./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:48:01,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:48:01,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:48:01,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:48:01,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:48:01,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:48:01,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:48:01,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:48:01,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:48:01,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:48:01,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:48:01,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:48:01,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:48:01,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:48:01,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:48:01,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:48:01,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:48:01,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:48:01,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:48:01,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:48:01,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:48:01,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:48:01,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:48:01,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:48:01,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:48:01,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:48:01,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:48:01,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:48:01,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:48:01,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:48:01,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:48:01,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:48:01,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:48:01,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:48:01,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:48:01,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:48:01,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:48:01,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:48:01,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:48:01,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:48:01,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:48:01,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:48:01,640 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:48:01,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:48:01,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:48:01,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:48:01,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:48:01,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:48:01,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:48:01,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:48:01,643 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:48:01,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:48:01,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:48:01,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:48:01,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:48:01,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:48:01,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:48:01,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:48:01,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:48:01,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:48:01,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:48:01,645 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:48:01,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:48:01,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:48:01,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:48:01,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:48:01,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:48:01,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:48:01,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:48:01,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:48:01,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:48:01,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:48:01,648 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:48:01,648 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:48:01,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:48:01,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:48:01,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2021-12-22 13:48:01,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:48:01,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:48:01,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:48:01,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:48:01,908 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:48:01,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2021-12-22 13:48:01,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11586df4/70262ddc595544f1a375814aa0aacdae/FLAGc10cc466f [2021-12-22 13:48:02,305 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:48:02,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2021-12-22 13:48:02,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11586df4/70262ddc595544f1a375814aa0aacdae/FLAGc10cc466f [2021-12-22 13:48:02,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11586df4/70262ddc595544f1a375814aa0aacdae [2021-12-22 13:48:02,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:48:02,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:48:02,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:48:02,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:48:02,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:48:02,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76de005a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02, skipping insertion in model container [2021-12-22 13:48:02,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:48:02,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:48:02,526 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2021-12-22 13:48:02,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:48:02,539 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:48:02,559 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2021-12-22 13:48:02,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:48:02,573 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:48:02,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02 WrapperNode [2021-12-22 13:48:02,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:48:02,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:48:02,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:48:02,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:48:02,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,610 INFO L137 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2021-12-22 13:48:02,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:48:02,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:48:02,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:48:02,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:48:02,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:48:02,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:48:02,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:48:02,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:48:02,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (1/1) ... [2021-12-22 13:48:02,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:48:02,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:48:02,672 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) [2021-12-22 13:48:02,690 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 [2021-12-22 13:48:02,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:48:02,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:48:02,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:48:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:48:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:48:02,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:48:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:48:02,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:48:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-22 13:48:02,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-22 13:48:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:48:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:48:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:48:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:48:02,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:48:02,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:48:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:48:02,711 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:48:02,817 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:48:02,819 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:48:03,139 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:48:03,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:48:03,256 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 13:48:03,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:48:03 BoogieIcfgContainer [2021-12-22 13:48:03,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:48:03,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:48:03,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:48:03,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:48:03,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:48:02" (1/3) ... [2021-12-22 13:48:03,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d2677c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:48:03, skipping insertion in model container [2021-12-22 13:48:03,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:02" (2/3) ... [2021-12-22 13:48:03,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d2677c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:48:03, skipping insertion in model container [2021-12-22 13:48:03,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:48:03" (3/3) ... [2021-12-22 13:48:03,266 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2021-12-22 13:48:03,270 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:48:03,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:48:03,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:48:03,271 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:48:03,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,324 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,325 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,328 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,328 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,328 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,328 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,328 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,329 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,329 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,329 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,329 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,330 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,330 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,330 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,330 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,331 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,331 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,331 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,341 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,341 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,341 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,342 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,342 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,342 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,343 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,343 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,344 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,344 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,347 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,347 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,347 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,348 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,348 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,348 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,349 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,349 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,350 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,355 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,355 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,355 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,360 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,364 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,366 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,366 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,366 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,366 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,366 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,366 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,367 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:48:03,369 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-22 13:48:03,421 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:48:03,426 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 [2021-12-22 13:48:03,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 13:48:03,437 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 215 places, 223 transitions, 470 flow [2021-12-22 13:48:03,528 INFO L129 PetriNetUnfolder]: 18/220 cut-off events. [2021-12-22 13:48:03,528 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:48:03,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 220 events. 18/220 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 125 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 180. Up to 3 conditions per place. [2021-12-22 13:48:03,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 223 transitions, 470 flow [2021-12-22 13:48:03,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 209 transitions, 436 flow [2021-12-22 13:48:03,593 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2021-12-22 13:48:03,593 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:48:03,593 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:03,594 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:03,594 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:03,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1261378579, now seen corresponding path program 1 times [2021-12-22 13:48:03,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:03,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766434756] [2021-12-22 13:48:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:03,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:03,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:03,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766434756] [2021-12-22 13:48:03,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766434756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:03,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:03,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:48:03,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790477121] [2021-12-22 13:48:03,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:03,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:48:03,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:48:03,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:48:03,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 223 [2021-12-22 13:48:03,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 209 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 203.5) internal successors, (407), 2 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:03,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:03,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 223 [2021-12-22 13:48:03,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:04,020 INFO L129 PetriNetUnfolder]: 71/400 cut-off events. [2021-12-22 13:48:04,021 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-12-22 13:48:04,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 400 events. 71/400 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1176 event pairs, 38 based on Foata normal form. 60/419 useless extension candidates. Maximal degree in co-relation 353. Up to 106 conditions per place. [2021-12-22 13:48:04,028 INFO L132 encePairwiseOnDemand]: 210/223 looper letters, 11 selfloop transitions, 0 changer transitions 6/196 dead transitions. [2021-12-22 13:48:04,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 432 flow [2021-12-22 13:48:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:48:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:48:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 420 transitions. [2021-12-22 13:48:04,056 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9417040358744395 [2021-12-22 13:48:04,057 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 420 transitions. [2021-12-22 13:48:04,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 420 transitions. [2021-12-22 13:48:04,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:04,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 420 transitions. [2021-12-22 13:48:04,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 210.0) internal successors, (420), 2 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,074 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,076 INFO L186 Difference]: Start difference. First operand has 201 places, 209 transitions, 436 flow. Second operand 2 states and 420 transitions. [2021-12-22 13:48:04,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 432 flow [2021-12-22 13:48:04,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 196 transitions, 420 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-22 13:48:04,084 INFO L242 Difference]: Finished difference. Result has 196 places, 190 transitions, 386 flow [2021-12-22 13:48:04,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=386, PETRI_PLACES=196, PETRI_TRANSITIONS=190} [2021-12-22 13:48:04,092 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -5 predicate places. [2021-12-22 13:48:04,092 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 190 transitions, 386 flow [2021-12-22 13:48:04,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 203.5) internal successors, (407), 2 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,093 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:04,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:04,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:48:04,094 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash -319257289, now seen corresponding path program 1 times [2021-12-22 13:48:04,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:04,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499596263] [2021-12-22 13:48:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:04,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:48:04,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:04,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499596263] [2021-12-22 13:48:04,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499596263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:04,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:04,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:48:04,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563545461] [2021-12-22 13:48:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:04,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:48:04,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:48:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:48:04,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 223 [2021-12-22 13:48:04,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 190 transitions, 386 flow. Second operand has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:04,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 223 [2021-12-22 13:48:04,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:04,548 INFO L129 PetriNetUnfolder]: 73/481 cut-off events. [2021-12-22 13:48:04,548 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-12-22 13:48:04,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 481 events. 73/481 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1445 event pairs, 38 based on Foata normal form. 11/453 useless extension candidates. Maximal degree in co-relation 649. Up to 118 conditions per place. [2021-12-22 13:48:04,551 INFO L132 encePairwiseOnDemand]: 211/223 looper letters, 33 selfloop transitions, 8 changer transitions 17/211 dead transitions. [2021-12-22 13:48:04,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 211 transitions, 547 flow [2021-12-22 13:48:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:48:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:48:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1609 transitions. [2021-12-22 13:48:04,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8016940707523668 [2021-12-22 13:48:04,557 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1609 transitions. [2021-12-22 13:48:04,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1609 transitions. [2021-12-22 13:48:04,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:04,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1609 transitions. [2021-12-22 13:48:04,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.77777777777777) internal successors, (1609), 9 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 223.0) internal successors, (2230), 10 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,567 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 223.0) internal successors, (2230), 10 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,567 INFO L186 Difference]: Start difference. First operand has 196 places, 190 transitions, 386 flow. Second operand 9 states and 1609 transitions. [2021-12-22 13:48:04,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 211 transitions, 547 flow [2021-12-22 13:48:04,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 211 transitions, 547 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:48:04,576 INFO L242 Difference]: Finished difference. Result has 200 places, 191 transitions, 418 flow [2021-12-22 13:48:04,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=418, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2021-12-22 13:48:04,577 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -1 predicate places. [2021-12-22 13:48:04,577 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 418 flow [2021-12-22 13:48:04,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.66666666666666) internal successors, (1060), 6 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:04,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:04,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:48:04,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1559305920, now seen corresponding path program 1 times [2021-12-22 13:48:04,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:04,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212143628] [2021-12-22 13:48:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:04,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:48:04,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212143628] [2021-12-22 13:48:04,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212143628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:04,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:04,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:48:04,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979367936] [2021-12-22 13:48:04,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:04,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:48:04,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:48:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:48:04,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 223 [2021-12-22 13:48:04,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 418 flow. Second operand has 6 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:04,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 223 [2021-12-22 13:48:04,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:04,913 INFO L129 PetriNetUnfolder]: 92/516 cut-off events. [2021-12-22 13:48:04,913 INFO L130 PetriNetUnfolder]: For 87/111 co-relation queries the response was YES. [2021-12-22 13:48:04,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 516 events. 92/516 cut-off events. For 87/111 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1770 event pairs, 50 based on Foata normal form. 13/481 useless extension candidates. Maximal degree in co-relation 812. Up to 115 conditions per place. [2021-12-22 13:48:04,917 INFO L132 encePairwiseOnDemand]: 214/223 looper letters, 36 selfloop transitions, 6 changer transitions 8/203 dead transitions. [2021-12-22 13:48:04,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 203 transitions, 552 flow [2021-12-22 13:48:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:48:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:48:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1255 transitions. [2021-12-22 13:48:04,921 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8039718129404229 [2021-12-22 13:48:04,921 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1255 transitions. [2021-12-22 13:48:04,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1255 transitions. [2021-12-22 13:48:04,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:04,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1255 transitions. [2021-12-22 13:48:04,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 223.0) internal successors, (1784), 8 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,929 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 223.0) internal successors, (1784), 8 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,930 INFO L186 Difference]: Start difference. First operand has 200 places, 191 transitions, 418 flow. Second operand 7 states and 1255 transitions. [2021-12-22 13:48:04,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 203 transitions, 552 flow [2021-12-22 13:48:04,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 203 transitions, 538 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-22 13:48:04,936 INFO L242 Difference]: Finished difference. Result has 201 places, 192 transitions, 428 flow [2021-12-22 13:48:04,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=201, PETRI_TRANSITIONS=192} [2021-12-22 13:48:04,939 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 0 predicate places. [2021-12-22 13:48:04,939 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 192 transitions, 428 flow [2021-12-22 13:48:04,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:04,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:04,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:04,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:48:04,941 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -420338195, now seen corresponding path program 1 times [2021-12-22 13:48:04,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:04,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305213254] [2021-12-22 13:48:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:04,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:05,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305213254] [2021-12-22 13:48:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305213254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:05,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:05,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:48:05,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835927246] [2021-12-22 13:48:05,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:05,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:48:05,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:48:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:48:05,104 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 223 [2021-12-22 13:48:05,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 192 transitions, 428 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:05,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 223 [2021-12-22 13:48:05,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:05,174 INFO L129 PetriNetUnfolder]: 79/421 cut-off events. [2021-12-22 13:48:05,175 INFO L130 PetriNetUnfolder]: For 84/94 co-relation queries the response was YES. [2021-12-22 13:48:05,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 421 events. 79/421 cut-off events. For 84/94 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1216 event pairs, 23 based on Foata normal form. 6/405 useless extension candidates. Maximal degree in co-relation 654. Up to 79 conditions per place. [2021-12-22 13:48:05,179 INFO L132 encePairwiseOnDemand]: 220/223 looper letters, 19 selfloop transitions, 2 changer transitions 0/198 dead transitions. [2021-12-22 13:48:05,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 198 transitions, 492 flow [2021-12-22 13:48:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:48:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:48:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2021-12-22 13:48:05,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9028400597907325 [2021-12-22 13:48:05,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2021-12-22 13:48:05,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2021-12-22 13:48:05,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:05,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2021-12-22 13:48:05,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,187 INFO L186 Difference]: Start difference. First operand has 201 places, 192 transitions, 428 flow. Second operand 3 states and 604 transitions. [2021-12-22 13:48:05,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 198 transitions, 492 flow [2021-12-22 13:48:05,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 198 transitions, 482 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:48:05,191 INFO L242 Difference]: Finished difference. Result has 199 places, 193 transitions, 432 flow [2021-12-22 13:48:05,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=199, PETRI_TRANSITIONS=193} [2021-12-22 13:48:05,192 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -2 predicate places. [2021-12-22 13:48:05,193 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 193 transitions, 432 flow [2021-12-22 13:48:05,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,193 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:05,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:05,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:48:05,194 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:05,195 INFO L85 PathProgramCache]: Analyzing trace with hash -46819677, now seen corresponding path program 2 times [2021-12-22 13:48:05,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:05,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444961660] [2021-12-22 13:48:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:05,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:05,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:05,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444961660] [2021-12-22 13:48:05,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444961660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:05,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:05,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:48:05,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349434026] [2021-12-22 13:48:05,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:05,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:48:05,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:05,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:48:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:48:05,363 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 223 [2021-12-22 13:48:05,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 193 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 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) [2021-12-22 13:48:05,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:05,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 223 [2021-12-22 13:48:05,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:05,426 INFO L129 PetriNetUnfolder]: 58/373 cut-off events. [2021-12-22 13:48:05,426 INFO L130 PetriNetUnfolder]: For 90/104 co-relation queries the response was YES. [2021-12-22 13:48:05,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 373 events. 58/373 cut-off events. For 90/104 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 885 event pairs, 9 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 593. Up to 91 conditions per place. [2021-12-22 13:48:05,429 INFO L132 encePairwiseOnDemand]: 217/223 looper letters, 18 selfloop transitions, 5 changer transitions 0/197 dead transitions. [2021-12-22 13:48:05,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 197 transitions, 492 flow [2021-12-22 13:48:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:48:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:48:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2021-12-22 13:48:05,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.890881913303438 [2021-12-22 13:48:05,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2021-12-22 13:48:05,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2021-12-22 13:48:05,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:05,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2021-12-22 13:48:05,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:05,435 INFO L186 Difference]: Start difference. First operand has 199 places, 193 transitions, 432 flow. Second operand 3 states and 596 transitions. [2021-12-22 13:48:05,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 197 transitions, 492 flow [2021-12-22 13:48:05,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 197 transitions, 484 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-22 13:48:05,440 INFO L242 Difference]: Finished difference. Result has 200 places, 195 transitions, 453 flow [2021-12-22 13:48:05,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=453, PETRI_PLACES=200, PETRI_TRANSITIONS=195} [2021-12-22 13:48:05,449 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, -1 predicate places. [2021-12-22 13:48:05,449 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 195 transitions, 453 flow [2021-12-22 13:48:05,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 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) [2021-12-22 13:48:05,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:05,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:05,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:48:05,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1995193659, now seen corresponding path program 3 times [2021-12-22 13:48:05,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:05,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235552763] [2021-12-22 13:48:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:05,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:06,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:06,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235552763] [2021-12-22 13:48:06,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235552763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:06,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:06,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:06,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886087385] [2021-12-22 13:48:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:06,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:06,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:06,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:06,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:06,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:06,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 195 transitions, 453 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:06,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:06,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:06,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:07,240 INFO L129 PetriNetUnfolder]: 840/1884 cut-off events. [2021-12-22 13:48:07,240 INFO L130 PetriNetUnfolder]: For 805/827 co-relation queries the response was YES. [2021-12-22 13:48:07,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3983 conditions, 1884 events. 840/1884 cut-off events. For 805/827 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11468 event pairs, 431 based on Foata normal form. 1/1729 useless extension candidates. Maximal degree in co-relation 3974. Up to 983 conditions per place. [2021-12-22 13:48:07,254 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 114 selfloop transitions, 41 changer transitions 5/295 dead transitions. [2021-12-22 13:48:07,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 295 transitions, 1082 flow [2021-12-22 13:48:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:48:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:48:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2934 transitions. [2021-12-22 13:48:07,261 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6924710880339863 [2021-12-22 13:48:07,261 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2934 transitions. [2021-12-22 13:48:07,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2934 transitions. [2021-12-22 13:48:07,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:07,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2934 transitions. [2021-12-22 13:48:07,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.42105263157896) internal successors, (2934), 19 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:07,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:07,276 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:07,277 INFO L186 Difference]: Start difference. First operand has 200 places, 195 transitions, 453 flow. Second operand 19 states and 2934 transitions. [2021-12-22 13:48:07,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 295 transitions, 1082 flow [2021-12-22 13:48:07,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 295 transitions, 1047 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-22 13:48:07,284 INFO L242 Difference]: Finished difference. Result has 226 places, 233 transitions, 670 flow [2021-12-22 13:48:07,284 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=670, PETRI_PLACES=226, PETRI_TRANSITIONS=233} [2021-12-22 13:48:07,285 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 25 predicate places. [2021-12-22 13:48:07,285 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 233 transitions, 670 flow [2021-12-22 13:48:07,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:07,286 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:07,286 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:48:07,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 717178791, now seen corresponding path program 4 times [2021-12-22 13:48:07,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:07,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368817945] [2021-12-22 13:48:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:07,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:08,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368817945] [2021-12-22 13:48:08,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368817945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:08,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:08,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:08,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437836428] [2021-12-22 13:48:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:08,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:08,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:08,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:08,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 233 transitions, 670 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:08,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:08,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:08,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:09,131 INFO L129 PetriNetUnfolder]: 993/2376 cut-off events. [2021-12-22 13:48:09,131 INFO L130 PetriNetUnfolder]: For 1339/1361 co-relation queries the response was YES. [2021-12-22 13:48:09,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5555 conditions, 2376 events. 993/2376 cut-off events. For 1339/1361 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16615 event pairs, 233 based on Foata normal form. 14/2302 useless extension candidates. Maximal degree in co-relation 5537. Up to 1050 conditions per place. [2021-12-22 13:48:09,150 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 135 selfloop transitions, 56 changer transitions 5/331 dead transitions. [2021-12-22 13:48:09,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 331 transitions, 1466 flow [2021-12-22 13:48:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3091 transitions. [2021-12-22 13:48:09,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6930493273542601 [2021-12-22 13:48:09,157 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3091 transitions. [2021-12-22 13:48:09,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3091 transitions. [2021-12-22 13:48:09,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:09,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3091 transitions. [2021-12-22 13:48:09,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.55) internal successors, (3091), 20 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:09,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:09,173 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:09,173 INFO L186 Difference]: Start difference. First operand has 226 places, 233 transitions, 670 flow. Second operand 20 states and 3091 transitions. [2021-12-22 13:48:09,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 331 transitions, 1466 flow [2021-12-22 13:48:09,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 331 transitions, 1446 flow, removed 6 selfloop flow, removed 6 redundant places. [2021-12-22 13:48:09,188 INFO L242 Difference]: Finished difference. Result has 248 places, 257 transitions, 973 flow [2021-12-22 13:48:09,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=973, PETRI_PLACES=248, PETRI_TRANSITIONS=257} [2021-12-22 13:48:09,189 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 47 predicate places. [2021-12-22 13:48:09,189 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 257 transitions, 973 flow [2021-12-22 13:48:09,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:09,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:09,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:09,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:48:09,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2083915083, now seen corresponding path program 5 times [2021-12-22 13:48:09,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:09,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908986254] [2021-12-22 13:48:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:09,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:09,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908986254] [2021-12-22 13:48:09,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908986254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:09,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:09,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:09,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508649584] [2021-12-22 13:48:09,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:09,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:09,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:09,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:09,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 257 transitions, 973 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:09,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:09,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:09,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:10,841 INFO L129 PetriNetUnfolder]: 1064/2559 cut-off events. [2021-12-22 13:48:10,842 INFO L130 PetriNetUnfolder]: For 3196/3216 co-relation queries the response was YES. [2021-12-22 13:48:10,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6898 conditions, 2559 events. 1064/2559 cut-off events. For 3196/3216 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18372 event pairs, 377 based on Foata normal form. 9/2456 useless extension candidates. Maximal degree in co-relation 6871. Up to 1376 conditions per place. [2021-12-22 13:48:10,866 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 132 selfloop transitions, 55 changer transitions 5/327 dead transitions. [2021-12-22 13:48:10,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 327 transitions, 1718 flow [2021-12-22 13:48:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2780 transitions. [2021-12-22 13:48:10,873 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6925759840558047 [2021-12-22 13:48:10,873 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2780 transitions. [2021-12-22 13:48:10,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2780 transitions. [2021-12-22 13:48:10,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:10,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2780 transitions. [2021-12-22 13:48:10,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.44444444444446) internal successors, (2780), 18 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:10,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:10,888 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:10,888 INFO L186 Difference]: Start difference. First operand has 248 places, 257 transitions, 973 flow. Second operand 18 states and 2780 transitions. [2021-12-22 13:48:10,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 327 transitions, 1718 flow [2021-12-22 13:48:10,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 327 transitions, 1639 flow, removed 23 selfloop flow, removed 8 redundant places. [2021-12-22 13:48:10,913 INFO L242 Difference]: Finished difference. Result has 263 places, 274 transitions, 1215 flow [2021-12-22 13:48:10,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1215, PETRI_PLACES=263, PETRI_TRANSITIONS=274} [2021-12-22 13:48:10,915 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 62 predicate places. [2021-12-22 13:48:10,915 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 274 transitions, 1215 flow [2021-12-22 13:48:10,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:10,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:10,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:10,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:48:10,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2087498249, now seen corresponding path program 6 times [2021-12-22 13:48:10,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:10,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463710773] [2021-12-22 13:48:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:10,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:11,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:11,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463710773] [2021-12-22 13:48:11,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463710773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:11,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:11,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:11,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311046036] [2021-12-22 13:48:11,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:11,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:11,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:11,670 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:11,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 274 transitions, 1215 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:11,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:11,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:11,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:12,690 INFO L129 PetriNetUnfolder]: 1112/2639 cut-off events. [2021-12-22 13:48:12,690 INFO L130 PetriNetUnfolder]: For 4968/4983 co-relation queries the response was YES. [2021-12-22 13:48:12,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7810 conditions, 2639 events. 1112/2639 cut-off events. For 4968/4983 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18906 event pairs, 475 based on Foata normal form. 7/2549 useless extension candidates. Maximal degree in co-relation 7776. Up to 1392 conditions per place. [2021-12-22 13:48:12,719 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 154 selfloop transitions, 58 changer transitions 5/352 dead transitions. [2021-12-22 13:48:12,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 352 transitions, 2093 flow [2021-12-22 13:48:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3086 transitions. [2021-12-22 13:48:12,726 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6919282511210763 [2021-12-22 13:48:12,726 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3086 transitions. [2021-12-22 13:48:12,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3086 transitions. [2021-12-22 13:48:12,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:12,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3086 transitions. [2021-12-22 13:48:12,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.3) internal successors, (3086), 20 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:12,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:12,740 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:12,740 INFO L186 Difference]: Start difference. First operand has 263 places, 274 transitions, 1215 flow. Second operand 20 states and 3086 transitions. [2021-12-22 13:48:12,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 352 transitions, 2093 flow [2021-12-22 13:48:12,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 352 transitions, 2000 flow, removed 30 selfloop flow, removed 8 redundant places. [2021-12-22 13:48:12,765 INFO L242 Difference]: Finished difference. Result has 279 places, 285 transitions, 1393 flow [2021-12-22 13:48:12,765 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1393, PETRI_PLACES=279, PETRI_TRANSITIONS=285} [2021-12-22 13:48:12,766 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 78 predicate places. [2021-12-22 13:48:12,766 INFO L470 AbstractCegarLoop]: Abstraction has has 279 places, 285 transitions, 1393 flow [2021-12-22 13:48:12,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:12,767 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:12,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:12,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:48:12,768 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash -902654655, now seen corresponding path program 7 times [2021-12-22 13:48:12,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:12,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214650238] [2021-12-22 13:48:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:12,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:13,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:13,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214650238] [2021-12-22 13:48:13,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214650238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:13,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:13,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:13,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081140936] [2021-12-22 13:48:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:13,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:13,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:13,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:13,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 285 transitions, 1393 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:13,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:13,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:13,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:14,576 INFO L129 PetriNetUnfolder]: 1162/2825 cut-off events. [2021-12-22 13:48:14,577 INFO L130 PetriNetUnfolder]: For 7520/7534 co-relation queries the response was YES. [2021-12-22 13:48:14,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8738 conditions, 2825 events. 1162/2825 cut-off events. For 7520/7534 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21081 event pairs, 366 based on Foata normal form. 5/2710 useless extension candidates. Maximal degree in co-relation 8698. Up to 1457 conditions per place. [2021-12-22 13:48:14,607 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 160 selfloop transitions, 60 changer transitions 5/360 dead transitions. [2021-12-22 13:48:14,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 360 transitions, 2312 flow [2021-12-22 13:48:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3086 transitions. [2021-12-22 13:48:14,614 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6919282511210763 [2021-12-22 13:48:14,614 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3086 transitions. [2021-12-22 13:48:14,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3086 transitions. [2021-12-22 13:48:14,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:14,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3086 transitions. [2021-12-22 13:48:14,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.3) internal successors, (3086), 20 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:14,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:14,627 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:14,627 INFO L186 Difference]: Start difference. First operand has 279 places, 285 transitions, 1393 flow. Second operand 20 states and 3086 transitions. [2021-12-22 13:48:14,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 360 transitions, 2312 flow [2021-12-22 13:48:14,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 360 transitions, 2160 flow, removed 34 selfloop flow, removed 13 redundant places. [2021-12-22 13:48:14,657 INFO L242 Difference]: Finished difference. Result has 289 places, 293 transitions, 1478 flow [2021-12-22 13:48:14,658 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1478, PETRI_PLACES=289, PETRI_TRANSITIONS=293} [2021-12-22 13:48:14,658 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 88 predicate places. [2021-12-22 13:48:14,658 INFO L470 AbstractCegarLoop]: Abstraction has has 289 places, 293 transitions, 1478 flow [2021-12-22 13:48:14,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:14,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:14,660 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:14,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:48:14,660 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1383550215, now seen corresponding path program 8 times [2021-12-22 13:48:14,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811685068] [2021-12-22 13:48:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:14,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:15,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811685068] [2021-12-22 13:48:15,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811685068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:15,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:15,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:15,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654861657] [2021-12-22 13:48:15,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:15,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:15,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:15,371 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:15,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 293 transitions, 1478 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:15,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:15,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:15,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:16,397 INFO L129 PetriNetUnfolder]: 1212/2986 cut-off events. [2021-12-22 13:48:16,397 INFO L130 PetriNetUnfolder]: For 9360/9382 co-relation queries the response was YES. [2021-12-22 13:48:16,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9528 conditions, 2986 events. 1212/2986 cut-off events. For 9360/9382 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22856 event pairs, 325 based on Foata normal form. 14/2881 useless extension candidates. Maximal degree in co-relation 9483. Up to 1555 conditions per place. [2021-12-22 13:48:16,429 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 164 selfloop transitions, 61 changer transitions 5/365 dead transitions. [2021-12-22 13:48:16,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 365 transitions, 2439 flow [2021-12-22 13:48:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3084 transitions. [2021-12-22 13:48:16,434 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6914798206278027 [2021-12-22 13:48:16,434 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3084 transitions. [2021-12-22 13:48:16,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3084 transitions. [2021-12-22 13:48:16,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:16,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3084 transitions. [2021-12-22 13:48:16,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.2) internal successors, (3084), 20 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:16,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:16,446 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:16,446 INFO L186 Difference]: Start difference. First operand has 289 places, 293 transitions, 1478 flow. Second operand 20 states and 3084 transitions. [2021-12-22 13:48:16,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 365 transitions, 2439 flow [2021-12-22 13:48:16,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 365 transitions, 2279 flow, removed 36 selfloop flow, removed 14 redundant places. [2021-12-22 13:48:16,481 INFO L242 Difference]: Finished difference. Result has 297 places, 302 transitions, 1601 flow [2021-12-22 13:48:16,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1601, PETRI_PLACES=297, PETRI_TRANSITIONS=302} [2021-12-22 13:48:16,482 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 96 predicate places. [2021-12-22 13:48:16,482 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 302 transitions, 1601 flow [2021-12-22 13:48:16,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:16,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:16,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:16,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:48:16,483 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash -576522603, now seen corresponding path program 9 times [2021-12-22 13:48:16,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430983012] [2021-12-22 13:48:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:16,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:17,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430983012] [2021-12-22 13:48:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430983012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:17,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:17,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:17,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457598033] [2021-12-22 13:48:17,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:17,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:17,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:17,064 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:17,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 302 transitions, 1601 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:17,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:17,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:17,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:17,962 INFO L129 PetriNetUnfolder]: 1227/2943 cut-off events. [2021-12-22 13:48:17,962 INFO L130 PetriNetUnfolder]: For 10632/10648 co-relation queries the response was YES. [2021-12-22 13:48:17,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9858 conditions, 2943 events. 1227/2943 cut-off events. For 10632/10648 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22044 event pairs, 520 based on Foata normal form. 8/2838 useless extension candidates. Maximal degree in co-relation 9809. Up to 1641 conditions per place. [2021-12-22 13:48:17,995 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 167 selfloop transitions, 59 changer transitions 5/366 dead transitions. [2021-12-22 13:48:17,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 366 transitions, 2515 flow [2021-12-22 13:48:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:48:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:48:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2926 transitions. [2021-12-22 13:48:17,999 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6905829596412556 [2021-12-22 13:48:17,999 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2926 transitions. [2021-12-22 13:48:17,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2926 transitions. [2021-12-22 13:48:18,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:18,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2926 transitions. [2021-12-22 13:48:18,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.0) internal successors, (2926), 19 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:18,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:18,009 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:18,009 INFO L186 Difference]: Start difference. First operand has 297 places, 302 transitions, 1601 flow. Second operand 19 states and 2926 transitions. [2021-12-22 13:48:18,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 366 transitions, 2515 flow [2021-12-22 13:48:18,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 366 transitions, 2345 flow, removed 40 selfloop flow, removed 15 redundant places. [2021-12-22 13:48:18,051 INFO L242 Difference]: Finished difference. Result has 302 places, 309 transitions, 1634 flow [2021-12-22 13:48:18,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1634, PETRI_PLACES=302, PETRI_TRANSITIONS=309} [2021-12-22 13:48:18,052 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 101 predicate places. [2021-12-22 13:48:18,052 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 309 transitions, 1634 flow [2021-12-22 13:48:18,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:18,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:18,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:18,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:48:18,053 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -606615727, now seen corresponding path program 10 times [2021-12-22 13:48:18,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:18,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855187165] [2021-12-22 13:48:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:18,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:18,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855187165] [2021-12-22 13:48:18,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855187165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:18,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:18,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:18,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068534437] [2021-12-22 13:48:18,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:18,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:18,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:18,801 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:18,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 309 transitions, 1634 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:18,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:18,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:18,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:19,856 INFO L129 PetriNetUnfolder]: 1376/3356 cut-off events. [2021-12-22 13:48:19,856 INFO L130 PetriNetUnfolder]: For 12903/12911 co-relation queries the response was YES. [2021-12-22 13:48:19,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11340 conditions, 3356 events. 1376/3356 cut-off events. For 12903/12911 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26522 event pairs, 556 based on Foata normal form. 5/3218 useless extension candidates. Maximal degree in co-relation 11288. Up to 1798 conditions per place. [2021-12-22 13:48:19,893 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 197 selfloop transitions, 56 changer transitions 5/393 dead transitions. [2021-12-22 13:48:19,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 393 transitions, 2797 flow [2021-12-22 13:48:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3090 transitions. [2021-12-22 13:48:19,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6928251121076233 [2021-12-22 13:48:19,897 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3090 transitions. [2021-12-22 13:48:19,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3090 transitions. [2021-12-22 13:48:19,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:19,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3090 transitions. [2021-12-22 13:48:19,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.5) internal successors, (3090), 20 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:19,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:19,907 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:19,907 INFO L186 Difference]: Start difference. First operand has 302 places, 309 transitions, 1634 flow. Second operand 20 states and 3090 transitions. [2021-12-22 13:48:19,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 393 transitions, 2797 flow [2021-12-22 13:48:19,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 393 transitions, 2697 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-22 13:48:19,950 INFO L242 Difference]: Finished difference. Result has 315 places, 323 transitions, 1879 flow [2021-12-22 13:48:19,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1879, PETRI_PLACES=315, PETRI_TRANSITIONS=323} [2021-12-22 13:48:19,951 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 114 predicate places. [2021-12-22 13:48:19,951 INFO L470 AbstractCegarLoop]: Abstraction has has 315 places, 323 transitions, 1879 flow [2021-12-22 13:48:19,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:19,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:19,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:19,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:48:19,952 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1360272567, now seen corresponding path program 11 times [2021-12-22 13:48:19,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:19,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747918078] [2021-12-22 13:48:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:19,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:20,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:20,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747918078] [2021-12-22 13:48:20,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747918078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:20,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:20,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:20,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645346994] [2021-12-22 13:48:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:20,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:20,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:20,478 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:20,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 323 transitions, 1879 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:20,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:20,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:20,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:21,228 INFO L129 PetriNetUnfolder]: 1386/3321 cut-off events. [2021-12-22 13:48:21,228 INFO L130 PetriNetUnfolder]: For 16058/16066 co-relation queries the response was YES. [2021-12-22 13:48:21,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12084 conditions, 3321 events. 1386/3321 cut-off events. For 16058/16066 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25869 event pairs, 775 based on Foata normal form. 1/3186 useless extension candidates. Maximal degree in co-relation 12025. Up to 1977 conditions per place. [2021-12-22 13:48:21,263 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 183 selfloop transitions, 51 changer transitions 5/374 dead transitions. [2021-12-22 13:48:21,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 374 transitions, 2798 flow [2021-12-22 13:48:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2765 transitions. [2021-12-22 13:48:21,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6888390632785252 [2021-12-22 13:48:21,266 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2765 transitions. [2021-12-22 13:48:21,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2765 transitions. [2021-12-22 13:48:21,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:21,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2765 transitions. [2021-12-22 13:48:21,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.61111111111111) internal successors, (2765), 18 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,275 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,275 INFO L186 Difference]: Start difference. First operand has 315 places, 323 transitions, 1879 flow. Second operand 18 states and 2765 transitions. [2021-12-22 13:48:21,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 374 transitions, 2798 flow [2021-12-22 13:48:21,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 374 transitions, 2602 flow, removed 69 selfloop flow, removed 11 redundant places. [2021-12-22 13:48:21,343 INFO L242 Difference]: Finished difference. Result has 323 places, 331 transitions, 1918 flow [2021-12-22 13:48:21,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1918, PETRI_PLACES=323, PETRI_TRANSITIONS=331} [2021-12-22 13:48:21,344 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 122 predicate places. [2021-12-22 13:48:21,345 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 331 transitions, 1918 flow [2021-12-22 13:48:21,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:21,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:21,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:48:21,346 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:21,346 INFO L85 PathProgramCache]: Analyzing trace with hash 776179595, now seen corresponding path program 12 times [2021-12-22 13:48:21,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:21,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770322091] [2021-12-22 13:48:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:21,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:21,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:21,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770322091] [2021-12-22 13:48:21,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770322091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:21,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:21,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:21,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67795631] [2021-12-22 13:48:21,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:21,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:21,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:21,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:21,983 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:21,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 331 transitions, 1918 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:21,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:21,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:21,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:22,903 INFO L129 PetriNetUnfolder]: 1458/3514 cut-off events. [2021-12-22 13:48:22,903 INFO L130 PetriNetUnfolder]: For 18674/18678 co-relation queries the response was YES. [2021-12-22 13:48:22,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12899 conditions, 3514 events. 1458/3514 cut-off events. For 18674/18678 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27992 event pairs, 744 based on Foata normal form. 2/3384 useless extension candidates. Maximal degree in co-relation 12837. Up to 2009 conditions per place. [2021-12-22 13:48:22,939 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 206 selfloop transitions, 61 changer transitions 5/407 dead transitions. [2021-12-22 13:48:22,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 407 transitions, 3113 flow [2021-12-22 13:48:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3085 transitions. [2021-12-22 13:48:22,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6917040358744395 [2021-12-22 13:48:22,942 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3085 transitions. [2021-12-22 13:48:22,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3085 transitions. [2021-12-22 13:48:22,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:22,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3085 transitions. [2021-12-22 13:48:22,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.25) internal successors, (3085), 20 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:22,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:22,951 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:22,951 INFO L186 Difference]: Start difference. First operand has 323 places, 331 transitions, 1918 flow. Second operand 20 states and 3085 transitions. [2021-12-22 13:48:22,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 407 transitions, 3113 flow [2021-12-22 13:48:23,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 407 transitions, 2975 flow, removed 37 selfloop flow, removed 11 redundant places. [2021-12-22 13:48:23,013 INFO L242 Difference]: Finished difference. Result has 337 places, 343 transitions, 2112 flow [2021-12-22 13:48:23,014 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2112, PETRI_PLACES=337, PETRI_TRANSITIONS=343} [2021-12-22 13:48:23,015 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 136 predicate places. [2021-12-22 13:48:23,015 INFO L470 AbstractCegarLoop]: Abstraction has has 337 places, 343 transitions, 2112 flow [2021-12-22 13:48:23,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:23,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:23,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:23,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:48:23,016 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:23,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1152778333, now seen corresponding path program 13 times [2021-12-22 13:48:23,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:23,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848456104] [2021-12-22 13:48:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:23,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:23,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:23,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848456104] [2021-12-22 13:48:23,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848456104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:23,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:23,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:23,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698249109] [2021-12-22 13:48:23,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:23,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:23,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:23,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:23,633 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:23,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 343 transitions, 2112 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:23,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:23,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:23,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:24,598 INFO L129 PetriNetUnfolder]: 1514/3776 cut-off events. [2021-12-22 13:48:24,599 INFO L130 PetriNetUnfolder]: For 23757/23779 co-relation queries the response was YES. [2021-12-22 13:48:24,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14210 conditions, 3776 events. 1514/3776 cut-off events. For 23757/23779 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31417 event pairs, 582 based on Foata normal form. 14/3632 useless extension candidates. Maximal degree in co-relation 14141. Up to 2109 conditions per place. [2021-12-22 13:48:24,638 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 211 selfloop transitions, 65 changer transitions 5/416 dead transitions. [2021-12-22 13:48:24,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 416 transitions, 3367 flow [2021-12-22 13:48:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3085 transitions. [2021-12-22 13:48:24,643 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6917040358744395 [2021-12-22 13:48:24,643 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3085 transitions. [2021-12-22 13:48:24,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3085 transitions. [2021-12-22 13:48:24,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:24,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3085 transitions. [2021-12-22 13:48:24,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.25) internal successors, (3085), 20 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:24,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:24,652 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:24,652 INFO L186 Difference]: Start difference. First operand has 337 places, 343 transitions, 2112 flow. Second operand 20 states and 3085 transitions. [2021-12-22 13:48:24,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 416 transitions, 3367 flow [2021-12-22 13:48:24,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 416 transitions, 3143 flow, removed 68 selfloop flow, removed 13 redundant places. [2021-12-22 13:48:24,736 INFO L242 Difference]: Finished difference. Result has 346 places, 355 transitions, 2265 flow [2021-12-22 13:48:24,736 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2265, PETRI_PLACES=346, PETRI_TRANSITIONS=355} [2021-12-22 13:48:24,737 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 145 predicate places. [2021-12-22 13:48:24,737 INFO L470 AbstractCegarLoop]: Abstraction has has 346 places, 355 transitions, 2265 flow [2021-12-22 13:48:24,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:24,737 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:24,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:24,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:48:24,738 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:24,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1468115147, now seen corresponding path program 14 times [2021-12-22 13:48:24,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:24,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68804456] [2021-12-22 13:48:24,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:24,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:25,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:25,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68804456] [2021-12-22 13:48:25,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68804456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:25,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:25,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:25,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877978684] [2021-12-22 13:48:25,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:25,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:25,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:25,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:25,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 355 transitions, 2265 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:25,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:25,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:25,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:26,363 INFO L129 PetriNetUnfolder]: 1556/3783 cut-off events. [2021-12-22 13:48:26,364 INFO L130 PetriNetUnfolder]: For 28094/28102 co-relation queries the response was YES. [2021-12-22 13:48:26,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14920 conditions, 3783 events. 1556/3783 cut-off events. For 28094/28102 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 30827 event pairs, 840 based on Foata normal form. 1/3630 useless extension candidates. Maximal degree in co-relation 14847. Up to 2190 conditions per place. [2021-12-22 13:48:26,403 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 218 selfloop transitions, 58 changer transitions 5/416 dead transitions. [2021-12-22 13:48:26,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 416 transitions, 3453 flow [2021-12-22 13:48:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2779 transitions. [2021-12-22 13:48:26,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.692326856003986 [2021-12-22 13:48:26,410 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2779 transitions. [2021-12-22 13:48:26,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2779 transitions. [2021-12-22 13:48:26,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:26,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2779 transitions. [2021-12-22 13:48:26,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.38888888888889) internal successors, (2779), 18 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:26,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:26,419 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:26,419 INFO L186 Difference]: Start difference. First operand has 346 places, 355 transitions, 2265 flow. Second operand 18 states and 2779 transitions. [2021-12-22 13:48:26,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 416 transitions, 3453 flow [2021-12-22 13:48:26,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 416 transitions, 3235 flow, removed 63 selfloop flow, removed 14 redundant places. [2021-12-22 13:48:26,586 INFO L242 Difference]: Finished difference. Result has 352 places, 361 transitions, 2354 flow [2021-12-22 13:48:26,586 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2354, PETRI_PLACES=352, PETRI_TRANSITIONS=361} [2021-12-22 13:48:26,587 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 151 predicate places. [2021-12-22 13:48:26,587 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 361 transitions, 2354 flow [2021-12-22 13:48:26,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:26,588 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:26,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:26,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:48:26,588 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:26,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1439899105, now seen corresponding path program 15 times [2021-12-22 13:48:26,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:26,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079992511] [2021-12-22 13:48:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:26,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:27,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079992511] [2021-12-22 13:48:27,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079992511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:27,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:27,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:27,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472852675] [2021-12-22 13:48:27,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:27,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:27,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:27,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:27,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 361 transitions, 2354 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:27,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:27,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:27,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:28,357 INFO L129 PetriNetUnfolder]: 1607/3955 cut-off events. [2021-12-22 13:48:28,357 INFO L130 PetriNetUnfolder]: For 33138/33146 co-relation queries the response was YES. [2021-12-22 13:48:28,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15863 conditions, 3955 events. 1607/3955 cut-off events. For 33138/33146 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 32735 event pairs, 838 based on Foata normal form. 1/3801 useless extension candidates. Maximal degree in co-relation 15786. Up to 2285 conditions per place. [2021-12-22 13:48:28,399 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 231 selfloop transitions, 63 changer transitions 5/434 dead transitions. [2021-12-22 13:48:28,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 434 transitions, 3737 flow [2021-12-22 13:48:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:48:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:48:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3089 transitions. [2021-12-22 13:48:28,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6926008968609866 [2021-12-22 13:48:28,407 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3089 transitions. [2021-12-22 13:48:28,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3089 transitions. [2021-12-22 13:48:28,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:28,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3089 transitions. [2021-12-22 13:48:28,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 154.45) internal successors, (3089), 20 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:28,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:28,419 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 223.0) internal successors, (4683), 21 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:28,420 INFO L186 Difference]: Start difference. First operand has 352 places, 361 transitions, 2354 flow. Second operand 20 states and 3089 transitions. [2021-12-22 13:48:28,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 434 transitions, 3737 flow [2021-12-22 13:48:28,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 434 transitions, 3520 flow, removed 68 selfloop flow, removed 13 redundant places. [2021-12-22 13:48:28,544 INFO L242 Difference]: Finished difference. Result has 361 places, 368 transitions, 2468 flow [2021-12-22 13:48:28,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2468, PETRI_PLACES=361, PETRI_TRANSITIONS=368} [2021-12-22 13:48:28,545 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 160 predicate places. [2021-12-22 13:48:28,546 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 368 transitions, 2468 flow [2021-12-22 13:48:28,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:28,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:28,547 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:28,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:48:28,548 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash -765625463, now seen corresponding path program 16 times [2021-12-22 13:48:28,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938334213] [2021-12-22 13:48:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:28,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:29,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:29,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938334213] [2021-12-22 13:48:29,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938334213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:29,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:29,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:29,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388968888] [2021-12-22 13:48:29,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:29,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:29,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:29,104 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:29,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 368 transitions, 2468 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:29,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:29,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:29,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:30,309 INFO L129 PetriNetUnfolder]: 1634/4097 cut-off events. [2021-12-22 13:48:30,309 INFO L130 PetriNetUnfolder]: For 36260/36282 co-relation queries the response was YES. [2021-12-22 13:48:30,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16508 conditions, 4097 events. 1634/4097 cut-off events. For 36260/36282 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35207 event pairs, 649 based on Foata normal form. 14/3940 useless extension candidates. Maximal degree in co-relation 16427. Up to 2357 conditions per place. [2021-12-22 13:48:30,344 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 228 selfloop transitions, 67 changer transitions 5/435 dead transitions. [2021-12-22 13:48:30,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 435 transitions, 3832 flow [2021-12-22 13:48:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:48:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:48:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2931 transitions. [2021-12-22 13:48:30,348 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6917630398867123 [2021-12-22 13:48:30,348 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2931 transitions. [2021-12-22 13:48:30,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2931 transitions. [2021-12-22 13:48:30,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:30,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2931 transitions. [2021-12-22 13:48:30,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.26315789473685) internal successors, (2931), 19 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:30,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:30,355 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:30,356 INFO L186 Difference]: Start difference. First operand has 361 places, 368 transitions, 2468 flow. Second operand 19 states and 2931 transitions. [2021-12-22 13:48:30,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 435 transitions, 3832 flow [2021-12-22 13:48:30,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 435 transitions, 3572 flow, removed 80 selfloop flow, removed 15 redundant places. [2021-12-22 13:48:30,536 INFO L242 Difference]: Finished difference. Result has 366 places, 378 transitions, 2556 flow [2021-12-22 13:48:30,536 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2257, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2556, PETRI_PLACES=366, PETRI_TRANSITIONS=378} [2021-12-22 13:48:30,536 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 165 predicate places. [2021-12-22 13:48:30,536 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 378 transitions, 2556 flow [2021-12-22 13:48:30,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:30,537 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:30,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:48:30,537 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1004685217, now seen corresponding path program 17 times [2021-12-22 13:48:30,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:30,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788059573] [2021-12-22 13:48:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:30,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:31,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:31,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788059573] [2021-12-22 13:48:31,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788059573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:31,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:31,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:31,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530884904] [2021-12-22 13:48:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:31,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:31,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:31,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:31,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 378 transitions, 2556 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:31,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:31,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:31,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:32,177 INFO L129 PetriNetUnfolder]: 1685/4151 cut-off events. [2021-12-22 13:48:32,177 INFO L130 PetriNetUnfolder]: For 37017/37027 co-relation queries the response was YES. [2021-12-22 13:48:32,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17149 conditions, 4151 events. 1685/4151 cut-off events. For 37017/37027 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35135 event pairs, 885 based on Foata normal form. 2/3991 useless extension candidates. Maximal degree in co-relation 17065. Up to 2384 conditions per place. [2021-12-22 13:48:32,212 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 240 selfloop transitions, 61 changer transitions 5/441 dead transitions. [2021-12-22 13:48:32,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 441 transitions, 3900 flow [2021-12-22 13:48:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2781 transitions. [2021-12-22 13:48:32,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6928251121076233 [2021-12-22 13:48:32,215 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2781 transitions. [2021-12-22 13:48:32,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2781 transitions. [2021-12-22 13:48:32,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:32,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2781 transitions. [2021-12-22 13:48:32,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.5) internal successors, (2781), 18 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:32,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:32,222 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:32,222 INFO L186 Difference]: Start difference. First operand has 366 places, 378 transitions, 2556 flow. Second operand 18 states and 2781 transitions. [2021-12-22 13:48:32,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 441 transitions, 3900 flow [2021-12-22 13:48:32,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 441 transitions, 3754 flow, removed 29 selfloop flow, removed 12 redundant places. [2021-12-22 13:48:32,348 INFO L242 Difference]: Finished difference. Result has 374 places, 385 transitions, 2754 flow [2021-12-22 13:48:32,348 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2754, PETRI_PLACES=374, PETRI_TRANSITIONS=385} [2021-12-22 13:48:32,348 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 173 predicate places. [2021-12-22 13:48:32,349 INFO L470 AbstractCegarLoop]: Abstraction has has 374 places, 385 transitions, 2754 flow [2021-12-22 13:48:32,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:32,349 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:32,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:32,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:48:32,350 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:32,350 INFO L85 PathProgramCache]: Analyzing trace with hash -735021351, now seen corresponding path program 18 times [2021-12-22 13:48:32,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:32,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790567461] [2021-12-22 13:48:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:32,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:32,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:32,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790567461] [2021-12-22 13:48:32,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790567461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:32,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:32,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:32,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731733095] [2021-12-22 13:48:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:32,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:32,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:32,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:32,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 385 transitions, 2754 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:32,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:32,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:32,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:33,916 INFO L129 PetriNetUnfolder]: 1697/4164 cut-off events. [2021-12-22 13:48:33,916 INFO L130 PetriNetUnfolder]: For 43192/43202 co-relation queries the response was YES. [2021-12-22 13:48:33,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17666 conditions, 4164 events. 1697/4164 cut-off events. For 43192/43202 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 35384 event pairs, 889 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 17579. Up to 2435 conditions per place. [2021-12-22 13:48:33,955 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 235 selfloop transitions, 66 changer transitions 5/441 dead transitions. [2021-12-22 13:48:33,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 441 transitions, 4012 flow [2021-12-22 13:48:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2774 transitions. [2021-12-22 13:48:33,958 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6910812157448929 [2021-12-22 13:48:33,958 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2774 transitions. [2021-12-22 13:48:33,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2774 transitions. [2021-12-22 13:48:33,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:33,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2774 transitions. [2021-12-22 13:48:33,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.11111111111111) internal successors, (2774), 18 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:33,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:33,963 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:33,963 INFO L186 Difference]: Start difference. First operand has 374 places, 385 transitions, 2754 flow. Second operand 18 states and 2774 transitions. [2021-12-22 13:48:33,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 441 transitions, 4012 flow [2021-12-22 13:48:34,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 441 transitions, 3816 flow, removed 68 selfloop flow, removed 12 redundant places. [2021-12-22 13:48:34,053 INFO L242 Difference]: Finished difference. Result has 382 places, 393 transitions, 2876 flow [2021-12-22 13:48:34,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2876, PETRI_PLACES=382, PETRI_TRANSITIONS=393} [2021-12-22 13:48:34,054 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 181 predicate places. [2021-12-22 13:48:34,054 INFO L470 AbstractCegarLoop]: Abstraction has has 382 places, 393 transitions, 2876 flow [2021-12-22 13:48:34,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:34,055 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:34,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:34,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:48:34,055 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash -838500479, now seen corresponding path program 19 times [2021-12-22 13:48:34,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:34,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783161278] [2021-12-22 13:48:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:34,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:34,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783161278] [2021-12-22 13:48:34,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783161278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:34,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:34,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:34,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881256326] [2021-12-22 13:48:34,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:34,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:34,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:34,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:34,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 393 transitions, 2876 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:34,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:34,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:34,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:35,818 INFO L129 PetriNetUnfolder]: 1705/4249 cut-off events. [2021-12-22 13:48:35,818 INFO L130 PetriNetUnfolder]: For 43744/43752 co-relation queries the response was YES. [2021-12-22 13:48:35,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17885 conditions, 4249 events. 1705/4249 cut-off events. For 43744/43752 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36672 event pairs, 771 based on Foata normal form. 5/4066 useless extension candidates. Maximal degree in co-relation 17794. Up to 2425 conditions per place. [2021-12-22 13:48:35,859 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 240 selfloop transitions, 66 changer transitions 5/446 dead transitions. [2021-12-22 13:48:35,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 446 transitions, 4119 flow [2021-12-22 13:48:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2770 transitions. [2021-12-22 13:48:35,862 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6900847035376183 [2021-12-22 13:48:35,862 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2770 transitions. [2021-12-22 13:48:35,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2770 transitions. [2021-12-22 13:48:35,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:35,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2770 transitions. [2021-12-22 13:48:35,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.88888888888889) internal successors, (2770), 18 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:35,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:35,869 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:35,870 INFO L186 Difference]: Start difference. First operand has 382 places, 393 transitions, 2876 flow. Second operand 18 states and 2770 transitions. [2021-12-22 13:48:35,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 446 transitions, 4119 flow [2021-12-22 13:48:36,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 446 transitions, 3891 flow, removed 54 selfloop flow, removed 14 redundant places. [2021-12-22 13:48:36,014 INFO L242 Difference]: Finished difference. Result has 388 places, 399 transitions, 2929 flow [2021-12-22 13:48:36,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2929, PETRI_PLACES=388, PETRI_TRANSITIONS=399} [2021-12-22 13:48:36,015 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 187 predicate places. [2021-12-22 13:48:36,015 INFO L470 AbstractCegarLoop]: Abstraction has has 388 places, 399 transitions, 2929 flow [2021-12-22 13:48:36,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:36,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:36,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:36,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:48:36,016 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 386610843, now seen corresponding path program 20 times [2021-12-22 13:48:36,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:36,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262398391] [2021-12-22 13:48:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:36,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:36,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:36,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262398391] [2021-12-22 13:48:36,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262398391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:36,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:36,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582234606] [2021-12-22 13:48:36,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:36,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:36,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:36,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:36,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 399 transitions, 2929 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:36,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:36,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:36,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:37,676 INFO L129 PetriNetUnfolder]: 1711/4330 cut-off events. [2021-12-22 13:48:37,676 INFO L130 PetriNetUnfolder]: For 45289/45310 co-relation queries the response was YES. [2021-12-22 13:48:37,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18060 conditions, 4330 events. 1711/4330 cut-off events. For 45289/45310 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38021 event pairs, 709 based on Foata normal form. 11/4159 useless extension candidates. Maximal degree in co-relation 17966. Up to 2461 conditions per place. [2021-12-22 13:48:37,713 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 247 selfloop transitions, 63 changer transitions 5/450 dead transitions. [2021-12-22 13:48:37,714 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 450 transitions, 4149 flow [2021-12-22 13:48:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2772 transitions. [2021-12-22 13:48:37,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6905829596412556 [2021-12-22 13:48:37,716 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2772 transitions. [2021-12-22 13:48:37,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2772 transitions. [2021-12-22 13:48:37,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:37,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2772 transitions. [2021-12-22 13:48:37,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.0) internal successors, (2772), 18 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:37,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:37,723 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:37,723 INFO L186 Difference]: Start difference. First operand has 388 places, 399 transitions, 2929 flow. Second operand 18 states and 2772 transitions. [2021-12-22 13:48:37,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 450 transitions, 4149 flow [2021-12-22 13:48:37,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 450 transitions, 3890 flow, removed 49 selfloop flow, removed 15 redundant places. [2021-12-22 13:48:37,840 INFO L242 Difference]: Finished difference. Result has 392 places, 403 transitions, 2886 flow [2021-12-22 13:48:37,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2675, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2886, PETRI_PLACES=392, PETRI_TRANSITIONS=403} [2021-12-22 13:48:37,840 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 191 predicate places. [2021-12-22 13:48:37,840 INFO L470 AbstractCegarLoop]: Abstraction has has 392 places, 403 transitions, 2886 flow [2021-12-22 13:48:37,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:37,841 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:37,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:37,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:48:37,841 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1947666141, now seen corresponding path program 21 times [2021-12-22 13:48:37,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:37,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617144213] [2021-12-22 13:48:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:37,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:38,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617144213] [2021-12-22 13:48:38,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617144213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:38,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:38,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:38,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884916242] [2021-12-22 13:48:38,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:38,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:38,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:38,429 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:38,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 403 transitions, 2886 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:38,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:38,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:38,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:39,544 INFO L129 PetriNetUnfolder]: 1711/4346 cut-off events. [2021-12-22 13:48:39,544 INFO L130 PetriNetUnfolder]: For 45111/45132 co-relation queries the response was YES. [2021-12-22 13:48:39,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17830 conditions, 4346 events. 1711/4346 cut-off events. For 45111/45132 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38034 event pairs, 712 based on Foata normal form. 11/4171 useless extension candidates. Maximal degree in co-relation 17735. Up to 2447 conditions per place. [2021-12-22 13:48:39,598 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 247 selfloop transitions, 64 changer transitions 5/451 dead transitions. [2021-12-22 13:48:39,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 451 transitions, 4087 flow [2021-12-22 13:48:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2768 transitions. [2021-12-22 13:48:39,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6895864474339811 [2021-12-22 13:48:39,601 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2768 transitions. [2021-12-22 13:48:39,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2768 transitions. [2021-12-22 13:48:39,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:39,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2768 transitions. [2021-12-22 13:48:39,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.77777777777777) internal successors, (2768), 18 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:39,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:39,622 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:39,622 INFO L186 Difference]: Start difference. First operand has 392 places, 403 transitions, 2886 flow. Second operand 18 states and 2768 transitions. [2021-12-22 13:48:39,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 451 transitions, 4087 flow [2021-12-22 13:48:39,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 451 transitions, 3901 flow, removed 32 selfloop flow, removed 15 redundant places. [2021-12-22 13:48:39,746 INFO L242 Difference]: Finished difference. Result has 396 places, 406 transitions, 2901 flow [2021-12-22 13:48:39,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2901, PETRI_PLACES=396, PETRI_TRANSITIONS=406} [2021-12-22 13:48:39,747 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 195 predicate places. [2021-12-22 13:48:39,747 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 406 transitions, 2901 flow [2021-12-22 13:48:39,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:39,747 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:39,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:39,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:48:39,748 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:39,748 INFO L85 PathProgramCache]: Analyzing trace with hash 109708599, now seen corresponding path program 22 times [2021-12-22 13:48:39,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029387914] [2021-12-22 13:48:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:39,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:40,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:40,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029387914] [2021-12-22 13:48:40,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029387914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:40,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:40,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:40,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799235971] [2021-12-22 13:48:40,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:40,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:40,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:40,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:40,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 406 transitions, 2901 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:40,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:40,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:40,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:41,250 INFO L129 PetriNetUnfolder]: 1711/4308 cut-off events. [2021-12-22 13:48:41,250 INFO L130 PetriNetUnfolder]: For 44886/44908 co-relation queries the response was YES. [2021-12-22 13:48:41,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17745 conditions, 4308 events. 1711/4308 cut-off events. For 44886/44908 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 37842 event pairs, 701 based on Foata normal form. 14/4142 useless extension candidates. Maximal degree in co-relation 17648. Up to 2453 conditions per place. [2021-12-22 13:48:41,290 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 251 selfloop transitions, 62 changer transitions 5/453 dead transitions. [2021-12-22 13:48:41,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 453 transitions, 4096 flow [2021-12-22 13:48:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2767 transitions. [2021-12-22 13:48:41,292 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6893373193821625 [2021-12-22 13:48:41,293 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2767 transitions. [2021-12-22 13:48:41,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2767 transitions. [2021-12-22 13:48:41,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:41,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2767 transitions. [2021-12-22 13:48:41,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.72222222222223) internal successors, (2767), 18 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:41,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:41,299 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:41,299 INFO L186 Difference]: Start difference. First operand has 396 places, 406 transitions, 2901 flow. Second operand 18 states and 2767 transitions. [2021-12-22 13:48:41,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 453 transitions, 4096 flow [2021-12-22 13:48:41,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 453 transitions, 3904 flow, removed 33 selfloop flow, removed 15 redundant places. [2021-12-22 13:48:41,433 INFO L242 Difference]: Finished difference. Result has 400 places, 409 transitions, 2887 flow [2021-12-22 13:48:41,433 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2887, PETRI_PLACES=400, PETRI_TRANSITIONS=409} [2021-12-22 13:48:41,433 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 199 predicate places. [2021-12-22 13:48:41,433 INFO L470 AbstractCegarLoop]: Abstraction has has 400 places, 409 transitions, 2887 flow [2021-12-22 13:48:41,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:41,434 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:41,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:41,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:48:41,434 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1019999163, now seen corresponding path program 23 times [2021-12-22 13:48:41,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202449776] [2021-12-22 13:48:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:41,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:41,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202449776] [2021-12-22 13:48:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202449776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:41,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:41,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:41,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609754193] [2021-12-22 13:48:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:41,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:41,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:41,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:41,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 409 transitions, 2887 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:41,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:41,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:41,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:43,048 INFO L129 PetriNetUnfolder]: 1764/4472 cut-off events. [2021-12-22 13:48:43,048 INFO L130 PetriNetUnfolder]: For 48725/48745 co-relation queries the response was YES. [2021-12-22 13:48:43,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18488 conditions, 4472 events. 1764/4472 cut-off events. For 48725/48745 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 39453 event pairs, 691 based on Foata normal form. 9/4294 useless extension candidates. Maximal degree in co-relation 18389. Up to 2392 conditions per place. [2021-12-22 13:48:43,230 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 253 selfloop transitions, 82 changer transitions 5/475 dead transitions. [2021-12-22 13:48:43,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 475 transitions, 4384 flow [2021-12-22 13:48:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:48:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:48:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2928 transitions. [2021-12-22 13:48:43,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6910549917394383 [2021-12-22 13:48:43,234 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2928 transitions. [2021-12-22 13:48:43,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2928 transitions. [2021-12-22 13:48:43,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:43,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2928 transitions. [2021-12-22 13:48:43,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.10526315789474) internal successors, (2928), 19 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:43,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:43,241 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:43,241 INFO L186 Difference]: Start difference. First operand has 400 places, 409 transitions, 2887 flow. Second operand 19 states and 2928 transitions. [2021-12-22 13:48:43,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 475 transitions, 4384 flow [2021-12-22 13:48:43,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 475 transitions, 4285 flow, removed 4 selfloop flow, removed 14 redundant places. [2021-12-22 13:48:43,367 INFO L242 Difference]: Finished difference. Result has 408 places, 421 transitions, 3263 flow [2021-12-22 13:48:43,367 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3263, PETRI_PLACES=408, PETRI_TRANSITIONS=421} [2021-12-22 13:48:43,367 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 207 predicate places. [2021-12-22 13:48:43,368 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 421 transitions, 3263 flow [2021-12-22 13:48:43,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:43,368 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:43,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:43,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 13:48:43,369 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1739466355, now seen corresponding path program 24 times [2021-12-22 13:48:43,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:43,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172595296] [2021-12-22 13:48:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:43,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:43,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:43,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172595296] [2021-12-22 13:48:43,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172595296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:43,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:43,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:43,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60127350] [2021-12-22 13:48:43,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:43,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:43,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:43,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:43,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:43,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 421 transitions, 3263 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:43,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:43,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:43,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:45,143 INFO L129 PetriNetUnfolder]: 1806/4610 cut-off events. [2021-12-22 13:48:45,144 INFO L130 PetriNetUnfolder]: For 59771/59791 co-relation queries the response was YES. [2021-12-22 13:48:45,188 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19822 conditions, 4610 events. 1806/4610 cut-off events. For 59771/59791 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41121 event pairs, 747 based on Foata normal form. 9/4423 useless extension candidates. Maximal degree in co-relation 19719. Up to 2547 conditions per place. [2021-12-22 13:48:45,205 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 272 selfloop transitions, 73 changer transitions 5/485 dead transitions. [2021-12-22 13:48:45,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 485 transitions, 4859 flow [2021-12-22 13:48:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:48:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:48:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2930 transitions. [2021-12-22 13:48:45,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.691527023837621 [2021-12-22 13:48:45,208 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2930 transitions. [2021-12-22 13:48:45,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2930 transitions. [2021-12-22 13:48:45,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:45,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2930 transitions. [2021-12-22 13:48:45,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.21052631578948) internal successors, (2930), 19 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:45,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:45,215 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:45,215 INFO L186 Difference]: Start difference. First operand has 408 places, 421 transitions, 3263 flow. Second operand 19 states and 2930 transitions. [2021-12-22 13:48:45,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 485 transitions, 4859 flow [2021-12-22 13:48:45,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 485 transitions, 4562 flow, removed 103 selfloop flow, removed 13 redundant places. [2021-12-22 13:48:45,502 INFO L242 Difference]: Finished difference. Result has 416 places, 427 transitions, 3392 flow [2021-12-22 13:48:45,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3392, PETRI_PLACES=416, PETRI_TRANSITIONS=427} [2021-12-22 13:48:45,503 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 215 predicate places. [2021-12-22 13:48:45,503 INFO L470 AbstractCegarLoop]: Abstraction has has 416 places, 427 transitions, 3392 flow [2021-12-22 13:48:45,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:45,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:45,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:45,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:48:45,504 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash -930338993, now seen corresponding path program 25 times [2021-12-22 13:48:45,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:45,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487110843] [2021-12-22 13:48:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:45,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:45,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:45,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487110843] [2021-12-22 13:48:45,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487110843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:45,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:45,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:45,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176988548] [2021-12-22 13:48:45,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:46,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:46,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:46,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:46,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:46,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:46,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 427 transitions, 3392 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:46,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:46,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:46,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:47,067 INFO L129 PetriNetUnfolder]: 1816/4631 cut-off events. [2021-12-22 13:48:47,067 INFO L130 PetriNetUnfolder]: For 59612/59634 co-relation queries the response was YES. [2021-12-22 13:48:47,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19982 conditions, 4631 events. 1816/4631 cut-off events. For 59612/59634 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 41476 event pairs, 772 based on Foata normal form. 14/4440 useless extension candidates. Maximal degree in co-relation 19876. Up to 2642 conditions per place. [2021-12-22 13:48:47,119 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 271 selfloop transitions, 67 changer transitions 5/478 dead transitions. [2021-12-22 13:48:47,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 478 transitions, 4843 flow [2021-12-22 13:48:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2766 transitions. [2021-12-22 13:48:47,122 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6890881913303438 [2021-12-22 13:48:47,122 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2766 transitions. [2021-12-22 13:48:47,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2766 transitions. [2021-12-22 13:48:47,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:47,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2766 transitions. [2021-12-22 13:48:47,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.66666666666666) internal successors, (2766), 18 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:47,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:47,128 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:47,128 INFO L186 Difference]: Start difference. First operand has 416 places, 427 transitions, 3392 flow. Second operand 18 states and 2766 transitions. [2021-12-22 13:48:47,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 478 transitions, 4843 flow [2021-12-22 13:48:47,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 478 transitions, 4546 flow, removed 95 selfloop flow, removed 14 redundant places. [2021-12-22 13:48:47,478 INFO L242 Difference]: Finished difference. Result has 421 places, 435 transitions, 3468 flow [2021-12-22 13:48:47,478 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3468, PETRI_PLACES=421, PETRI_TRANSITIONS=435} [2021-12-22 13:48:47,478 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 220 predicate places. [2021-12-22 13:48:47,478 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 435 transitions, 3468 flow [2021-12-22 13:48:47,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:47,479 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:47,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:47,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:48:47,480 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash -907769797, now seen corresponding path program 26 times [2021-12-22 13:48:47,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:47,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262095239] [2021-12-22 13:48:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:47,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:48,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262095239] [2021-12-22 13:48:48,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262095239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:48,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:48,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:48,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459271039] [2021-12-22 13:48:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:48,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:48,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:48,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:48,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 435 transitions, 3468 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:48,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:48,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:48,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:49,352 INFO L129 PetriNetUnfolder]: 1856/4657 cut-off events. [2021-12-22 13:48:49,352 INFO L130 PetriNetUnfolder]: For 62722/62732 co-relation queries the response was YES. [2021-12-22 13:48:49,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20457 conditions, 4657 events. 1856/4657 cut-off events. For 62722/62732 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 41330 event pairs, 949 based on Foata normal form. 2/4462 useless extension candidates. Maximal degree in co-relation 20348. Up to 2589 conditions per place. [2021-12-22 13:48:49,427 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 283 selfloop transitions, 79 changer transitions 5/502 dead transitions. [2021-12-22 13:48:49,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 502 transitions, 5063 flow [2021-12-22 13:48:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:48:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:48:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2930 transitions. [2021-12-22 13:48:49,430 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.691527023837621 [2021-12-22 13:48:49,430 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2930 transitions. [2021-12-22 13:48:49,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2930 transitions. [2021-12-22 13:48:49,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:49,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2930 transitions. [2021-12-22 13:48:49,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 154.21052631578948) internal successors, (2930), 19 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:49,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:49,437 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 223.0) internal successors, (4460), 20 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:49,438 INFO L186 Difference]: Start difference. First operand has 421 places, 435 transitions, 3468 flow. Second operand 19 states and 2930 transitions. [2021-12-22 13:48:49,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 502 transitions, 5063 flow [2021-12-22 13:48:49,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 502 transitions, 4831 flow, removed 77 selfloop flow, removed 11 redundant places. [2021-12-22 13:48:49,667 INFO L242 Difference]: Finished difference. Result has 432 places, 445 transitions, 3685 flow [2021-12-22 13:48:49,667 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3685, PETRI_PLACES=432, PETRI_TRANSITIONS=445} [2021-12-22 13:48:49,668 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 231 predicate places. [2021-12-22 13:48:49,668 INFO L470 AbstractCegarLoop]: Abstraction has has 432 places, 445 transitions, 3685 flow [2021-12-22 13:48:49,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:49,669 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:49,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 13:48:49,670 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:49,670 INFO L85 PathProgramCache]: Analyzing trace with hash 26052429, now seen corresponding path program 27 times [2021-12-22 13:48:49,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:49,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836954220] [2021-12-22 13:48:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:49,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:50,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:50,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836954220] [2021-12-22 13:48:50,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836954220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:50,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:50,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:50,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039629843] [2021-12-22 13:48:50,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:50,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:50,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:50,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:50,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:50,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 445 transitions, 3685 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:50,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:50,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:50,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:51,602 INFO L129 PetriNetUnfolder]: 1898/4772 cut-off events. [2021-12-22 13:48:51,602 INFO L130 PetriNetUnfolder]: For 74943/74953 co-relation queries the response was YES. [2021-12-22 13:48:51,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21821 conditions, 4772 events. 1898/4772 cut-off events. For 74943/74953 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 42615 event pairs, 1000 based on Foata normal form. 2/4575 useless extension candidates. Maximal degree in co-relation 21707. Up to 2726 conditions per place. [2021-12-22 13:48:51,659 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 294 selfloop transitions, 72 changer transitions 5/506 dead transitions. [2021-12-22 13:48:51,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 506 transitions, 5395 flow [2021-12-22 13:48:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:48:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2780 transitions. [2021-12-22 13:48:51,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6925759840558047 [2021-12-22 13:48:51,662 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2780 transitions. [2021-12-22 13:48:51,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2780 transitions. [2021-12-22 13:48:51,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:48:51,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2780 transitions. [2021-12-22 13:48:51,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.44444444444446) internal successors, (2780), 18 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:51,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:51,667 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 223.0) internal successors, (4237), 19 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:51,667 INFO L186 Difference]: Start difference. First operand has 432 places, 445 transitions, 3685 flow. Second operand 18 states and 2780 transitions. [2021-12-22 13:48:51,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 506 transitions, 5395 flow [2021-12-22 13:48:51,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 506 transitions, 5093 flow, removed 101 selfloop flow, removed 13 redundant places. [2021-12-22 13:48:51,864 INFO L242 Difference]: Finished difference. Result has 439 places, 451 transitions, 3824 flow [2021-12-22 13:48:51,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3824, PETRI_PLACES=439, PETRI_TRANSITIONS=451} [2021-12-22 13:48:51,865 INFO L334 CegarLoopForPetriNet]: 201 programPoint places, 238 predicate places. [2021-12-22 13:48:51,865 INFO L470 AbstractCegarLoop]: Abstraction has has 439 places, 451 transitions, 3824 flow [2021-12-22 13:48:51,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:51,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:48:51,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:48:51,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 13:48:51,866 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:48:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:48:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1615365353, now seen corresponding path program 28 times [2021-12-22 13:48:51,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:48:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791551240] [2021-12-22 13:48:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:48:51,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:48:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:48:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:48:52,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:48:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791551240] [2021-12-22 13:48:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791551240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:48:52,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:48:52,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 13:48:52,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925469900] [2021-12-22 13:48:52,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:48:52,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:48:52,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:48:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:48:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:48:52,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 223 [2021-12-22 13:48:52,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 451 transitions, 3824 flow. Second operand has 18 states, 18 states have (on average 148.83333333333334) internal successors, (2679), 18 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:48:52,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:48:52,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 223 [2021-12-22 13:48:52,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:48:53,828 INFO L129 PetriNetUnfolder]: 1910/4938 cut-off events. [2021-12-22 13:48:53,829 INFO L130 PetriNetUnfolder]: For 77954/77974 co-relation queries the response was YES. [2021-12-22 13:48:53,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22113 conditions, 4938 events. 1910/4938 cut-off events. For 77954/77974 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 45176 event pairs, 832 based on Foata normal form. 9/4735 useless extension candidates. Maximal degree in co-relation 21995. Up to 2792 conditions per place. [2021-12-22 13:48:53,894 INFO L132 encePairwiseOnDemand]: 204/223 looper letters, 290 selfloop transitions, 74 changer transitions 5/504 dead transitions. [2021-12-22 13:48:53,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 504 transitions, 5280 flow [2021-12-22 13:48:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:48:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states.