./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy7.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-easy7.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 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:56:01,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:56:01,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:56:01,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:56:01,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:56:01,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:56:01,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:56:01,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:56:01,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:56:01,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:56:01,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:56:01,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:56:01,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:56:01,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:56:01,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:56:01,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:56:01,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:56:01,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:56:01,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:56:01,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:56:01,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:56:01,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:56:01,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:56:01,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:56:01,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:56:01,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:56:01,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:56:01,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:56:01,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:56:01,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:56:01,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:56:01,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:56:01,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:56:01,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:56:01,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:56:01,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:56:01,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:56:01,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:56:01,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:56:01,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:56:01,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:56:01,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:56:01,573 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:56:01,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:56:01,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:56:01,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:56:01,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:56:01,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:56:01,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:56:01,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:56:01,576 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:56:01,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:56:01,576 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:56:01,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:56:01,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:56:01,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:56:01,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:56:01,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:56:01,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:56:01,577 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:56:01,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:56:01,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:56:01,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:56:01,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:56:01,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:56:01,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:56:01,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:56:01,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:56:01,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:56:01,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:56:01,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:56:01,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:56:01,583 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:56:01,583 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:56:01,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:56:01,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:56:01,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89875838ba00841ab95f284d6aeb82a1a762d2b06c5f173202307480dc57b4e4 [2021-12-14 16:56:01,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:56:01,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:56:01,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:56:01,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:56:01,783 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:56:01,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-12-14 16:56:01,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/778575515/2a58a1328c1d4d1d8864e4644b9dd17c/FLAG2e02f9fe3 [2021-12-14 16:56:02,225 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:56:02,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy7.wvr.c [2021-12-14 16:56:02,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/778575515/2a58a1328c1d4d1d8864e4644b9dd17c/FLAG2e02f9fe3 [2021-12-14 16:56:02,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/778575515/2a58a1328c1d4d1d8864e4644b9dd17c [2021-12-14 16:56:02,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:56:02,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:56:02,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:56:02,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:56:02,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:56:02,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d78e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02, skipping insertion in model container [2021-12-14 16:56:02,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:56:02,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:56:02,447 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy7.wvr.c[1872,1885] [2021-12-14 16:56:02,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:56:02,456 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:56:02,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy7.wvr.c[1872,1885] [2021-12-14 16:56:02,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:56:02,492 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:56:02,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02 WrapperNode [2021-12-14 16:56:02,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:56:02,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:56:02,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:56:02,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:56:02,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,521 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-14 16:56:02,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:56:02,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:56:02,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:56:02,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:56:02,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:56:02,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:56:02,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:56:02,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:56:02,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (1/1) ... [2021-12-14 16:56:02,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:56:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:02,583 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) [2021-12-14 16:56:02,618 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 [2021-12-14 16:56:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:56:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:56:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:56:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:56:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:56:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:56:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:56:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:56:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:56:02,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:56:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:56:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:56:02,635 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:56:02,688 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:56:02,690 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:56:02,834 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:56:02,839 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:56:02,839 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 16:56:02,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:56:02 BoogieIcfgContainer [2021-12-14 16:56:02,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:56:02,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:56:02,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:56:02,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:56:02,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:56:02" (1/3) ... [2021-12-14 16:56:02,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433b584f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:56:02, skipping insertion in model container [2021-12-14 16:56:02,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:02" (2/3) ... [2021-12-14 16:56:02,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433b584f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:56:02, skipping insertion in model container [2021-12-14 16:56:02,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:56:02" (3/3) ... [2021-12-14 16:56:02,855 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy7.wvr.c [2021-12-14 16:56:02,858 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:56:02,859 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:56:02,859 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:56:02,859 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:56:02,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,894 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:02,915 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:56:02,947 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:56:02,952 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 [2021-12-14 16:56:02,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:56:02,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 204 flow [2021-12-14 16:56:03,011 INFO L129 PetriNetUnfolder]: 2/92 cut-off events. [2021-12-14 16:56:03,011 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:56:03,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 2/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2021-12-14 16:56:03,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 204 flow [2021-12-14 16:56:03,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 83 transitions, 178 flow [2021-12-14 16:56:03,039 INFO L129 PetriNetUnfolder]: 2/82 cut-off events. [2021-12-14 16:56:03,039 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:56:03,039 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:03,040 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] [2021-12-14 16:56:03,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash 126118782, now seen corresponding path program 1 times [2021-12-14 16:56:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092526344] [2021-12-14 16:56:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:03,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:03,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092526344] [2021-12-14 16:56:03,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092526344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:03,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:03,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:03,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267635762] [2021-12-14 16:56:03,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:03,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:03,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:03,969 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:03,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 178 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:03,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:03,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:03,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:05,047 INFO L129 PetriNetUnfolder]: 179/513 cut-off events. [2021-12-14 16:56:05,047 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-12-14 16:56:05,050 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 513 events. 179/513 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2096 event pairs, 133 based on Foata normal form. 3/508 useless extension candidates. Maximal degree in co-relation 822. Up to 332 conditions per place. [2021-12-14 16:56:05,054 INFO L132 encePairwiseOnDemand]: 60/94 looper letters, 47 selfloop transitions, 28 changer transitions 34/148 dead transitions. [2021-12-14 16:56:05,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 535 flow [2021-12-14 16:56:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:56:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:56:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1583 transitions. [2021-12-14 16:56:05,074 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5613475177304964 [2021-12-14 16:56:05,074 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1583 transitions. [2021-12-14 16:56:05,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1583 transitions. [2021-12-14 16:56:05,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:05,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1583 transitions. [2021-12-14 16:56:05,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.766666666666666) internal successors, (1583), 30 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:05,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:05,103 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:05,105 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 178 flow. Second operand 30 states and 1583 transitions. [2021-12-14 16:56:05,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 535 flow [2021-12-14 16:56:05,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 521 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:56:05,112 INFO L242 Difference]: Finished difference. Result has 136 places, 103 transitions, 360 flow [2021-12-14 16:56:05,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=360, PETRI_PLACES=136, PETRI_TRANSITIONS=103} [2021-12-14 16:56:05,116 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 48 predicate places. [2021-12-14 16:56:05,116 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 103 transitions, 360 flow [2021-12-14 16:56:05,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:05,117 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:05,117 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] [2021-12-14 16:56:05,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:56:05,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1479619674, now seen corresponding path program 2 times [2021-12-14 16:56:05,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:05,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62735236] [2021-12-14 16:56:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:05,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:05,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:05,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62735236] [2021-12-14 16:56:05,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62735236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:05,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:05,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-14 16:56:05,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628072993] [2021-12-14 16:56:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:05,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 16:56:05,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:05,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 16:56:05,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:56:05,514 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:05,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 103 transitions, 360 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:05,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:05,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:05,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:06,513 INFO L129 PetriNetUnfolder]: 202/559 cut-off events. [2021-12-14 16:56:06,513 INFO L130 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2021-12-14 16:56:06,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 559 events. 202/559 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2482 event pairs, 22 based on Foata normal form. 1/558 useless extension candidates. Maximal degree in co-relation 1515. Up to 329 conditions per place. [2021-12-14 16:56:06,517 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 82 selfloop transitions, 42 changer transitions 36/199 dead transitions. [2021-12-14 16:56:06,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 1049 flow [2021-12-14 16:56:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 16:56:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-14 16:56:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1561 transitions. [2021-12-14 16:56:06,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5726338958180485 [2021-12-14 16:56:06,531 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1561 transitions. [2021-12-14 16:56:06,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1561 transitions. [2021-12-14 16:56:06,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:06,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1561 transitions. [2021-12-14 16:56:06,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.827586206896555) internal successors, (1561), 29 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:06,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:06,538 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:06,538 INFO L186 Difference]: Start difference. First operand has 136 places, 103 transitions, 360 flow. Second operand 29 states and 1561 transitions. [2021-12-14 16:56:06,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 1049 flow [2021-12-14 16:56:06,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 955 flow, removed 38 selfloop flow, removed 13 redundant places. [2021-12-14 16:56:06,553 INFO L242 Difference]: Finished difference. Result has 156 places, 139 transitions, 637 flow [2021-12-14 16:56:06,553 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=637, PETRI_PLACES=156, PETRI_TRANSITIONS=139} [2021-12-14 16:56:06,554 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 68 predicate places. [2021-12-14 16:56:06,554 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 139 transitions, 637 flow [2021-12-14 16:56:06,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:06,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:06,556 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] [2021-12-14 16:56:06,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:56:06,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1215992582, now seen corresponding path program 3 times [2021-12-14 16:56:06,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:06,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920577713] [2021-12-14 16:56:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:06,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:06,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:06,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920577713] [2021-12-14 16:56:06,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920577713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:06,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:06,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 16:56:06,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165173808] [2021-12-14 16:56:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:06,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:56:06,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:56:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:56:06,964 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:06,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 139 transitions, 637 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:06,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:06,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:06,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:08,314 INFO L129 PetriNetUnfolder]: 240/651 cut-off events. [2021-12-14 16:56:08,315 INFO L130 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2021-12-14 16:56:08,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 651 events. 240/651 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3070 event pairs, 42 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 2226. Up to 401 conditions per place. [2021-12-14 16:56:08,319 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 102 selfloop transitions, 56 changer transitions 43/240 dead transitions. [2021-12-14 16:56:08,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 240 transitions, 1595 flow [2021-12-14 16:56:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-14 16:56:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-14 16:56:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2062 transitions. [2021-12-14 16:56:08,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624659028914348 [2021-12-14 16:56:08,329 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2062 transitions. [2021-12-14 16:56:08,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2062 transitions. [2021-12-14 16:56:08,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:08,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2062 transitions. [2021-12-14 16:56:08,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.87179487179487) internal successors, (2062), 39 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:08,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:08,340 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 94.0) internal successors, (3760), 40 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:08,340 INFO L186 Difference]: Start difference. First operand has 156 places, 139 transitions, 637 flow. Second operand 39 states and 2062 transitions. [2021-12-14 16:56:08,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 240 transitions, 1595 flow [2021-12-14 16:56:08,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 1454 flow, removed 66 selfloop flow, removed 11 redundant places. [2021-12-14 16:56:08,353 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 1065 flow [2021-12-14 16:56:08,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1065, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2021-12-14 16:56:08,355 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 113 predicate places. [2021-12-14 16:56:08,356 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 1065 flow [2021-12-14 16:56:08,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:08,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:08,357 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] [2021-12-14 16:56:08,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:56:08,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1665333946, now seen corresponding path program 4 times [2021-12-14 16:56:08,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:08,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888524943] [2021-12-14 16:56:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:08,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:08,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888524943] [2021-12-14 16:56:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888524943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:08,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:08,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:08,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87035846] [2021-12-14 16:56:08,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:08,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:08,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:08,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:08,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 1065 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:08,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:08,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:08,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:09,652 INFO L129 PetriNetUnfolder]: 238/637 cut-off events. [2021-12-14 16:56:09,652 INFO L130 PetriNetUnfolder]: For 1491/1491 co-relation queries the response was YES. [2021-12-14 16:56:09,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 637 events. 238/637 cut-off events. For 1491/1491 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2989 event pairs, 3 based on Foata normal form. 1/637 useless extension candidates. Maximal degree in co-relation 2564. Up to 403 conditions per place. [2021-12-14 16:56:09,692 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 111 selfloop transitions, 53 changer transitions 44/247 dead transitions. [2021-12-14 16:56:09,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 247 transitions, 1855 flow [2021-12-14 16:56:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 16:56:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-14 16:56:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1502 transitions. [2021-12-14 16:56:09,696 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5706686930091185 [2021-12-14 16:56:09,696 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1502 transitions. [2021-12-14 16:56:09,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1502 transitions. [2021-12-14 16:56:09,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:09,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1502 transitions. [2021-12-14 16:56:09,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 53.642857142857146) internal successors, (1502), 28 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:09,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:09,706 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 94.0) internal successors, (2726), 29 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:09,706 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 1065 flow. Second operand 28 states and 1502 transitions. [2021-12-14 16:56:09,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 247 transitions, 1855 flow [2021-12-14 16:56:09,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 247 transitions, 1633 flow, removed 89 selfloop flow, removed 18 redundant places. [2021-12-14 16:56:09,720 INFO L242 Difference]: Finished difference. Result has 213 places, 187 transitions, 1114 flow [2021-12-14 16:56:09,721 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1114, PETRI_PLACES=213, PETRI_TRANSITIONS=187} [2021-12-14 16:56:09,722 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 125 predicate places. [2021-12-14 16:56:09,722 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 187 transitions, 1114 flow [2021-12-14 16:56:09,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:09,722 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:09,723 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] [2021-12-14 16:56:09,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:56:09,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash 699227332, now seen corresponding path program 5 times [2021-12-14 16:56:09,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097922525] [2021-12-14 16:56:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:09,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:10,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:10,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097922525] [2021-12-14 16:56:10,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097922525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:10,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:10,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:10,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793351416] [2021-12-14 16:56:10,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:10,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:10,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:10,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:10,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 187 transitions, 1114 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:10,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:10,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:10,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:11,211 INFO L129 PetriNetUnfolder]: 261/695 cut-off events. [2021-12-14 16:56:11,211 INFO L130 PetriNetUnfolder]: For 1977/1977 co-relation queries the response was YES. [2021-12-14 16:56:11,215 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 695 events. 261/695 cut-off events. For 1977/1977 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3342 event pairs, 20 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 2932. Up to 446 conditions per place. [2021-12-14 16:56:11,218 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 131 selfloop transitions, 61 changer transitions 43/274 dead transitions. [2021-12-14 16:56:11,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 274 transitions, 2242 flow [2021-12-14 16:56:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 16:56:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-14 16:56:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-12-14 16:56:11,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-12-14 16:56:11,222 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-12-14 16:56:11,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-12-14 16:56:11,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:11,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-12-14 16:56:11,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:11,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:11,228 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:11,228 INFO L186 Difference]: Start difference. First operand has 213 places, 187 transitions, 1114 flow. Second operand 35 states and 1861 transitions. [2021-12-14 16:56:11,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 274 transitions, 2242 flow [2021-12-14 16:56:11,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 274 transitions, 1993 flow, removed 66 selfloop flow, removed 24 redundant places. [2021-12-14 16:56:11,240 INFO L242 Difference]: Finished difference. Result has 234 places, 215 transitions, 1438 flow [2021-12-14 16:56:11,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1438, PETRI_PLACES=234, PETRI_TRANSITIONS=215} [2021-12-14 16:56:11,241 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 146 predicate places. [2021-12-14 16:56:11,241 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 215 transitions, 1438 flow [2021-12-14 16:56:11,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:11,242 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:11,242 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] [2021-12-14 16:56:11,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:56:11,242 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:11,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:11,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1519473010, now seen corresponding path program 6 times [2021-12-14 16:56:11,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:11,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474377082] [2021-12-14 16:56:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:11,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:11,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474377082] [2021-12-14 16:56:11,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474377082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:11,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:11,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:11,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793508761] [2021-12-14 16:56:11,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:11,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:11,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:11,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:11,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:11,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 215 transitions, 1438 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:11,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:11,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:11,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:12,663 INFO L129 PetriNetUnfolder]: 265/703 cut-off events. [2021-12-14 16:56:12,663 INFO L130 PetriNetUnfolder]: For 2379/2379 co-relation queries the response was YES. [2021-12-14 16:56:12,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 703 events. 265/703 cut-off events. For 2379/2379 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3416 event pairs, 19 based on Foata normal form. 1/702 useless extension candidates. Maximal degree in co-relation 3094. Up to 459 conditions per place. [2021-12-14 16:56:12,669 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 74 changer transitions 43/282 dead transitions. [2021-12-14 16:56:12,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 282 transitions, 2337 flow [2021-12-14 16:56:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1657 transitions. [2021-12-14 16:56:12,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5686341798215512 [2021-12-14 16:56:12,672 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1657 transitions. [2021-12-14 16:56:12,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1657 transitions. [2021-12-14 16:56:12,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:12,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1657 transitions. [2021-12-14 16:56:12,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.45161290322581) internal successors, (1657), 31 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:12,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:12,678 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:12,678 INFO L186 Difference]: Start difference. First operand has 234 places, 215 transitions, 1438 flow. Second operand 31 states and 1657 transitions. [2021-12-14 16:56:12,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 282 transitions, 2337 flow [2021-12-14 16:56:12,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 282 transitions, 2057 flow, removed 109 selfloop flow, removed 23 redundant places. [2021-12-14 16:56:12,691 INFO L242 Difference]: Finished difference. Result has 245 places, 224 transitions, 1536 flow [2021-12-14 16:56:12,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1536, PETRI_PLACES=245, PETRI_TRANSITIONS=224} [2021-12-14 16:56:12,692 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 157 predicate places. [2021-12-14 16:56:12,693 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 224 transitions, 1536 flow [2021-12-14 16:56:12,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:12,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:12,693 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] [2021-12-14 16:56:12,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:56:12,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:12,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1201914780, now seen corresponding path program 7 times [2021-12-14 16:56:12,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:12,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408812392] [2021-12-14 16:56:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:12,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:13,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:13,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408812392] [2021-12-14 16:56:13,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408812392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:13,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:13,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:13,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112188574] [2021-12-14 16:56:13,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:13,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:13,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:13,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:13,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 224 transitions, 1536 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:13,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:13,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:13,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:14,159 INFO L129 PetriNetUnfolder]: 264/744 cut-off events. [2021-12-14 16:56:14,159 INFO L130 PetriNetUnfolder]: For 2495/2495 co-relation queries the response was YES. [2021-12-14 16:56:14,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 744 events. 264/744 cut-off events. For 2495/2495 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3693 event pairs, 27 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3200. Up to 448 conditions per place. [2021-12-14 16:56:14,165 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 124 selfloop transitions, 76 changer transitions 44/283 dead transitions. [2021-12-14 16:56:14,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 283 transitions, 2405 flow [2021-12-14 16:56:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-14 16:56:14,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-14 16:56:14,168 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-14 16:56:14,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-14 16:56:14,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:14,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-14 16:56:14,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:14,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:14,174 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:14,174 INFO L186 Difference]: Start difference. First operand has 245 places, 224 transitions, 1536 flow. Second operand 31 states and 1658 transitions. [2021-12-14 16:56:14,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 283 transitions, 2405 flow [2021-12-14 16:56:14,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 283 transitions, 2194 flow, removed 48 selfloop flow, removed 26 redundant places. [2021-12-14 16:56:14,188 INFO L242 Difference]: Finished difference. Result has 255 places, 224 transitions, 1617 flow [2021-12-14 16:56:14,189 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1617, PETRI_PLACES=255, PETRI_TRANSITIONS=224} [2021-12-14 16:56:14,189 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 167 predicate places. [2021-12-14 16:56:14,189 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 224 transitions, 1617 flow [2021-12-14 16:56:14,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:14,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:14,190 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] [2021-12-14 16:56:14,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:56:14,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1783083334, now seen corresponding path program 8 times [2021-12-14 16:56:14,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466490580] [2021-12-14 16:56:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:14,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:14,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466490580] [2021-12-14 16:56:14,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466490580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:14,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:14,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:14,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932085856] [2021-12-14 16:56:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:14,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:14,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:14,471 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:14,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 224 transitions, 1617 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:14,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:14,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:14,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:15,417 INFO L129 PetriNetUnfolder]: 260/739 cut-off events. [2021-12-14 16:56:15,417 INFO L130 PetriNetUnfolder]: For 2601/2601 co-relation queries the response was YES. [2021-12-14 16:56:15,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3344 conditions, 739 events. 260/739 cut-off events. For 2601/2601 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3694 event pairs, 33 based on Foata normal form. 1/738 useless extension candidates. Maximal degree in co-relation 3265. Up to 456 conditions per place. [2021-12-14 16:56:15,424 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 126 selfloop transitions, 73 changer transitions 39/277 dead transitions. [2021-12-14 16:56:15,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 277 transitions, 2429 flow [2021-12-14 16:56:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:56:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:56:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1603 transitions. [2021-12-14 16:56:15,427 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5684397163120567 [2021-12-14 16:56:15,427 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1603 transitions. [2021-12-14 16:56:15,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1603 transitions. [2021-12-14 16:56:15,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:15,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1603 transitions. [2021-12-14 16:56:15,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.43333333333333) internal successors, (1603), 30 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:15,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:15,434 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:15,434 INFO L186 Difference]: Start difference. First operand has 255 places, 224 transitions, 1617 flow. Second operand 30 states and 1603 transitions. [2021-12-14 16:56:15,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 277 transitions, 2429 flow [2021-12-14 16:56:15,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 277 transitions, 2192 flow, removed 35 selfloop flow, removed 29 redundant places. [2021-12-14 16:56:15,452 INFO L242 Difference]: Finished difference. Result has 256 places, 223 transitions, 1629 flow [2021-12-14 16:56:15,453 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1629, PETRI_PLACES=256, PETRI_TRANSITIONS=223} [2021-12-14 16:56:15,454 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-12-14 16:56:15,455 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 223 transitions, 1629 flow [2021-12-14 16:56:15,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:15,455 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:15,455 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] [2021-12-14 16:56:15,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:56:15,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -944030314, now seen corresponding path program 9 times [2021-12-14 16:56:15,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:15,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418982134] [2021-12-14 16:56:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:15,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:15,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:15,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418982134] [2021-12-14 16:56:15,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418982134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:15,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:15,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-14 16:56:15,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156359157] [2021-12-14 16:56:15,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:15,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 16:56:15,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:15,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 16:56:15,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-14 16:56:15,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:15,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 223 transitions, 1629 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:15,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:15,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:15,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:17,441 INFO L129 PetriNetUnfolder]: 261/726 cut-off events. [2021-12-14 16:56:17,442 INFO L130 PetriNetUnfolder]: For 2958/2958 co-relation queries the response was YES. [2021-12-14 16:56:17,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3403 conditions, 726 events. 261/726 cut-off events. For 2958/2958 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3615 event pairs, 28 based on Foata normal form. 1/724 useless extension candidates. Maximal degree in co-relation 3326. Up to 460 conditions per place. [2021-12-14 16:56:17,449 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 129 selfloop transitions, 94 changer transitions 29/291 dead transitions. [2021-12-14 16:56:17,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 291 transitions, 2637 flow [2021-12-14 16:56:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-14 16:56:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-14 16:56:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2205 transitions. [2021-12-14 16:56:17,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2021-12-14 16:56:17,457 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2205 transitions. [2021-12-14 16:56:17,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2205 transitions. [2021-12-14 16:56:17,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:17,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2205 transitions. [2021-12-14 16:56:17,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 52.5) internal successors, (2205), 42 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,477 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 94.0) internal successors, (4042), 43 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,477 INFO L186 Difference]: Start difference. First operand has 256 places, 223 transitions, 1629 flow. Second operand 42 states and 2205 transitions. [2021-12-14 16:56:17,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 291 transitions, 2637 flow [2021-12-14 16:56:17,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 291 transitions, 2381 flow, removed 68 selfloop flow, removed 28 redundant places. [2021-12-14 16:56:17,493 INFO L242 Difference]: Finished difference. Result has 273 places, 244 transitions, 1891 flow [2021-12-14 16:56:17,493 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1891, PETRI_PLACES=273, PETRI_TRANSITIONS=244} [2021-12-14 16:56:17,494 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 185 predicate places. [2021-12-14 16:56:17,494 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 244 transitions, 1891 flow [2021-12-14 16:56:17,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:17,495 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] [2021-12-14 16:56:17,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:56:17,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash -984614164, now seen corresponding path program 10 times [2021-12-14 16:56:17,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:17,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095257225] [2021-12-14 16:56:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:17,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:17,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:17,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095257225] [2021-12-14 16:56:17,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095257225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:17,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:17,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:17,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23652745] [2021-12-14 16:56:17,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:17,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:17,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:17,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:17,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 244 transitions, 1891 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:17,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:17,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:18,884 INFO L129 PetriNetUnfolder]: 261/745 cut-off events. [2021-12-14 16:56:18,884 INFO L130 PetriNetUnfolder]: For 3271/3271 co-relation queries the response was YES. [2021-12-14 16:56:18,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 745 events. 261/745 cut-off events. For 3271/3271 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3789 event pairs, 30 based on Foata normal form. 1/744 useless extension candidates. Maximal degree in co-relation 3521. Up to 477 conditions per place. [2021-12-14 16:56:18,902 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 78 changer transitions 32/287 dead transitions. [2021-12-14 16:56:18,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 287 transitions, 2626 flow [2021-12-14 16:56:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 16:56:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-14 16:56:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1745 transitions. [2021-12-14 16:56:18,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5625402965828498 [2021-12-14 16:56:18,906 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1745 transitions. [2021-12-14 16:56:18,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1745 transitions. [2021-12-14 16:56:18,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:18,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1745 transitions. [2021-12-14 16:56:18,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,911 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,911 INFO L186 Difference]: Start difference. First operand has 273 places, 244 transitions, 1891 flow. Second operand 33 states and 1745 transitions. [2021-12-14 16:56:18,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 287 transitions, 2626 flow [2021-12-14 16:56:18,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 287 transitions, 2308 flow, removed 96 selfloop flow, removed 27 redundant places. [2021-12-14 16:56:18,931 INFO L242 Difference]: Finished difference. Result has 280 places, 241 transitions, 1804 flow [2021-12-14 16:56:18,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1804, PETRI_PLACES=280, PETRI_TRANSITIONS=241} [2021-12-14 16:56:18,934 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 192 predicate places. [2021-12-14 16:56:18,934 INFO L470 AbstractCegarLoop]: Abstraction has has 280 places, 241 transitions, 1804 flow [2021-12-14 16:56:18,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,935 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:18,935 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] [2021-12-14 16:56:18,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:56:18,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:18,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:18,935 INFO L85 PathProgramCache]: Analyzing trace with hash 531479520, now seen corresponding path program 11 times [2021-12-14 16:56:18,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:18,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673586131] [2021-12-14 16:56:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:18,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:19,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:19,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673586131] [2021-12-14 16:56:19,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673586131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:19,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:19,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:19,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169292900] [2021-12-14 16:56:19,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:19,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:19,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:19,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:19,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 241 transitions, 1804 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:19,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:19,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:19,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:20,162 INFO L129 PetriNetUnfolder]: 251/709 cut-off events. [2021-12-14 16:56:20,162 INFO L130 PetriNetUnfolder]: For 2910/2910 co-relation queries the response was YES. [2021-12-14 16:56:20,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3439 conditions, 709 events. 251/709 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3481 event pairs, 22 based on Foata normal form. 1/709 useless extension candidates. Maximal degree in co-relation 3355. Up to 465 conditions per place. [2021-12-14 16:56:20,170 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 134 selfloop transitions, 75 changer transitions 26/274 dead transitions. [2021-12-14 16:56:20,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 274 transitions, 2427 flow [2021-12-14 16:56:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-12-14 16:56:20,172 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-12-14 16:56:20,172 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-12-14 16:56:20,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-12-14 16:56:20,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:20,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-12-14 16:56:20,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,176 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,177 INFO L186 Difference]: Start difference. First operand has 280 places, 241 transitions, 1804 flow. Second operand 31 states and 1639 transitions. [2021-12-14 16:56:20,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 274 transitions, 2427 flow [2021-12-14 16:56:20,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 274 transitions, 2189 flow, removed 25 selfloop flow, removed 33 redundant places. [2021-12-14 16:56:20,194 INFO L242 Difference]: Finished difference. Result has 274 places, 234 transitions, 1729 flow [2021-12-14 16:56:20,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1729, PETRI_PLACES=274, PETRI_TRANSITIONS=234} [2021-12-14 16:56:20,195 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 186 predicate places. [2021-12-14 16:56:20,195 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 234 transitions, 1729 flow [2021-12-14 16:56:20,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:20,195 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] [2021-12-14 16:56:20,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:56:20,196 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash -94536446, now seen corresponding path program 12 times [2021-12-14 16:56:20,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:20,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305688901] [2021-12-14 16:56:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:20,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:20,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:20,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305688901] [2021-12-14 16:56:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305688901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:20,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:20,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 16:56:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781888291] [2021-12-14 16:56:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:20,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:56:20,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:56:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:56:20,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:20,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 234 transitions, 1729 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:20,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:20,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:21,547 INFO L129 PetriNetUnfolder]: 244/703 cut-off events. [2021-12-14 16:56:21,547 INFO L130 PetriNetUnfolder]: For 2607/2607 co-relation queries the response was YES. [2021-12-14 16:56:21,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 703 events. 244/703 cut-off events. For 2607/2607 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3416 event pairs, 26 based on Foata normal form. 1/703 useless extension candidates. Maximal degree in co-relation 3215. Up to 460 conditions per place. [2021-12-14 16:56:21,553 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 130 selfloop transitions, 75 changer transitions 19/263 dead transitions. [2021-12-14 16:56:21,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 263 transitions, 2301 flow [2021-12-14 16:56:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1633 transitions. [2021-12-14 16:56:21,554 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.560398078242965 [2021-12-14 16:56:21,555 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1633 transitions. [2021-12-14 16:56:21,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1633 transitions. [2021-12-14 16:56:21,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:21,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1633 transitions. [2021-12-14 16:56:21,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.67741935483871) internal successors, (1633), 31 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,560 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,560 INFO L186 Difference]: Start difference. First operand has 274 places, 234 transitions, 1729 flow. Second operand 31 states and 1633 transitions. [2021-12-14 16:56:21,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 263 transitions, 2301 flow [2021-12-14 16:56:21,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 263 transitions, 2097 flow, removed 17 selfloop flow, removed 33 redundant places. [2021-12-14 16:56:21,575 INFO L242 Difference]: Finished difference. Result has 267 places, 231 transitions, 1700 flow [2021-12-14 16:56:21,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1700, PETRI_PLACES=267, PETRI_TRANSITIONS=231} [2021-12-14 16:56:21,576 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 179 predicate places. [2021-12-14 16:56:21,576 INFO L470 AbstractCegarLoop]: Abstraction has has 267 places, 231 transitions, 1700 flow [2021-12-14 16:56:21,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,577 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:21,577 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] [2021-12-14 16:56:21,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:56:21,577 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1982707728, now seen corresponding path program 13 times [2021-12-14 16:56:21,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:21,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112605460] [2021-12-14 16:56:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:21,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:21,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:21,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112605460] [2021-12-14 16:56:21,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112605460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:21,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:21,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-14 16:56:21,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111623237] [2021-12-14 16:56:21,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:21,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 16:56:21,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 16:56:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-12-14 16:56:21,925 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:21,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 231 transitions, 1700 flow. Second operand has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:21,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:21,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:23,042 INFO L129 PetriNetUnfolder]: 238/685 cut-off events. [2021-12-14 16:56:23,043 INFO L130 PetriNetUnfolder]: For 2351/2351 co-relation queries the response was YES. [2021-12-14 16:56:23,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 685 events. 238/685 cut-off events. For 2351/2351 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3224 event pairs, 29 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 3103. Up to 452 conditions per place. [2021-12-14 16:56:23,050 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 123 selfloop transitions, 65 changer transitions 26/253 dead transitions. [2021-12-14 16:56:23,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 253 transitions, 2225 flow [2021-12-14 16:56:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 16:56:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-14 16:56:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1677 transitions. [2021-12-14 16:56:23,052 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5575132978723404 [2021-12-14 16:56:23,052 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1677 transitions. [2021-12-14 16:56:23,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1677 transitions. [2021-12-14 16:56:23,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:23,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1677 transitions. [2021-12-14 16:56:23,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.40625) internal successors, (1677), 32 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:23,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:23,057 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:23,057 INFO L186 Difference]: Start difference. First operand has 267 places, 231 transitions, 1700 flow. Second operand 32 states and 1677 transitions. [2021-12-14 16:56:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 253 transitions, 2225 flow [2021-12-14 16:56:23,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 2037 flow, removed 9 selfloop flow, removed 31 redundant places. [2021-12-14 16:56:23,072 INFO L242 Difference]: Finished difference. Result has 264 places, 215 transitions, 1558 flow [2021-12-14 16:56:23,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1558, PETRI_PLACES=264, PETRI_TRANSITIONS=215} [2021-12-14 16:56:23,073 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 176 predicate places. [2021-12-14 16:56:23,073 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 215 transitions, 1558 flow [2021-12-14 16:56:23,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 50.81818181818182) internal successors, (1118), 22 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:23,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:23,074 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] [2021-12-14 16:56:23,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:56:23,074 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:23,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1690499486, now seen corresponding path program 14 times [2021-12-14 16:56:23,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:23,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319989329] [2021-12-14 16:56:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:23,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:23,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:23,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319989329] [2021-12-14 16:56:23,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319989329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:23,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:23,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:23,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748495746] [2021-12-14 16:56:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:23,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:23,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:23,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:23,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 215 transitions, 1558 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:23,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:23,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:23,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:24,473 INFO L129 PetriNetUnfolder]: 260/745 cut-off events. [2021-12-14 16:56:24,473 INFO L130 PetriNetUnfolder]: For 2600/2600 co-relation queries the response was YES. [2021-12-14 16:56:24,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 745 events. 260/745 cut-off events. For 2600/2600 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3749 event pairs, 38 based on Foata normal form. 1/743 useless extension candidates. Maximal degree in co-relation 3287. Up to 436 conditions per place. [2021-12-14 16:56:24,479 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 83 changer transitions 42/284 dead transitions. [2021-12-14 16:56:24,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 284 transitions, 2512 flow [2021-12-14 16:56:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 16:56:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-14 16:56:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1861 transitions. [2021-12-14 16:56:24,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5656534954407295 [2021-12-14 16:56:24,491 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1861 transitions. [2021-12-14 16:56:24,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1861 transitions. [2021-12-14 16:56:24,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:24,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1861 transitions. [2021-12-14 16:56:24,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 53.17142857142857) internal successors, (1861), 35 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:24,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:24,496 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:24,496 INFO L186 Difference]: Start difference. First operand has 264 places, 215 transitions, 1558 flow. Second operand 35 states and 1861 transitions. [2021-12-14 16:56:24,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 284 transitions, 2512 flow [2021-12-14 16:56:24,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 284 transitions, 2221 flow, removed 45 selfloop flow, removed 29 redundant places. [2021-12-14 16:56:24,509 INFO L242 Difference]: Finished difference. Result has 256 places, 224 transitions, 1654 flow [2021-12-14 16:56:24,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1654, PETRI_PLACES=256, PETRI_TRANSITIONS=224} [2021-12-14 16:56:24,510 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 168 predicate places. [2021-12-14 16:56:24,510 INFO L470 AbstractCegarLoop]: Abstraction has has 256 places, 224 transitions, 1654 flow [2021-12-14 16:56:24,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:24,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:24,510 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] [2021-12-14 16:56:24,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:56:24,511 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash -958827984, now seen corresponding path program 15 times [2021-12-14 16:56:24,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480199684] [2021-12-14 16:56:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:24,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:24,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:24,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480199684] [2021-12-14 16:56:24,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480199684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:24,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:24,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:24,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132252498] [2021-12-14 16:56:24,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:24,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:24,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:24,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:24,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:24,816 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:24,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 224 transitions, 1654 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:24,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:24,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:24,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:25,822 INFO L129 PetriNetUnfolder]: 272/766 cut-off events. [2021-12-14 16:56:25,822 INFO L130 PetriNetUnfolder]: For 3723/3723 co-relation queries the response was YES. [2021-12-14 16:56:25,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3677 conditions, 766 events. 272/766 cut-off events. For 3723/3723 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3741 event pairs, 23 based on Foata normal form. 1/764 useless extension candidates. Maximal degree in co-relation 3600. Up to 458 conditions per place. [2021-12-14 16:56:25,830 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 138 selfloop transitions, 101 changer transitions 22/300 dead transitions. [2021-12-14 16:56:25,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 300 transitions, 2850 flow [2021-12-14 16:56:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 16:56:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-14 16:56:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1818 transitions. [2021-12-14 16:56:25,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5688360450563203 [2021-12-14 16:56:25,832 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1818 transitions. [2021-12-14 16:56:25,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1818 transitions. [2021-12-14 16:56:25,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:25,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1818 transitions. [2021-12-14 16:56:25,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.470588235294116) internal successors, (1818), 34 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:25,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:25,837 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:25,837 INFO L186 Difference]: Start difference. First operand has 256 places, 224 transitions, 1654 flow. Second operand 34 states and 1818 transitions. [2021-12-14 16:56:25,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 300 transitions, 2850 flow [2021-12-14 16:56:25,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 300 transitions, 2572 flow, removed 73 selfloop flow, removed 29 redundant places. [2021-12-14 16:56:25,855 INFO L242 Difference]: Finished difference. Result has 260 places, 251 transitions, 2016 flow [2021-12-14 16:56:25,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2016, PETRI_PLACES=260, PETRI_TRANSITIONS=251} [2021-12-14 16:56:25,856 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 172 predicate places. [2021-12-14 16:56:25,856 INFO L470 AbstractCegarLoop]: Abstraction has has 260 places, 251 transitions, 2016 flow [2021-12-14 16:56:25,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:25,857 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:25,857 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] [2021-12-14 16:56:25,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:56:25,857 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:25,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2084111022, now seen corresponding path program 16 times [2021-12-14 16:56:25,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:25,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177778700] [2021-12-14 16:56:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:25,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:26,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:26,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177778700] [2021-12-14 16:56:26,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177778700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:26,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:26,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-14 16:56:26,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439761553] [2021-12-14 16:56:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:26,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 16:56:26,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 16:56:26,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:56:26,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:26,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 251 transitions, 2016 flow. Second operand has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:26,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:26,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:26,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:27,150 INFO L129 PetriNetUnfolder]: 280/785 cut-off events. [2021-12-14 16:56:27,150 INFO L130 PetriNetUnfolder]: For 3920/3920 co-relation queries the response was YES. [2021-12-14 16:56:27,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 785 events. 280/785 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3957 event pairs, 24 based on Foata normal form. 1/783 useless extension candidates. Maximal degree in co-relation 3839. Up to 487 conditions per place. [2021-12-14 16:56:27,162 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 89 changer transitions 29/308 dead transitions. [2021-12-14 16:56:27,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 308 transitions, 3040 flow [2021-12-14 16:56:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 16:56:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-14 16:56:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1560 transitions. [2021-12-14 16:56:27,164 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5722670579603815 [2021-12-14 16:56:27,164 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1560 transitions. [2021-12-14 16:56:27,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1560 transitions. [2021-12-14 16:56:27,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:27,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1560 transitions. [2021-12-14 16:56:27,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.793103448275865) internal successors, (1560), 29 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:27,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:27,169 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:27,170 INFO L186 Difference]: Start difference. First operand has 260 places, 251 transitions, 2016 flow. Second operand 29 states and 1560 transitions. [2021-12-14 16:56:27,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 308 transitions, 3040 flow [2021-12-14 16:56:27,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 308 transitions, 2719 flow, removed 122 selfloop flow, removed 14 redundant places. [2021-12-14 16:56:27,192 INFO L242 Difference]: Finished difference. Result has 278 places, 259 transitions, 2077 flow [2021-12-14 16:56:27,193 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2077, PETRI_PLACES=278, PETRI_TRANSITIONS=259} [2021-12-14 16:56:27,193 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 190 predicate places. [2021-12-14 16:56:27,193 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 259 transitions, 2077 flow [2021-12-14 16:56:27,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 51.22222222222222) internal successors, (922), 18 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:27,194 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:27,194 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] [2021-12-14 16:56:27,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:56:27,194 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:27,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash 331956586, now seen corresponding path program 17 times [2021-12-14 16:56:27,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:27,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073067233] [2021-12-14 16:56:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:27,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:27,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073067233] [2021-12-14 16:56:27,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073067233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:27,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:27,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:27,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970577694] [2021-12-14 16:56:27,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:27,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:27,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:27,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:27,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:27,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 259 transitions, 2077 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:27,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:27,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:27,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:28,473 INFO L129 PetriNetUnfolder]: 278/780 cut-off events. [2021-12-14 16:56:28,474 INFO L130 PetriNetUnfolder]: For 4197/4197 co-relation queries the response was YES. [2021-12-14 16:56:28,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3994 conditions, 780 events. 278/780 cut-off events. For 4197/4197 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3900 event pairs, 25 based on Foata normal form. 1/778 useless extension candidates. Maximal degree in co-relation 3910. Up to 483 conditions per place. [2021-12-14 16:56:28,482 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 149 selfloop transitions, 85 changer transitions 35/308 dead transitions. [2021-12-14 16:56:28,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 308 transitions, 3007 flow [2021-12-14 16:56:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-14 16:56:28,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-14 16:56:28,489 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-14 16:56:28,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-14 16:56:28,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:28,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-14 16:56:28,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:28,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:28,493 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:28,493 INFO L186 Difference]: Start difference. First operand has 278 places, 259 transitions, 2077 flow. Second operand 31 states and 1658 transitions. [2021-12-14 16:56:28,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 308 transitions, 3007 flow [2021-12-14 16:56:28,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 308 transitions, 2721 flow, removed 64 selfloop flow, removed 27 redundant places. [2021-12-14 16:56:28,515 INFO L242 Difference]: Finished difference. Result has 286 places, 256 transitions, 2053 flow [2021-12-14 16:56:28,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2053, PETRI_PLACES=286, PETRI_TRANSITIONS=256} [2021-12-14 16:56:28,516 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-12-14 16:56:28,516 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 256 transitions, 2053 flow [2021-12-14 16:56:28,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:28,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:28,516 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] [2021-12-14 16:56:28,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:56:28,517 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1742136890, now seen corresponding path program 18 times [2021-12-14 16:56:28,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:28,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302571875] [2021-12-14 16:56:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:28,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:28,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302571875] [2021-12-14 16:56:28,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302571875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:28,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:28,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:28,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358623092] [2021-12-14 16:56:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:28,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:28,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:28,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:28,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 256 transitions, 2053 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:28,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:28,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:28,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:29,841 INFO L129 PetriNetUnfolder]: 274/768 cut-off events. [2021-12-14 16:56:29,842 INFO L130 PetriNetUnfolder]: For 3942/3942 co-relation queries the response was YES. [2021-12-14 16:56:29,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3953 conditions, 768 events. 274/768 cut-off events. For 3942/3942 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3827 event pairs, 24 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3868. Up to 481 conditions per place. [2021-12-14 16:56:29,848 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 147 selfloop transitions, 92 changer transitions 26/304 dead transitions. [2021-12-14 16:56:29,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 304 transitions, 2973 flow [2021-12-14 16:56:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:56:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:56:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1606 transitions. [2021-12-14 16:56:29,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5695035460992908 [2021-12-14 16:56:29,850 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1606 transitions. [2021-12-14 16:56:29,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1606 transitions. [2021-12-14 16:56:29,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:29,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1606 transitions. [2021-12-14 16:56:29,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.53333333333333) internal successors, (1606), 30 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:29,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:29,854 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:29,854 INFO L186 Difference]: Start difference. First operand has 286 places, 256 transitions, 2053 flow. Second operand 30 states and 1606 transitions. [2021-12-14 16:56:29,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 304 transitions, 2973 flow [2021-12-14 16:56:29,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 2719 flow, removed 24 selfloop flow, removed 28 redundant places. [2021-12-14 16:56:29,874 INFO L242 Difference]: Finished difference. Result has 286 places, 259 transitions, 2104 flow [2021-12-14 16:56:29,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2104, PETRI_PLACES=286, PETRI_TRANSITIONS=259} [2021-12-14 16:56:29,875 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 198 predicate places. [2021-12-14 16:56:29,876 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 259 transitions, 2104 flow [2021-12-14 16:56:29,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:29,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:29,876 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] [2021-12-14 16:56:29,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:56:29,876 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2093389318, now seen corresponding path program 19 times [2021-12-14 16:56:29,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:29,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153232903] [2021-12-14 16:56:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:29,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:30,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153232903] [2021-12-14 16:56:30,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153232903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:30,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:30,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:30,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287625098] [2021-12-14 16:56:30,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:30,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:30,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:30,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:30,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 259 transitions, 2104 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:30,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:30,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:30,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:31,192 INFO L129 PetriNetUnfolder]: 280/787 cut-off events. [2021-12-14 16:56:31,192 INFO L130 PetriNetUnfolder]: For 4345/4345 co-relation queries the response was YES. [2021-12-14 16:56:31,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 787 events. 280/787 cut-off events. For 4345/4345 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4001 event pairs, 26 based on Foata normal form. 1/784 useless extension candidates. Maximal degree in co-relation 4008. Up to 511 conditions per place. [2021-12-14 16:56:31,199 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 78 changer transitions 30/312 dead transitions. [2021-12-14 16:56:31,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 312 transitions, 3125 flow [2021-12-14 16:56:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:31,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1651 transitions. [2021-12-14 16:56:31,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5665751544269046 [2021-12-14 16:56:31,201 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1651 transitions. [2021-12-14 16:56:31,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1651 transitions. [2021-12-14 16:56:31,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:31,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1651 transitions. [2021-12-14 16:56:31,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.25806451612903) internal successors, (1651), 31 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:31,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:31,205 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:31,205 INFO L186 Difference]: Start difference. First operand has 286 places, 259 transitions, 2104 flow. Second operand 31 states and 1651 transitions. [2021-12-14 16:56:31,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 312 transitions, 3125 flow [2021-12-14 16:56:31,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 312 transitions, 2890 flow, removed 47 selfloop flow, removed 26 redundant places. [2021-12-14 16:56:31,225 INFO L242 Difference]: Finished difference. Result has 297 places, 266 transitions, 2244 flow [2021-12-14 16:56:31,226 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2244, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2021-12-14 16:56:31,226 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 209 predicate places. [2021-12-14 16:56:31,226 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 2244 flow [2021-12-14 16:56:31,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:31,226 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:31,227 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] [2021-12-14 16:56:31,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:56:31,227 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1511959520, now seen corresponding path program 20 times [2021-12-14 16:56:31,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:31,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931321341] [2021-12-14 16:56:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:31,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:31,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931321341] [2021-12-14 16:56:31,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931321341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:31,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:31,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:31,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656072286] [2021-12-14 16:56:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:31,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:31,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:31,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:31,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 2244 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:31,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:31,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:31,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:32,566 INFO L129 PetriNetUnfolder]: 278/777 cut-off events. [2021-12-14 16:56:32,566 INFO L130 PetriNetUnfolder]: For 4500/4500 co-relation queries the response was YES. [2021-12-14 16:56:32,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 777 events. 278/777 cut-off events. For 4500/4500 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3913 event pairs, 24 based on Foata normal form. 1/774 useless extension candidates. Maximal degree in co-relation 4055. Up to 503 conditions per place. [2021-12-14 16:56:32,574 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 155 selfloop transitions, 86 changer transitions 30/310 dead transitions. [2021-12-14 16:56:32,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 310 transitions, 3174 flow [2021-12-14 16:56:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 16:56:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-14 16:56:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1701 transitions. [2021-12-14 16:56:32,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5654920212765957 [2021-12-14 16:56:32,576 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1701 transitions. [2021-12-14 16:56:32,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1701 transitions. [2021-12-14 16:56:32,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:32,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1701 transitions. [2021-12-14 16:56:32,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.15625) internal successors, (1701), 32 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:32,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:32,580 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:32,580 INFO L186 Difference]: Start difference. First operand has 297 places, 266 transitions, 2244 flow. Second operand 32 states and 1701 transitions. [2021-12-14 16:56:32,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 310 transitions, 3174 flow [2021-12-14 16:56:32,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 310 transitions, 2977 flow, removed 39 selfloop flow, removed 26 redundant places. [2021-12-14 16:56:32,603 INFO L242 Difference]: Finished difference. Result has 304 places, 264 transitions, 2304 flow [2021-12-14 16:56:32,604 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2304, PETRI_PLACES=304, PETRI_TRANSITIONS=264} [2021-12-14 16:56:32,604 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 216 predicate places. [2021-12-14 16:56:32,604 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 264 transitions, 2304 flow [2021-12-14 16:56:32,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:32,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:32,604 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] [2021-12-14 16:56:32,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:56:32,605 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2051343124, now seen corresponding path program 21 times [2021-12-14 16:56:32,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:32,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999008239] [2021-12-14 16:56:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:32,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:32,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:32,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999008239] [2021-12-14 16:56:32,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999008239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:32,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:32,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:32,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206835641] [2021-12-14 16:56:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:32,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:32,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:32,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:32,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 264 transitions, 2304 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:32,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:32,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:32,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:33,892 INFO L129 PetriNetUnfolder]: 281/795 cut-off events. [2021-12-14 16:56:33,893 INFO L130 PetriNetUnfolder]: For 4956/4956 co-relation queries the response was YES. [2021-12-14 16:56:33,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4288 conditions, 795 events. 281/795 cut-off events. For 4956/4956 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4026 event pairs, 23 based on Foata normal form. 1/792 useless extension candidates. Maximal degree in co-relation 4196. Up to 476 conditions per place. [2021-12-14 16:56:33,899 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 151 selfloop transitions, 115 changer transitions 20/325 dead transitions. [2021-12-14 16:56:33,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 325 transitions, 3423 flow [2021-12-14 16:56:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 16:56:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-14 16:56:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1817 transitions. [2021-12-14 16:56:33,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.568523153942428 [2021-12-14 16:56:33,901 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1817 transitions. [2021-12-14 16:56:33,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1817 transitions. [2021-12-14 16:56:33,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:33,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1817 transitions. [2021-12-14 16:56:33,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 53.44117647058823) internal successors, (1817), 34 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:33,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:33,909 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 94.0) internal successors, (3290), 35 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:33,909 INFO L186 Difference]: Start difference. First operand has 304 places, 264 transitions, 2304 flow. Second operand 34 states and 1817 transitions. [2021-12-14 16:56:33,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 325 transitions, 3423 flow [2021-12-14 16:56:33,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 325 transitions, 3154 flow, removed 63 selfloop flow, removed 30 redundant places. [2021-12-14 16:56:33,932 INFO L242 Difference]: Finished difference. Result has 308 places, 280 transitions, 2581 flow [2021-12-14 16:56:33,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2581, PETRI_PLACES=308, PETRI_TRANSITIONS=280} [2021-12-14 16:56:33,933 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 220 predicate places. [2021-12-14 16:56:33,933 INFO L470 AbstractCegarLoop]: Abstraction has has 308 places, 280 transitions, 2581 flow [2021-12-14 16:56:33,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:33,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:33,933 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] [2021-12-14 16:56:33,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:56:33,933 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1916503756, now seen corresponding path program 22 times [2021-12-14 16:56:33,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:33,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592609214] [2021-12-14 16:56:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:33,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:34,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592609214] [2021-12-14 16:56:34,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592609214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:34,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:34,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:34,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149895225] [2021-12-14 16:56:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:34,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:34,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:34,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:34,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 280 transitions, 2581 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:34,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:34,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:34,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:35,371 INFO L129 PetriNetUnfolder]: 284/809 cut-off events. [2021-12-14 16:56:35,372 INFO L130 PetriNetUnfolder]: For 4572/4572 co-relation queries the response was YES. [2021-12-14 16:56:35,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4446 conditions, 809 events. 284/809 cut-off events. For 4572/4572 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4138 event pairs, 18 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 4352. Up to 513 conditions per place. [2021-12-14 16:56:35,384 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 165 selfloop transitions, 102 changer transitions 21/327 dead transitions. [2021-12-14 16:56:35,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 327 transitions, 3543 flow [2021-12-14 16:56:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 16:56:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-14 16:56:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2021-12-14 16:56:35,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2021-12-14 16:56:35,387 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2021-12-14 16:56:35,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2021-12-14 16:56:35,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:35,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2021-12-14 16:56:35,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:35,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:35,392 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:35,392 INFO L186 Difference]: Start difference. First operand has 308 places, 280 transitions, 2581 flow. Second operand 33 states and 1758 transitions. [2021-12-14 16:56:35,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 327 transitions, 3543 flow [2021-12-14 16:56:35,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 327 transitions, 3330 flow, removed 47 selfloop flow, removed 21 redundant places. [2021-12-14 16:56:35,422 INFO L242 Difference]: Finished difference. Result has 324 places, 286 transitions, 2726 flow [2021-12-14 16:56:35,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2726, PETRI_PLACES=324, PETRI_TRANSITIONS=286} [2021-12-14 16:56:35,424 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 236 predicate places. [2021-12-14 16:56:35,424 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 286 transitions, 2726 flow [2021-12-14 16:56:35,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:35,424 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:35,424 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] [2021-12-14 16:56:35,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:56:35,425 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:35,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash 31959134, now seen corresponding path program 23 times [2021-12-14 16:56:35,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:35,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960039540] [2021-12-14 16:56:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:35,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:35,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:35,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960039540] [2021-12-14 16:56:35,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960039540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:35,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:35,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:35,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268797776] [2021-12-14 16:56:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:35,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:35,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:35,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:35,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:35,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:35,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 286 transitions, 2726 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:35,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:35,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:35,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:36,642 INFO L129 PetriNetUnfolder]: 278/795 cut-off events. [2021-12-14 16:56:36,642 INFO L130 PetriNetUnfolder]: For 5015/5015 co-relation queries the response was YES. [2021-12-14 16:56:36,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 795 events. 278/795 cut-off events. For 5015/5015 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4101 event pairs, 18 based on Foata normal form. 1/793 useless extension candidates. Maximal degree in co-relation 4419. Up to 491 conditions per place. [2021-12-14 16:56:36,651 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 156 selfloop transitions, 104 changer transitions 26/325 dead transitions. [2021-12-14 16:56:36,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 325 transitions, 3580 flow [2021-12-14 16:56:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1658 transitions. [2021-12-14 16:56:36,657 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5689773507206589 [2021-12-14 16:56:36,657 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1658 transitions. [2021-12-14 16:56:36,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1658 transitions. [2021-12-14 16:56:36,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:36,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1658 transitions. [2021-12-14 16:56:36,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.483870967741936) internal successors, (1658), 31 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:36,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:36,661 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:36,661 INFO L186 Difference]: Start difference. First operand has 324 places, 286 transitions, 2726 flow. Second operand 31 states and 1658 transitions. [2021-12-14 16:56:36,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 325 transitions, 3580 flow [2021-12-14 16:56:36,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 325 transitions, 3376 flow, removed 33 selfloop flow, removed 27 redundant places. [2021-12-14 16:56:36,710 INFO L242 Difference]: Finished difference. Result has 328 places, 278 transitions, 2727 flow [2021-12-14 16:56:36,710 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2727, PETRI_PLACES=328, PETRI_TRANSITIONS=278} [2021-12-14 16:56:36,710 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 240 predicate places. [2021-12-14 16:56:36,711 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 278 transitions, 2727 flow [2021-12-14 16:56:36,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:36,711 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:36,711 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] [2021-12-14 16:56:36,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:56:36,711 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:36,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:36,712 INFO L85 PathProgramCache]: Analyzing trace with hash 608355172, now seen corresponding path program 24 times [2021-12-14 16:56:36,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:36,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443188898] [2021-12-14 16:56:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:36,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:36,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:36,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443188898] [2021-12-14 16:56:36,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443188898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:36,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:36,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:36,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240419587] [2021-12-14 16:56:36,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:36,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:36,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:36,979 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:36,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 278 transitions, 2727 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:36,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:36,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:36,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:38,203 INFO L129 PetriNetUnfolder]: 271/784 cut-off events. [2021-12-14 16:56:38,204 INFO L130 PetriNetUnfolder]: For 4867/4867 co-relation queries the response was YES. [2021-12-14 16:56:38,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 784 events. 271/784 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4016 event pairs, 20 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 4401. Up to 508 conditions per place. [2021-12-14 16:56:38,212 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 162 selfloop transitions, 92 changer transitions 18/311 dead transitions. [2021-12-14 16:56:38,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 311 transitions, 3473 flow [2021-12-14 16:56:38,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:56:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:56:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1597 transitions. [2021-12-14 16:56:38,214 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5663120567375887 [2021-12-14 16:56:38,214 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1597 transitions. [2021-12-14 16:56:38,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1597 transitions. [2021-12-14 16:56:38,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:38,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1597 transitions. [2021-12-14 16:56:38,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.233333333333334) internal successors, (1597), 30 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:38,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:38,218 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:38,218 INFO L186 Difference]: Start difference. First operand has 328 places, 278 transitions, 2727 flow. Second operand 30 states and 1597 transitions. [2021-12-14 16:56:38,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 311 transitions, 3473 flow [2021-12-14 16:56:38,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 311 transitions, 3185 flow, removed 17 selfloop flow, removed 31 redundant places. [2021-12-14 16:56:38,244 INFO L242 Difference]: Finished difference. Result has 322 places, 275 transitions, 2649 flow [2021-12-14 16:56:38,245 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2649, PETRI_PLACES=322, PETRI_TRANSITIONS=275} [2021-12-14 16:56:38,245 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 234 predicate places. [2021-12-14 16:56:38,245 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 275 transitions, 2649 flow [2021-12-14 16:56:38,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:38,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:38,246 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] [2021-12-14 16:56:38,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:56:38,246 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:38,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1450990916, now seen corresponding path program 25 times [2021-12-14 16:56:38,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:38,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237985583] [2021-12-14 16:56:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:38,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:38,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237985583] [2021-12-14 16:56:38,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237985583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:38,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:38,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030272368] [2021-12-14 16:56:38,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:38,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:38,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:38,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:38,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 275 transitions, 2649 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:38,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:38,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:38,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:39,711 INFO L129 PetriNetUnfolder]: 278/802 cut-off events. [2021-12-14 16:56:39,711 INFO L130 PetriNetUnfolder]: For 5200/5200 co-relation queries the response was YES. [2021-12-14 16:56:39,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4589 conditions, 802 events. 278/802 cut-off events. For 5200/5200 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4112 event pairs, 18 based on Foata normal form. 1/801 useless extension candidates. Maximal degree in co-relation 4490. Up to 501 conditions per place. [2021-12-14 16:56:39,719 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 157 selfloop transitions, 105 changer transitions 21/322 dead transitions. [2021-12-14 16:56:39,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 322 transitions, 3642 flow [2021-12-14 16:56:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 16:56:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-14 16:56:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1756 transitions. [2021-12-14 16:56:39,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.56608639587363 [2021-12-14 16:56:39,721 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1756 transitions. [2021-12-14 16:56:39,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1756 transitions. [2021-12-14 16:56:39,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:39,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1756 transitions. [2021-12-14 16:56:39,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.21212121212121) internal successors, (1756), 33 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,725 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,725 INFO L186 Difference]: Start difference. First operand has 322 places, 275 transitions, 2649 flow. Second operand 33 states and 1756 transitions. [2021-12-14 16:56:39,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 322 transitions, 3642 flow [2021-12-14 16:56:39,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 322 transitions, 3376 flow, removed 21 selfloop flow, removed 31 redundant places. [2021-12-14 16:56:39,753 INFO L242 Difference]: Finished difference. Result has 326 places, 281 transitions, 2779 flow [2021-12-14 16:56:39,753 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2779, PETRI_PLACES=326, PETRI_TRANSITIONS=281} [2021-12-14 16:56:39,753 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 238 predicate places. [2021-12-14 16:56:39,754 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 281 transitions, 2779 flow [2021-12-14 16:56:39,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:39,754 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] [2021-12-14 16:56:39,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:56:39,754 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -914775274, now seen corresponding path program 26 times [2021-12-14 16:56:39,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:39,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799401890] [2021-12-14 16:56:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:39,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:40,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799401890] [2021-12-14 16:56:40,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799401890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:40,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:40,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:40,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47424045] [2021-12-14 16:56:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:40,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:40,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:40,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:40,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:40,042 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:40,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 281 transitions, 2779 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:40,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:40,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:40,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:41,158 INFO L129 PetriNetUnfolder]: 271/797 cut-off events. [2021-12-14 16:56:41,159 INFO L130 PetriNetUnfolder]: For 5483/5483 co-relation queries the response was YES. [2021-12-14 16:56:41,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 797 events. 271/797 cut-off events. For 5483/5483 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4149 event pairs, 22 based on Foata normal form. 1/795 useless extension candidates. Maximal degree in co-relation 4496. Up to 511 conditions per place. [2021-12-14 16:56:41,167 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 161 selfloop transitions, 96 changer transitions 18/314 dead transitions. [2021-12-14 16:56:41,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 314 transitions, 3533 flow [2021-12-14 16:56:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1647 transitions. [2021-12-14 16:56:41,169 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5652024708304736 [2021-12-14 16:56:41,169 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1647 transitions. [2021-12-14 16:56:41,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1647 transitions. [2021-12-14 16:56:41,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:41,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1647 transitions. [2021-12-14 16:56:41,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 53.12903225806452) internal successors, (1647), 31 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:41,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:41,173 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:41,173 INFO L186 Difference]: Start difference. First operand has 326 places, 281 transitions, 2779 flow. Second operand 31 states and 1647 transitions. [2021-12-14 16:56:41,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 314 transitions, 3533 flow [2021-12-14 16:56:41,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 314 transitions, 3325 flow, removed 39 selfloop flow, removed 26 redundant places. [2021-12-14 16:56:41,205 INFO L242 Difference]: Finished difference. Result has 331 places, 278 transitions, 2788 flow [2021-12-14 16:56:41,206 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2788, PETRI_PLACES=331, PETRI_TRANSITIONS=278} [2021-12-14 16:56:41,207 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 243 predicate places. [2021-12-14 16:56:41,207 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 278 transitions, 2788 flow [2021-12-14 16:56:41,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:41,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:41,208 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] [2021-12-14 16:56:41,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 16:56:41,208 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2013754086, now seen corresponding path program 27 times [2021-12-14 16:56:41,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:41,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425476023] [2021-12-14 16:56:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:41,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:41,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425476023] [2021-12-14 16:56:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425476023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:41,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:41,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:41,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341977287] [2021-12-14 16:56:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:41,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:41,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:41,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:41,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:41,539 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:41,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 278 transitions, 2788 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:41,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:41,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:41,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:42,675 INFO L129 PetriNetUnfolder]: 278/817 cut-off events. [2021-12-14 16:56:42,675 INFO L130 PetriNetUnfolder]: For 5596/5596 co-relation queries the response was YES. [2021-12-14 16:56:42,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 817 events. 278/817 cut-off events. For 5596/5596 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4247 event pairs, 19 based on Foata normal form. 1/816 useless extension candidates. Maximal degree in co-relation 4647. Up to 536 conditions per place. [2021-12-14 16:56:42,684 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 178 selfloop transitions, 84 changer transitions 21/322 dead transitions. [2021-12-14 16:56:42,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 322 transitions, 3757 flow [2021-12-14 16:56:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 16:56:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-14 16:56:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1748 transitions. [2021-12-14 16:56:42,685 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5635074145712443 [2021-12-14 16:56:42,686 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1748 transitions. [2021-12-14 16:56:42,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1748 transitions. [2021-12-14 16:56:42,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:42,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1748 transitions. [2021-12-14 16:56:42,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.96969696969697) internal successors, (1748), 33 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:42,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:42,689 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:42,689 INFO L186 Difference]: Start difference. First operand has 331 places, 278 transitions, 2788 flow. Second operand 33 states and 1748 transitions. [2021-12-14 16:56:42,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 322 transitions, 3757 flow [2021-12-14 16:56:42,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 322 transitions, 3429 flow, removed 29 selfloop flow, removed 33 redundant places. [2021-12-14 16:56:42,722 INFO L242 Difference]: Finished difference. Result has 333 places, 284 transitions, 2794 flow [2021-12-14 16:56:42,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2794, PETRI_PLACES=333, PETRI_TRANSITIONS=284} [2021-12-14 16:56:42,723 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-14 16:56:42,723 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 284 transitions, 2794 flow [2021-12-14 16:56:42,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:42,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:42,723 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] [2021-12-14 16:56:42,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 16:56:42,723 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2005848438, now seen corresponding path program 28 times [2021-12-14 16:56:42,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:42,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291835602] [2021-12-14 16:56:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:42,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:43,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:43,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291835602] [2021-12-14 16:56:43,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291835602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:43,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:43,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:43,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40129692] [2021-12-14 16:56:43,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:43,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:43,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:43,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:43,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 284 transitions, 2794 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:43,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:43,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:43,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:44,059 INFO L129 PetriNetUnfolder]: 271/808 cut-off events. [2021-12-14 16:56:44,060 INFO L130 PetriNetUnfolder]: For 5581/5581 co-relation queries the response was YES. [2021-12-14 16:56:44,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 808 events. 271/808 cut-off events. For 5581/5581 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4249 event pairs, 21 based on Foata normal form. 1/806 useless extension candidates. Maximal degree in co-relation 4515. Up to 540 conditions per place. [2021-12-14 16:56:44,066 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 179 selfloop transitions, 78 changer transitions 18/314 dead transitions. [2021-12-14 16:56:44,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 314 transitions, 3522 flow [2021-12-14 16:56:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:56:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:56:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1639 transitions. [2021-12-14 16:56:44,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5624571036376115 [2021-12-14 16:56:44,076 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1639 transitions. [2021-12-14 16:56:44,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1639 transitions. [2021-12-14 16:56:44,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:44,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1639 transitions. [2021-12-14 16:56:44,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:44,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:44,079 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 94.0) internal successors, (3008), 32 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:44,080 INFO L186 Difference]: Start difference. First operand has 333 places, 284 transitions, 2794 flow. Second operand 31 states and 1639 transitions. [2021-12-14 16:56:44,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 314 transitions, 3522 flow [2021-12-14 16:56:44,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 314 transitions, 3340 flow, removed 33 selfloop flow, removed 26 redundant places. [2021-12-14 16:56:44,109 INFO L242 Difference]: Finished difference. Result has 338 places, 281 transitions, 2759 flow [2021-12-14 16:56:44,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2620, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2759, PETRI_PLACES=338, PETRI_TRANSITIONS=281} [2021-12-14 16:56:44,110 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 250 predicate places. [2021-12-14 16:56:44,110 INFO L470 AbstractCegarLoop]: Abstraction has has 338 places, 281 transitions, 2759 flow [2021-12-14 16:56:44,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:44,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:44,111 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:44,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 16:56:44,111 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 924134558, now seen corresponding path program 29 times [2021-12-14 16:56:44,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:44,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614229436] [2021-12-14 16:56:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:44,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:44,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614229436] [2021-12-14 16:56:44,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614229436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:44,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:44,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:44,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526737667] [2021-12-14 16:56:44,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:44,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:44,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:44,403 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:44,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 281 transitions, 2759 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:44,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:44,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:44,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:45,326 INFO L129 PetriNetUnfolder]: 271/815 cut-off events. [2021-12-14 16:56:45,327 INFO L130 PetriNetUnfolder]: For 5692/5692 co-relation queries the response was YES. [2021-12-14 16:56:45,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 815 events. 271/815 cut-off events. For 5692/5692 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4285 event pairs, 19 based on Foata normal form. 1/813 useless extension candidates. Maximal degree in co-relation 4579. Up to 486 conditions per place. [2021-12-14 16:56:45,334 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 154 selfloop transitions, 115 changer transitions 21/329 dead transitions. [2021-12-14 16:56:45,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 329 transitions, 3793 flow [2021-12-14 16:56:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 16:56:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-14 16:56:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1555 transitions. [2021-12-14 16:56:45,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5704328686720469 [2021-12-14 16:56:45,340 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1555 transitions. [2021-12-14 16:56:45,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1555 transitions. [2021-12-14 16:56:45,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:45,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1555 transitions. [2021-12-14 16:56:45,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 53.62068965517241) internal successors, (1555), 29 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:45,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:45,343 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 94.0) internal successors, (2820), 30 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:45,343 INFO L186 Difference]: Start difference. First operand has 338 places, 281 transitions, 2759 flow. Second operand 29 states and 1555 transitions. [2021-12-14 16:56:45,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 329 transitions, 3793 flow [2021-12-14 16:56:45,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 329 transitions, 3575 flow, removed 16 selfloop flow, removed 32 redundant places. [2021-12-14 16:56:45,372 INFO L242 Difference]: Finished difference. Result has 333 places, 286 transitions, 2919 flow [2021-12-14 16:56:45,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2919, PETRI_PLACES=333, PETRI_TRANSITIONS=286} [2021-12-14 16:56:45,373 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-14 16:56:45,373 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 286 transitions, 2919 flow [2021-12-14 16:56:45,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:45,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:45,373 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] [2021-12-14 16:56:45,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-14 16:56:45,374 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash -439693616, now seen corresponding path program 30 times [2021-12-14 16:56:45,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:45,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365668724] [2021-12-14 16:56:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:45,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:45,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365668724] [2021-12-14 16:56:45,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365668724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:45,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:45,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:45,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56915693] [2021-12-14 16:56:45,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:45,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:45,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:45,643 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:45,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 286 transitions, 2919 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:45,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:45,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:45,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:46,569 INFO L129 PetriNetUnfolder]: 271/790 cut-off events. [2021-12-14 16:56:46,569 INFO L130 PetriNetUnfolder]: For 6066/6066 co-relation queries the response was YES. [2021-12-14 16:56:46,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 790 events. 271/790 cut-off events. For 6066/6066 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4015 event pairs, 19 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 4592. Up to 474 conditions per place. [2021-12-14 16:56:46,577 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 152 selfloop transitions, 119 changer transitions 17/327 dead transitions. [2021-12-14 16:56:46,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 327 transitions, 3830 flow [2021-12-14 16:56:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 16:56:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-14 16:56:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1758 transitions. [2021-12-14 16:56:46,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2021-12-14 16:56:46,578 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1758 transitions. [2021-12-14 16:56:46,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1758 transitions. [2021-12-14 16:56:46,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:46,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1758 transitions. [2021-12-14 16:56:46,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 53.27272727272727) internal successors, (1758), 33 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:46,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:46,582 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:46,582 INFO L186 Difference]: Start difference. First operand has 333 places, 286 transitions, 2919 flow. Second operand 33 states and 1758 transitions. [2021-12-14 16:56:46,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 327 transitions, 3830 flow [2021-12-14 16:56:46,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 327 transitions, 3458 flow, removed 60 selfloop flow, removed 28 redundant places. [2021-12-14 16:56:46,617 INFO L242 Difference]: Finished difference. Result has 338 places, 288 transitions, 2900 flow [2021-12-14 16:56:46,617 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2900, PETRI_PLACES=338, PETRI_TRANSITIONS=288} [2021-12-14 16:56:46,618 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 250 predicate places. [2021-12-14 16:56:46,618 INFO L470 AbstractCegarLoop]: Abstraction has has 338 places, 288 transitions, 2900 flow [2021-12-14 16:56:46,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:46,619 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:46,619 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] [2021-12-14 16:56:46,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-14 16:56:46,619 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1178169136, now seen corresponding path program 31 times [2021-12-14 16:56:46,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:46,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616717698] [2021-12-14 16:56:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:46,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:46,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616717698] [2021-12-14 16:56:46,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616717698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:46,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:46,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:46,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520023325] [2021-12-14 16:56:46,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:46,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:46,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:46,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:46,913 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:46,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 288 transitions, 2900 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:46,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:46,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:46,914 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:48,012 INFO L129 PetriNetUnfolder]: 269/783 cut-off events. [2021-12-14 16:56:48,013 INFO L130 PetriNetUnfolder]: For 4995/4995 co-relation queries the response was YES. [2021-12-14 16:56:48,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 783 events. 269/783 cut-off events. For 4995/4995 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3948 event pairs, 20 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 4421. Up to 474 conditions per place. [2021-12-14 16:56:48,020 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 150 selfloop transitions, 109 changer transitions 25/323 dead transitions. [2021-12-14 16:56:48,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 323 transitions, 3727 flow [2021-12-14 16:56:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 16:56:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-14 16:56:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1703 transitions. [2021-12-14 16:56:48,022 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.566156914893617 [2021-12-14 16:56:48,022 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1703 transitions. [2021-12-14 16:56:48,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1703 transitions. [2021-12-14 16:56:48,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:48,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1703 transitions. [2021-12-14 16:56:48,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 53.21875) internal successors, (1703), 32 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:48,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:48,026 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:48,026 INFO L186 Difference]: Start difference. First operand has 338 places, 288 transitions, 2900 flow. Second operand 32 states and 1703 transitions. [2021-12-14 16:56:48,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 323 transitions, 3727 flow [2021-12-14 16:56:48,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 323 transitions, 3449 flow, removed 30 selfloop flow, removed 26 redundant places. [2021-12-14 16:56:48,057 INFO L242 Difference]: Finished difference. Result has 344 places, 277 transitions, 2813 flow [2021-12-14 16:56:48,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2813, PETRI_PLACES=344, PETRI_TRANSITIONS=277} [2021-12-14 16:56:48,058 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 256 predicate places. [2021-12-14 16:56:48,058 INFO L470 AbstractCegarLoop]: Abstraction has has 344 places, 277 transitions, 2813 flow [2021-12-14 16:56:48,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:48,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:48,058 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] [2021-12-14 16:56:48,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-14 16:56:48,059 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash 400484758, now seen corresponding path program 32 times [2021-12-14 16:56:48,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:48,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812501255] [2021-12-14 16:56:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:48,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:48,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812501255] [2021-12-14 16:56:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812501255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:48,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:48,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:48,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978510586] [2021-12-14 16:56:48,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:48,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:48,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:48,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:48,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:48,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 277 transitions, 2813 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:48,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:48,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:48,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:49,997 INFO L129 PetriNetUnfolder]: 262/761 cut-off events. [2021-12-14 16:56:49,997 INFO L130 PetriNetUnfolder]: For 5125/5125 co-relation queries the response was YES. [2021-12-14 16:56:50,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 761 events. 262/761 cut-off events. For 5125/5125 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3810 event pairs, 18 based on Foata normal form. 1/759 useless extension candidates. Maximal degree in co-relation 4394. Up to 494 conditions per place. [2021-12-14 16:56:50,005 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 163 selfloop transitions, 92 changer transitions 15/309 dead transitions. [2021-12-14 16:56:50,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 309 transitions, 3593 flow [2021-12-14 16:56:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 16:56:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-14 16:56:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1694 transitions. [2021-12-14 16:56:50,007 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5631648936170213 [2021-12-14 16:56:50,008 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1694 transitions. [2021-12-14 16:56:50,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1694 transitions. [2021-12-14 16:56:50,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:50,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1694 transitions. [2021-12-14 16:56:50,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.9375) internal successors, (1694), 32 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:50,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:50,011 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:50,012 INFO L186 Difference]: Start difference. First operand has 344 places, 277 transitions, 2813 flow. Second operand 32 states and 1694 transitions. [2021-12-14 16:56:50,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 309 transitions, 3593 flow [2021-12-14 16:56:50,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 309 transitions, 3256 flow, removed 28 selfloop flow, removed 36 redundant places. [2021-12-14 16:56:50,043 INFO L242 Difference]: Finished difference. Result has 336 places, 276 transitions, 2698 flow [2021-12-14 16:56:50,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2698, PETRI_PLACES=336, PETRI_TRANSITIONS=276} [2021-12-14 16:56:50,043 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 248 predicate places. [2021-12-14 16:56:50,043 INFO L470 AbstractCegarLoop]: Abstraction has has 336 places, 276 transitions, 2698 flow [2021-12-14 16:56:50,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:50,044 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:50,044 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] [2021-12-14 16:56:50,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-14 16:56:50,044 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash 145279624, now seen corresponding path program 33 times [2021-12-14 16:56:50,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960662640] [2021-12-14 16:56:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:50,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:50,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960662640] [2021-12-14 16:56:50,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960662640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:50,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:50,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-14 16:56:50,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439729093] [2021-12-14 16:56:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:50,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 16:56:50,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 16:56:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:56:50,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:50,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 276 transitions, 2698 flow. Second operand has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:50,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:50,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:50,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:51,196 INFO L129 PetriNetUnfolder]: 257/748 cut-off events. [2021-12-14 16:56:51,196 INFO L130 PetriNetUnfolder]: For 4872/4872 co-relation queries the response was YES. [2021-12-14 16:56:51,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 748 events. 257/748 cut-off events. For 4872/4872 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3729 event pairs, 20 based on Foata normal form. 1/745 useless extension candidates. Maximal degree in co-relation 4239. Up to 461 conditions per place. [2021-12-14 16:56:51,204 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 106 changer transitions 20/306 dead transitions. [2021-12-14 16:56:51,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 306 transitions, 3432 flow [2021-12-14 16:56:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:56:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:56:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1600 transitions. [2021-12-14 16:56:51,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2021-12-14 16:56:51,205 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1600 transitions. [2021-12-14 16:56:51,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1600 transitions. [2021-12-14 16:56:51,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:51,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1600 transitions. [2021-12-14 16:56:51,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.333333333333336) internal successors, (1600), 30 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:51,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:51,209 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:51,209 INFO L186 Difference]: Start difference. First operand has 336 places, 276 transitions, 2698 flow. Second operand 30 states and 1600 transitions. [2021-12-14 16:56:51,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 306 transitions, 3432 flow [2021-12-14 16:56:51,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 306 transitions, 3217 flow, removed 15 selfloop flow, removed 31 redundant places. [2021-12-14 16:56:51,239 INFO L242 Difference]: Finished difference. Result has 333 places, 268 transitions, 2667 flow [2021-12-14 16:56:51,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2667, PETRI_PLACES=333, PETRI_TRANSITIONS=268} [2021-12-14 16:56:51,240 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 245 predicate places. [2021-12-14 16:56:51,241 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 268 transitions, 2667 flow [2021-12-14 16:56:51,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.10526315789474) internal successors, (971), 19 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:51,241 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:51,241 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] [2021-12-14 16:56:51,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-14 16:56:51,241 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1614481682, now seen corresponding path program 34 times [2021-12-14 16:56:51,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:51,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123339351] [2021-12-14 16:56:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:51,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:51,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:51,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123339351] [2021-12-14 16:56:51,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123339351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:51,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:51,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:51,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481502023] [2021-12-14 16:56:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:51,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:51,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:51,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:51,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:51,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 268 transitions, 2667 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:51,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:51,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:51,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:52,431 INFO L129 PetriNetUnfolder]: 249/716 cut-off events. [2021-12-14 16:56:52,431 INFO L130 PetriNetUnfolder]: For 4476/4476 co-relation queries the response was YES. [2021-12-14 16:56:52,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4192 conditions, 716 events. 249/716 cut-off events. For 4476/4476 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3471 event pairs, 18 based on Foata normal form. 1/714 useless extension candidates. Maximal degree in co-relation 4086. Up to 456 conditions per place. [2021-12-14 16:56:52,439 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 98 changer transitions 17/295 dead transitions. [2021-12-14 16:56:52,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 295 transitions, 3322 flow [2021-12-14 16:56:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:56:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:56:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1593 transitions. [2021-12-14 16:56:52,440 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5648936170212766 [2021-12-14 16:56:52,440 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1593 transitions. [2021-12-14 16:56:52,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1593 transitions. [2021-12-14 16:56:52,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:52,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1593 transitions. [2021-12-14 16:56:52,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 53.1) internal successors, (1593), 30 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:52,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:52,443 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:52,443 INFO L186 Difference]: Start difference. First operand has 333 places, 268 transitions, 2667 flow. Second operand 30 states and 1593 transitions. [2021-12-14 16:56:52,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 295 transitions, 3322 flow [2021-12-14 16:56:52,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 295 transitions, 3035 flow, removed 11 selfloop flow, removed 32 redundant places. [2021-12-14 16:56:52,484 INFO L242 Difference]: Finished difference. Result has 323 places, 261 transitions, 2546 flow [2021-12-14 16:56:52,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2546, PETRI_PLACES=323, PETRI_TRANSITIONS=261} [2021-12-14 16:56:52,484 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 235 predicate places. [2021-12-14 16:56:52,484 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 261 transitions, 2546 flow [2021-12-14 16:56:52,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:52,485 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:52,485 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] [2021-12-14 16:56:52,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-14 16:56:52,485 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1987275834, now seen corresponding path program 35 times [2021-12-14 16:56:52,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:52,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741069949] [2021-12-14 16:56:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:52,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:52,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:52,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741069949] [2021-12-14 16:56:52,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741069949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:52,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:52,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-14 16:56:52,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620416810] [2021-12-14 16:56:52,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:52,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:56:52,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:56:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:56:52,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:52,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 261 transitions, 2546 flow. Second operand has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:52,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:52,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:52,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:53,787 INFO L129 PetriNetUnfolder]: 247/706 cut-off events. [2021-12-14 16:56:53,788 INFO L130 PetriNetUnfolder]: For 3899/3899 co-relation queries the response was YES. [2021-12-14 16:56:53,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 706 events. 247/706 cut-off events. For 3899/3899 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3379 event pairs, 19 based on Foata normal form. 1/704 useless extension candidates. Maximal degree in co-relation 3951. Up to 460 conditions per place. [2021-12-14 16:56:53,794 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 148 selfloop transitions, 77 changer transitions 23/287 dead transitions. [2021-12-14 16:56:53,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 287 transitions, 3177 flow [2021-12-14 16:56:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:56:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:56:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1588 transitions. [2021-12-14 16:56:53,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5631205673758866 [2021-12-14 16:56:53,796 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1588 transitions. [2021-12-14 16:56:53,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1588 transitions. [2021-12-14 16:56:53,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:53,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1588 transitions. [2021-12-14 16:56:53,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 52.93333333333333) internal successors, (1588), 30 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:53,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:53,800 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 94.0) internal successors, (2914), 31 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:53,801 INFO L186 Difference]: Start difference. First operand has 323 places, 261 transitions, 2546 flow. Second operand 30 states and 1588 transitions. [2021-12-14 16:56:53,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 287 transitions, 3177 flow [2021-12-14 16:56:53,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 287 transitions, 2870 flow, removed 13 selfloop flow, removed 28 redundant places. [2021-12-14 16:56:53,828 INFO L242 Difference]: Finished difference. Result has 314 places, 249 transitions, 2275 flow [2021-12-14 16:56:53,828 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2275, PETRI_PLACES=314, PETRI_TRANSITIONS=249} [2021-12-14 16:56:53,828 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 226 predicate places. [2021-12-14 16:56:53,829 INFO L470 AbstractCegarLoop]: Abstraction has has 314 places, 249 transitions, 2275 flow [2021-12-14 16:56:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 51.0) internal successors, (1020), 20 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:53,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:53,829 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] [2021-12-14 16:56:53,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-14 16:56:53,829 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1554589640, now seen corresponding path program 36 times [2021-12-14 16:56:53,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:53,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702701428] [2021-12-14 16:56:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:53,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:54,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:54,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702701428] [2021-12-14 16:56:54,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702701428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:54,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:54,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 16:56:54,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902974226] [2021-12-14 16:56:54,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:54,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:56:54,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:56:54,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:56:54,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:54,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 249 transitions, 2275 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:54,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:54,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:54,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:55,997 INFO L129 PetriNetUnfolder]: 245/699 cut-off events. [2021-12-14 16:56:55,997 INFO L130 PetriNetUnfolder]: For 3698/3698 co-relation queries the response was YES. [2021-12-14 16:56:56,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3868 conditions, 699 events. 245/699 cut-off events. For 3698/3698 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3317 event pairs, 17 based on Foata normal form. 1/698 useless extension candidates. Maximal degree in co-relation 3770. Up to 454 conditions per place. [2021-12-14 16:56:56,004 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 141 selfloop transitions, 87 changer transitions 16/283 dead transitions. [2021-12-14 16:56:56,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 283 transitions, 3002 flow [2021-12-14 16:56:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 16:56:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-14 16:56:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1841 transitions. [2021-12-14 16:56:56,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2021-12-14 16:56:56,006 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1841 transitions. [2021-12-14 16:56:56,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1841 transitions. [2021-12-14 16:56:56,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:56,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1841 transitions. [2021-12-14 16:56:56,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.6) internal successors, (1841), 35 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:56,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:56,018 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:56,018 INFO L186 Difference]: Start difference. First operand has 314 places, 249 transitions, 2275 flow. Second operand 35 states and 1841 transitions. [2021-12-14 16:56:56,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 283 transitions, 3002 flow [2021-12-14 16:56:56,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 283 transitions, 2717 flow, removed 20 selfloop flow, removed 34 redundant places. [2021-12-14 16:56:56,042 INFO L242 Difference]: Finished difference. Result has 303 places, 251 transitions, 2242 flow [2021-12-14 16:56:56,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2242, PETRI_PLACES=303, PETRI_TRANSITIONS=251} [2021-12-14 16:56:56,043 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 215 predicate places. [2021-12-14 16:56:56,043 INFO L470 AbstractCegarLoop]: Abstraction has has 303 places, 251 transitions, 2242 flow [2021-12-14 16:56:56,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:56,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:56,043 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] [2021-12-14 16:56:56,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-14 16:56:56,044 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash 141646928, now seen corresponding path program 37 times [2021-12-14 16:56:56,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:56,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500945216] [2021-12-14 16:56:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:56,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:56,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:56,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500945216] [2021-12-14 16:56:56,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500945216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:56,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:56,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 16:56:56,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224324697] [2021-12-14 16:56:56,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:56,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:56:56,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:56:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:56:56,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:56,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 251 transitions, 2242 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:56,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:56,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:56,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:57,525 INFO L129 PetriNetUnfolder]: 240/678 cut-off events. [2021-12-14 16:56:57,526 INFO L130 PetriNetUnfolder]: For 3710/3710 co-relation queries the response was YES. [2021-12-14 16:56:57,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 678 events. 240/678 cut-off events. For 3710/3710 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3150 event pairs, 19 based on Foata normal form. 1/676 useless extension candidates. Maximal degree in co-relation 3665. Up to 450 conditions per place. [2021-12-14 16:56:57,531 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 139 selfloop transitions, 73 changer transitions 23/274 dead transitions. [2021-12-14 16:56:57,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 274 transitions, 2835 flow [2021-12-14 16:56:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 16:56:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-14 16:56:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1685 transitions. [2021-12-14 16:56:57,533 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5601728723404256 [2021-12-14 16:56:57,533 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1685 transitions. [2021-12-14 16:56:57,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1685 transitions. [2021-12-14 16:56:57,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:57,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1685 transitions. [2021-12-14 16:56:57,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.65625) internal successors, (1685), 32 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:57,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:57,536 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:57,537 INFO L186 Difference]: Start difference. First operand has 303 places, 251 transitions, 2242 flow. Second operand 32 states and 1685 transitions. [2021-12-14 16:56:57,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 274 transitions, 2835 flow [2021-12-14 16:56:57,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 274 transitions, 2597 flow, removed 31 selfloop flow, removed 30 redundant places. [2021-12-14 16:56:57,557 INFO L242 Difference]: Finished difference. Result has 302 places, 237 transitions, 2050 flow [2021-12-14 16:56:57,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2050, PETRI_PLACES=302, PETRI_TRANSITIONS=237} [2021-12-14 16:56:57,558 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 214 predicate places. [2021-12-14 16:56:57,558 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 237 transitions, 2050 flow [2021-12-14 16:56:57,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:57,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:57,559 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] [2021-12-14 16:56:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-14 16:56:57,559 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1861913176, now seen corresponding path program 38 times [2021-12-14 16:56:57,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905591211] [2021-12-14 16:56:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:57,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:57,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905591211] [2021-12-14 16:56:57,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905591211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:57,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:57,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 16:56:57,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740658956] [2021-12-14 16:56:57,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:57,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:56:57,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:57,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:56:57,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:56:57,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:57,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 237 transitions, 2050 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:57,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:57,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:57,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:59,146 INFO L129 PetriNetUnfolder]: 240/670 cut-off events. [2021-12-14 16:56:59,146 INFO L130 PetriNetUnfolder]: For 3545/3545 co-relation queries the response was YES. [2021-12-14 16:56:59,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 670 events. 240/670 cut-off events. For 3545/3545 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3094 event pairs, 19 based on Foata normal form. 1/669 useless extension candidates. Maximal degree in co-relation 3576. Up to 447 conditions per place. [2021-12-14 16:56:59,152 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 135 selfloop transitions, 80 changer transitions 16/270 dead transitions. [2021-12-14 16:56:59,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 270 transitions, 2751 flow [2021-12-14 16:56:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 16:56:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-12-14 16:56:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1837 transitions. [2021-12-14 16:56:59,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5583586626139818 [2021-12-14 16:56:59,153 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1837 transitions. [2021-12-14 16:56:59,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1837 transitions. [2021-12-14 16:56:59,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:59,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1837 transitions. [2021-12-14 16:56:59,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 52.48571428571429) internal successors, (1837), 35 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:59,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:59,157 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 94.0) internal successors, (3384), 36 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:59,157 INFO L186 Difference]: Start difference. First operand has 302 places, 237 transitions, 2050 flow. Second operand 35 states and 1837 transitions. [2021-12-14 16:56:59,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 270 transitions, 2751 flow [2021-12-14 16:56:59,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 270 transitions, 2463 flow, removed 35 selfloop flow, removed 36 redundant places. [2021-12-14 16:56:59,176 INFO L242 Difference]: Finished difference. Result has 284 places, 239 transitions, 2014 flow [2021-12-14 16:56:59,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2014, PETRI_PLACES=284, PETRI_TRANSITIONS=239} [2021-12-14 16:56:59,176 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 196 predicate places. [2021-12-14 16:56:59,177 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 239 transitions, 2014 flow [2021-12-14 16:56:59,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:59,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:59,177 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] [2021-12-14 16:56:59,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-14 16:56:59,177 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash -653631182, now seen corresponding path program 39 times [2021-12-14 16:56:59,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:59,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298801204] [2021-12-14 16:56:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:59,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:59,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:59,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298801204] [2021-12-14 16:56:59,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298801204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:59,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:59,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 16:56:59,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811714886] [2021-12-14 16:56:59,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:59,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:56:59,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:56:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:56:59,482 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:56:59,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 239 transitions, 2014 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:59,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:59,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:56:59,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:00,498 INFO L129 PetriNetUnfolder]: 235/660 cut-off events. [2021-12-14 16:57:00,498 INFO L130 PetriNetUnfolder]: For 3221/3221 co-relation queries the response was YES. [2021-12-14 16:57:00,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 660 events. 235/660 cut-off events. For 3221/3221 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3050 event pairs, 21 based on Foata normal form. 1/658 useless extension candidates. Maximal degree in co-relation 3420. Up to 443 conditions per place. [2021-12-14 16:57:00,504 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 132 selfloop transitions, 61 changer transitions 29/261 dead transitions. [2021-12-14 16:57:00,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 261 transitions, 2569 flow [2021-12-14 16:57:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 16:57:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-14 16:57:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1681 transitions. [2021-12-14 16:57:00,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558843085106383 [2021-12-14 16:57:00,506 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1681 transitions. [2021-12-14 16:57:00,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1681 transitions. [2021-12-14 16:57:00,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:00,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1681 transitions. [2021-12-14 16:57:00,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 52.53125) internal successors, (1681), 32 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:00,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:00,509 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 94.0) internal successors, (3102), 33 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:00,509 INFO L186 Difference]: Start difference. First operand has 284 places, 239 transitions, 2014 flow. Second operand 32 states and 1681 transitions. [2021-12-14 16:57:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 261 transitions, 2569 flow [2021-12-14 16:57:00,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 261 transitions, 2360 flow, removed 26 selfloop flow, removed 29 redundant places. [2021-12-14 16:57:00,528 INFO L242 Difference]: Finished difference. Result has 284 places, 220 transitions, 1792 flow [2021-12-14 16:57:00,529 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1792, PETRI_PLACES=284, PETRI_TRANSITIONS=220} [2021-12-14 16:57:00,529 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 196 predicate places. [2021-12-14 16:57:00,529 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 220 transitions, 1792 flow [2021-12-14 16:57:00,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:00,529 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:00,530 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] [2021-12-14 16:57:00,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-14 16:57:00,530 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:57:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1113334856, now seen corresponding path program 40 times [2021-12-14 16:57:00,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:00,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212140239] [2021-12-14 16:57:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:00,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:00,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:00,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212140239] [2021-12-14 16:57:00,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212140239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:00,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:00,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-14 16:57:00,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867426109] [2021-12-14 16:57:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:00,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:57:00,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:57:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:57:00,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2021-12-14 16:57:00,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 220 transitions, 1792 flow. Second operand has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:00,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:00,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2021-12-14 16:57:00,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:01,968 INFO L129 PetriNetUnfolder]: 238/662 cut-off events. [2021-12-14 16:57:01,968 INFO L130 PetriNetUnfolder]: For 3357/3357 co-relation queries the response was YES. [2021-12-14 16:57:01,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 662 events. 238/662 cut-off events. For 3357/3357 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3057 event pairs, 17 based on Foata normal form. 1/661 useless extension candidates. Maximal degree in co-relation 3391. Up to 433 conditions per place. [2021-12-14 16:57:01,974 INFO L132 encePairwiseOnDemand]: 64/94 looper letters, 120 selfloop transitions, 75 changer transitions 22/256 dead transitions. [2021-12-14 16:57:01,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 256 transitions, 2483 flow [2021-12-14 16:57:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 16:57:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-14 16:57:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1739 transitions. [2021-12-14 16:57:01,976 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2021-12-14 16:57:01,976 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1739 transitions. [2021-12-14 16:57:01,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1739 transitions. [2021-12-14 16:57:01,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:01,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1739 transitions. [2021-12-14 16:57:01,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 52.696969696969695) internal successors, (1739), 33 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:01,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:01,979 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 94.0) internal successors, (3196), 34 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:01,979 INFO L186 Difference]: Start difference. First operand has 284 places, 220 transitions, 1792 flow. Second operand 33 states and 1739 transitions. [2021-12-14 16:57:01,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 256 transitions, 2483 flow [2021-12-14 16:57:01,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 256 transitions, 2239 flow, removed 33 selfloop flow, removed 34 redundant places. [2021-12-14 16:57:01,997 INFO L242 Difference]: Finished difference. Result has 262 places, 220 transitions, 1766 flow [2021-12-14 16:57:01,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1766, PETRI_PLACES=262, PETRI_TRANSITIONS=220} [2021-12-14 16:57:01,998 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 174 predicate places. [2021-12-14 16:57:01,998 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 220 transitions, 1766 flow [2021-12-14 16:57:01,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 50.904761904761905) internal successors, (1069), 21 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:57:01,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:01,999 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] [2021-12-14 16:57:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-14 16:57:01,999 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:57:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:01,999 INFO L85 PathProgramCache]: Analyzing trace with hash -457638894, now seen corresponding path program 41 times [2021-12-14 16:57:02,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:02,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98211297] [2021-12-14 16:57:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:02,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat