MB. Free memory was 152.9MB in the beginning and 150.8MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 101 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.7s, OverallIterations: 38, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1856 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1856 mSDsluCounter, 4618 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5342 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4719 IncrementalHoareTripleChecker+Invalid, 4734 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 852 mSDtfsCounter, 4719 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 599 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=675occurred in iteration=23, InterpolantAutomatonStates: 375, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 2356 NumberOfCodeBlocks, 2356 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2318 ConstructedInterpolants, 0 QuantifiedInterpolants, 15060 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 38 InterpolantComputations, 38 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-28 03:09:05,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE