./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-exp-term-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/chl-exp-term-symm.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 79419a4ba87d66b20bd1eac3a57771b6df78d8c052d6832c2c2f61b321d58321 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:15:46,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:15:46,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:15:47,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:15:47,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:15:47,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:15:47,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:15:47,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:15:47,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:15:47,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:15:47,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:15:47,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:15:47,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:15:47,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:15:47,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:15:47,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:15:47,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:15:47,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:15:47,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:15:47,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:15:47,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:15:47,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:15:47,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:15:47,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:15:47,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:15:47,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:15:47,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:15:47,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:15:47,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:15:47,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:15:47,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:15:47,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:15:47,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:15:47,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:15:47,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:15:47,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:15:47,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:15:47,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:15:47,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:15:47,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:15:47,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:15:47,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:15:47,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:15:47,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:15:47,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:15:47,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:15:47,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:15:47,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:15:47,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:15:47,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:15:47,126 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:15:47,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:15:47,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:15:47,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:15:47,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:15:47,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:15:47,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:15:47,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:15:47,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:15:47,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:15:47,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:15:47,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:15:47,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:15:47,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:15:47,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:15:47,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:15:47,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:15:47,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:15:47,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:15:47,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:15:47,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:15:47,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:15:47,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:15:47,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:15:47,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:15:47,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:15:47,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79419a4ba87d66b20bd1eac3a57771b6df78d8c052d6832c2c2f61b321d58321 [2021-12-21 15:15:47,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:15:47,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:15:47,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:15:47,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:15:47,349 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:15:47,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-exp-term-symm.wvr.c [2021-12-21 15:15:47,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82464c153/b306b439e35544f289a45df51a56d271/FLAG75f04444a [2021-12-21 15:15:47,778 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:15:47,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-exp-term-symm.wvr.c [2021-12-21 15:15:47,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82464c153/b306b439e35544f289a45df51a56d271/FLAG75f04444a [2021-12-21 15:15:48,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82464c153/b306b439e35544f289a45df51a56d271 [2021-12-21 15:15:48,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:15:48,195 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:15:48,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:15:48,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:15:48,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:15:48,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6256c0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48, skipping insertion in model container [2021-12-21 15:15:48,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:15:48,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:15:48,348 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/chl-exp-term-symm.wvr.c[2628,2641] [2021-12-21 15:15:48,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:15:48,370 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:15:48,405 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/chl-exp-term-symm.wvr.c[2628,2641] [2021-12-21 15:15:48,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:15:48,418 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:15:48,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48 WrapperNode [2021-12-21 15:15:48,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:15:48,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:15:48,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:15:48,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:15:48,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,463 INFO L137 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2021-12-21 15:15:48,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:15:48,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:15:48,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:15:48,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:15:48,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:15:48,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:15:48,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:15:48,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:15:48,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (1/1) ... [2021-12-21 15:15:48,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:15:48,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:15:48,539 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) [2021-12-21 15:15:48,541 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 [2021-12-21 15:15:48,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:15:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:15:48,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:15:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:15:48,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:15:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:15:48,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:15:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:15:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:15:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:15:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:15:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:15:48,571 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:15:48,628 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:15:48,630 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:15:48,793 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:15:48,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:15:48,806 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 15:15:48,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:15:48 BoogieIcfgContainer [2021-12-21 15:15:48,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:15:48,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:15:48,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:15:48,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:15:48,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:15:48" (1/3) ... [2021-12-21 15:15:48,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7566b93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:15:48, skipping insertion in model container [2021-12-21 15:15:48,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:15:48" (2/3) ... [2021-12-21 15:15:48,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7566b93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:15:48, skipping insertion in model container [2021-12-21 15:15:48,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:15:48" (3/3) ... [2021-12-21 15:15:48,834 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-exp-term-symm.wvr.c [2021-12-21 15:15:48,838 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:15:48,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:15:48,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:15:48,851 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:15:48,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,931 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,932 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,933 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,933 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,933 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,933 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,934 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,934 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,935 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,935 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,935 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,936 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,938 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,938 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,938 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,939 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,940 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,941 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,945 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,946 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,946 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,947 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,948 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,952 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,954 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,959 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,962 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,962 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,962 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,962 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,962 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,962 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,962 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,963 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,963 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,963 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,963 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,963 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,965 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,965 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,969 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,970 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,970 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,970 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,970 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,970 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,971 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,971 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,971 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,971 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,972 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,972 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,972 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,972 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,972 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,972 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,973 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,974 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,975 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,976 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,977 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,977 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,977 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,977 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,977 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,977 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,983 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,984 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,985 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,985 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,987 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,990 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,990 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,990 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,990 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,990 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,991 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,993 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,994 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,995 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,997 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:15:48,999 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:15:49,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:15:49,059 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 [2021-12-21 15:15:49,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:15:49,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 168 places, 174 transitions, 364 flow [2021-12-21 15:15:49,156 INFO L129 PetriNetUnfolder]: 13/172 cut-off events. [2021-12-21 15:15:49,160 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:15:49,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 13/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 283 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2021-12-21 15:15:49,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 174 transitions, 364 flow [2021-12-21 15:15:49,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 163 transitions, 338 flow [2021-12-21 15:15:49,210 INFO L129 PetriNetUnfolder]: 13/162 cut-off events. [2021-12-21 15:15:49,210 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:15:49,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:49,211 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:49,211 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash -679452967, now seen corresponding path program 1 times [2021-12-21 15:15:49,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:49,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63520421] [2021-12-21 15:15:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:49,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:49,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63520421] [2021-12-21 15:15:49,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63520421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:49,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:49,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:15:49,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059486539] [2021-12-21 15:15:49,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:49,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:15:49,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:15:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:15:49,570 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 174 [2021-12-21 15:15:49,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 163 transitions, 338 flow. Second operand has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:49,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:49,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 174 [2021-12-21 15:15:49,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:49,820 INFO L129 PetriNetUnfolder]: 58/423 cut-off events. [2021-12-21 15:15:49,820 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2021-12-21 15:15:49,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 423 events. 58/423 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1990 event pairs, 12 based on Foata normal form. 24/420 useless extension candidates. Maximal degree in co-relation 377. Up to 44 conditions per place. [2021-12-21 15:15:49,825 INFO L132 encePairwiseOnDemand]: 154/174 looper letters, 52 selfloop transitions, 10 changer transitions 34/223 dead transitions. [2021-12-21 15:15:49,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 223 transitions, 677 flow [2021-12-21 15:15:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 15:15:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-21 15:15:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2175 transitions. [2021-12-21 15:15:49,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-12-21 15:15:49,840 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2175 transitions. [2021-12-21 15:15:49,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2175 transitions. [2021-12-21 15:15:49,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:49,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2175 transitions. [2021-12-21 15:15:49,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 145.0) internal successors, (2175), 15 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:49,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 174.0) internal successors, (2784), 16 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:49,859 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 174.0) internal successors, (2784), 16 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:49,861 INFO L186 Difference]: Start difference. First operand has 157 places, 163 transitions, 338 flow. Second operand 15 states and 2175 transitions. [2021-12-21 15:15:49,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 223 transitions, 677 flow [2021-12-21 15:15:49,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 223 transitions, 651 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:15:49,867 INFO L242 Difference]: Finished difference. Result has 177 places, 161 transitions, 389 flow [2021-12-21 15:15:49,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=389, PETRI_PLACES=177, PETRI_TRANSITIONS=161} [2021-12-21 15:15:49,871 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 20 predicate places. [2021-12-21 15:15:49,871 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 161 transitions, 389 flow [2021-12-21 15:15:49,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:49,872 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:49,873 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:49,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:15:49,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1258678119, now seen corresponding path program 1 times [2021-12-21 15:15:49,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218950170] [2021-12-21 15:15:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:49,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:49,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218950170] [2021-12-21 15:15:49,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218950170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:49,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:49,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:15:49,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054035644] [2021-12-21 15:15:49,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:49,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:15:49,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:15:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:15:49,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2021-12-21 15:15:49,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 161 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:49,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:49,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2021-12-21 15:15:49,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:50,075 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([405] L44-17-->L44-18: Formula: (= v_~result_4~0_1 |v_thread1Thread1of1ForFork0_#t~ite4#1_3|) InVars {thread1Thread1of1ForFork0_#t~ite4#1=|v_thread1Thread1of1ForFork0_#t~ite4#1_3|} OutVars{~result_4~0=v_~result_4~0_1, thread1Thread1of1ForFork0_#t~ite4#1=|v_thread1Thread1of1ForFork0_#t~ite4#1_3|} AuxVars[] AssignedVars[~result_4~0][55], [Black: 183#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 189#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 185#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 195#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 109#L65-4true, Black: 175#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0)), Black: 180#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 187#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 176#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 174#(= ~result_5~0 0), Black: 197#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 171#true, 27#L50-19true, 45#L44-18true, 212#(= (+ (* (- 256) (div ~sort_label_is_null_3~0 256)) ~sort_label_is_null_3~0) 0)]) [2021-12-21 15:15:50,076 INFO L384 tUnfolder$Statistics]: this new event has 77 ancestors and is cut-off event [2021-12-21 15:15:50,076 INFO L387 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2021-12-21 15:15:50,076 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is cut-off event [2021-12-21 15:15:50,076 INFO L387 tUnfolder$Statistics]: existing Event has 53 ancestors and is cut-off event [2021-12-21 15:15:50,077 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([454] L50-18-->L50-19: Formula: true InVars {} OutVars{thread2Thread1of1ForFork1_#t~ite8#1=|v_thread2Thread1of1ForFork1_#t~ite8#1_5|} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_#t~ite8#1][114], [Black: 183#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 189#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 185#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 195#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 109#L65-4true, Black: 175#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0)), Black: 180#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 187#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 176#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 174#(= ~result_5~0 0), Black: 197#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 171#true, 27#L50-19true, 45#L44-18true, 212#(= (+ (* (- 256) (div ~sort_label_is_null_3~0 256)) ~sort_label_is_null_3~0) 0)]) [2021-12-21 15:15:50,078 INFO L384 tUnfolder$Statistics]: this new event has 77 ancestors and is cut-off event [2021-12-21 15:15:50,078 INFO L387 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2021-12-21 15:15:50,078 INFO L387 tUnfolder$Statistics]: existing Event has 53 ancestors and is cut-off event [2021-12-21 15:15:50,078 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is cut-off event [2021-12-21 15:15:50,078 INFO L382 tUnfolder$Statistics]: inserting event number 5 for the transition-marking pair ([405] L44-17-->L44-18: Formula: (= v_~result_4~0_1 |v_thread1Thread1of1ForFork0_#t~ite4#1_3|) InVars {thread1Thread1of1ForFork0_#t~ite4#1=|v_thread1Thread1of1ForFork0_#t~ite4#1_3|} OutVars{~result_4~0=v_~result_4~0_1, thread1Thread1of1ForFork0_#t~ite4#1=|v_thread1Thread1of1ForFork0_#t~ite4#1_3|} AuxVars[] AssignedVars[~result_4~0][55], [Black: 183#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 189#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 185#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 195#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 109#L65-4true, Black: 175#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0)), Black: 180#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 187#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 176#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 174#(= ~result_5~0 0), Black: 197#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 171#true, 27#L50-19true, 45#L44-18true, 212#(= (+ (* (- 256) (div ~sort_label_is_null_3~0 256)) ~sort_label_is_null_3~0) 0)]) [2021-12-21 15:15:50,078 INFO L384 tUnfolder$Statistics]: this new event has 75 ancestors and is cut-off event [2021-12-21 15:15:50,078 INFO L387 tUnfolder$Statistics]: existing Event has 77 ancestors and is cut-off event [2021-12-21 15:15:50,079 INFO L387 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2021-12-21 15:15:50,079 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is cut-off event [2021-12-21 15:15:50,079 INFO L387 tUnfolder$Statistics]: existing Event has 53 ancestors and is cut-off event [2021-12-21 15:15:50,080 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([454] L50-18-->L50-19: Formula: true InVars {} OutVars{thread2Thread1of1ForFork1_#t~ite8#1=|v_thread2Thread1of1ForFork1_#t~ite8#1_5|} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_#t~ite8#1][114], [Black: 183#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 189#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 185#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 195#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 109#L65-4true, Black: 175#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0)), 149#L44-19true, Black: 180#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 187#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 176#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 174#(= ~result_5~0 0), Black: 197#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 171#true, 27#L50-19true, 212#(= (+ (* (- 256) (div ~sort_label_is_null_3~0 256)) ~sort_label_is_null_3~0) 0)]) [2021-12-21 15:15:50,080 INFO L384 tUnfolder$Statistics]: this new event has 78 ancestors and is cut-off event [2021-12-21 15:15:50,080 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-21 15:15:50,080 INFO L387 tUnfolder$Statistics]: existing Event has 56 ancestors and is cut-off event [2021-12-21 15:15:50,080 INFO L387 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2021-12-21 15:15:50,081 INFO L382 tUnfolder$Statistics]: inserting event number 5 for the transition-marking pair ([454] L50-18-->L50-19: Formula: true InVars {} OutVars{thread2Thread1of1ForFork1_#t~ite8#1=|v_thread2Thread1of1ForFork1_#t~ite8#1_5|} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_#t~ite8#1][114], [Black: 183#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 189#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 185#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 195#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 109#L65-4true, Black: 175#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0)), Black: 180#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 187#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 176#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 174#(= ~result_5~0 0), Black: 197#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 171#true, 27#L50-19true, 45#L44-18true, 212#(= (+ (* (- 256) (div ~sort_label_is_null_3~0 256)) ~sort_label_is_null_3~0) 0)]) [2021-12-21 15:15:50,081 INFO L384 tUnfolder$Statistics]: this new event has 75 ancestors and is cut-off event [2021-12-21 15:15:50,081 INFO L387 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2021-12-21 15:15:50,081 INFO L387 tUnfolder$Statistics]: existing Event has 53 ancestors and is cut-off event [2021-12-21 15:15:50,081 INFO L387 tUnfolder$Statistics]: existing Event has 55 ancestors and is cut-off event [2021-12-21 15:15:50,081 INFO L387 tUnfolder$Statistics]: existing Event has 77 ancestors and is cut-off event [2021-12-21 15:15:50,082 INFO L382 tUnfolder$Statistics]: inserting event number 5 for the transition-marking pair ([454] L50-18-->L50-19: Formula: true InVars {} OutVars{thread2Thread1of1ForFork1_#t~ite8#1=|v_thread2Thread1of1ForFork1_#t~ite8#1_5|} AuxVars[] AssignedVars[thread2Thread1of1ForFork1_#t~ite8#1][114], [Black: 183#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 189#(and (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 185#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0)), Black: 195#(and (= ~result_5~0 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 109#L65-4true, 149#L44-19true, Black: 175#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0)), Black: 180#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 187#(and (= |thread1Thread1of1ForFork0_#t~ite4#1| 0) (= |thread2Thread1of1ForFork1_#t~ite8#1| 0) (= ~result_5~0 0) (= ~result_4~0 0)), Black: 176#(and (= ~result_5~0 0) (= ~result_4~0 0)), Black: 174#(= ~result_5~0 0), Black: 197#(and (= ~result_5~0 0) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= ~result_4~0 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), 171#true, 27#L50-19true, 212#(= (+ (* (- 256) (div ~sort_label_is_null_3~0 256)) ~sort_label_is_null_3~0) 0)]) [2021-12-21 15:15:50,082 INFO L384 tUnfolder$Statistics]: this new event has 76 ancestors and is cut-off event [2021-12-21 15:15:50,082 INFO L387 tUnfolder$Statistics]: existing Event has 54 ancestors and is cut-off event [2021-12-21 15:15:50,083 INFO L387 tUnfolder$Statistics]: existing Event has 56 ancestors and is cut-off event [2021-12-21 15:15:50,083 INFO L387 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2021-12-21 15:15:50,083 INFO L387 tUnfolder$Statistics]: existing Event has 78 ancestors and is cut-off event [2021-12-21 15:15:50,104 INFO L129 PetriNetUnfolder]: 107/1061 cut-off events. [2021-12-21 15:15:50,105 INFO L130 PetriNetUnfolder]: For 300/315 co-relation queries the response was YES. [2021-12-21 15:15:50,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1566 conditions, 1061 events. 107/1061 cut-off events. For 300/315 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 8010 event pairs, 17 based on Foata normal form. 6/964 useless extension candidates. Maximal degree in co-relation 1533. Up to 89 conditions per place. [2021-12-21 15:15:50,113 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 31 selfloop transitions, 12 changer transitions 1/185 dead transitions. [2021-12-21 15:15:50,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 185 transitions, 531 flow [2021-12-21 15:15:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:15:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:15:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2021-12-21 15:15:50,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9051724137931034 [2021-12-21 15:15:50,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2021-12-21 15:15:50,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2021-12-21 15:15:50,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:50,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2021-12-21 15:15:50,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,121 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,121 INFO L186 Difference]: Start difference. First operand has 177 places, 161 transitions, 389 flow. Second operand 4 states and 630 transitions. [2021-12-21 15:15:50,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 185 transitions, 531 flow [2021-12-21 15:15:50,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 185 transitions, 520 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-12-21 15:15:50,131 INFO L242 Difference]: Finished difference. Result has 168 places, 171 transitions, 466 flow [2021-12-21 15:15:50,131 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=466, PETRI_PLACES=168, PETRI_TRANSITIONS=171} [2021-12-21 15:15:50,132 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 11 predicate places. [2021-12-21 15:15:50,132 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 171 transitions, 466 flow [2021-12-21 15:15:50,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:50,133 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:50,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:15:50,133 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 405844717, now seen corresponding path program 2 times [2021-12-21 15:15:50,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:50,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409375654] [2021-12-21 15:15:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:50,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:50,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:50,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409375654] [2021-12-21 15:15:50,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409375654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:50,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:50,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:15:50,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699404641] [2021-12-21 15:15:50,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:50,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:15:50,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:15:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:15:50,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2021-12-21 15:15:50,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 171 transitions, 466 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:50,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2021-12-21 15:15:50,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:50,410 INFO L129 PetriNetUnfolder]: 91/972 cut-off events. [2021-12-21 15:15:50,410 INFO L130 PetriNetUnfolder]: For 263/282 co-relation queries the response was YES. [2021-12-21 15:15:50,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 972 events. 91/972 cut-off events. For 263/282 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7097 event pairs, 25 based on Foata normal form. 12/929 useless extension candidates. Maximal degree in co-relation 1251. Up to 106 conditions per place. [2021-12-21 15:15:50,415 INFO L132 encePairwiseOnDemand]: 163/174 looper letters, 37 selfloop transitions, 8 changer transitions 3/189 dead transitions. [2021-12-21 15:15:50,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 189 transitions, 634 flow [2021-12-21 15:15:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:15:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:15:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2021-12-21 15:15:50,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2021-12-21 15:15:50,417 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2021-12-21 15:15:50,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2021-12-21 15:15:50,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:50,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2021-12-21 15:15:50,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,420 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,421 INFO L186 Difference]: Start difference. First operand has 168 places, 171 transitions, 466 flow. Second operand 4 states and 624 transitions. [2021-12-21 15:15:50,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 189 transitions, 634 flow [2021-12-21 15:15:50,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 189 transitions, 634 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:15:50,425 INFO L242 Difference]: Finished difference. Result has 174 places, 176 transitions, 540 flow [2021-12-21 15:15:50,425 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=540, PETRI_PLACES=174, PETRI_TRANSITIONS=176} [2021-12-21 15:15:50,426 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 17 predicate places. [2021-12-21 15:15:50,426 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 176 transitions, 540 flow [2021-12-21 15:15:50,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:50,427 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:50,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:15:50,427 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1435280407, now seen corresponding path program 1 times [2021-12-21 15:15:50,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596929014] [2021-12-21 15:15:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:50,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596929014] [2021-12-21 15:15:50,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596929014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:50,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:50,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:15:50,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306460353] [2021-12-21 15:15:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:50,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:15:50,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:15:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:15:50,514 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2021-12-21 15:15:50,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 176 transitions, 540 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:50,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2021-12-21 15:15:50,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:50,638 INFO L129 PetriNetUnfolder]: 92/1151 cut-off events. [2021-12-21 15:15:50,638 INFO L130 PetriNetUnfolder]: For 422/443 co-relation queries the response was YES. [2021-12-21 15:15:50,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 1151 events. 92/1151 cut-off events. For 422/443 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 8351 event pairs, 20 based on Foata normal form. 9/1104 useless extension candidates. Maximal degree in co-relation 1503. Up to 71 conditions per place. [2021-12-21 15:15:50,643 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 41 selfloop transitions, 11 changer transitions 3/196 dead transitions. [2021-12-21 15:15:50,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 196 transitions, 738 flow [2021-12-21 15:15:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:15:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:15:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 626 transitions. [2021-12-21 15:15:50,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8994252873563219 [2021-12-21 15:15:50,645 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 626 transitions. [2021-12-21 15:15:50,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 626 transitions. [2021-12-21 15:15:50,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:50,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 626 transitions. [2021-12-21 15:15:50,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,648 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,648 INFO L186 Difference]: Start difference. First operand has 174 places, 176 transitions, 540 flow. Second operand 4 states and 626 transitions. [2021-12-21 15:15:50,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 196 transitions, 738 flow [2021-12-21 15:15:50,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 196 transitions, 738 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:15:50,652 INFO L242 Difference]: Finished difference. Result has 179 places, 179 transitions, 602 flow [2021-12-21 15:15:50,652 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=602, PETRI_PLACES=179, PETRI_TRANSITIONS=179} [2021-12-21 15:15:50,653 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 22 predicate places. [2021-12-21 15:15:50,653 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 179 transitions, 602 flow [2021-12-21 15:15:50,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:50,654 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:50,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:15:50,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:50,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1986427037, now seen corresponding path program 2 times [2021-12-21 15:15:50,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:50,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084461244] [2021-12-21 15:15:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:50,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:50,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084461244] [2021-12-21 15:15:50,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084461244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:50,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:50,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:15:50,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632785396] [2021-12-21 15:15:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:50,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:15:50,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:15:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:15:50,688 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2021-12-21 15:15:50,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 179 transitions, 602 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:50,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2021-12-21 15:15:50,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:50,813 INFO L129 PetriNetUnfolder]: 87/1121 cut-off events. [2021-12-21 15:15:50,814 INFO L130 PetriNetUnfolder]: For 611/629 co-relation queries the response was YES. [2021-12-21 15:15:50,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1844 conditions, 1121 events. 87/1121 cut-off events. For 611/629 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7928 event pairs, 26 based on Foata normal form. 13/1084 useless extension candidates. Maximal degree in co-relation 1551. Up to 91 conditions per place. [2021-12-21 15:15:50,818 INFO L132 encePairwiseOnDemand]: 163/174 looper letters, 42 selfloop transitions, 13 changer transitions 3/199 dead transitions. [2021-12-21 15:15:50,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 199 transitions, 826 flow [2021-12-21 15:15:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:15:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:15:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2021-12-21 15:15:50,820 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2021-12-21 15:15:50,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2021-12-21 15:15:50,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2021-12-21 15:15:50,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:50,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2021-12-21 15:15:50,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,823 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,823 INFO L186 Difference]: Start difference. First operand has 179 places, 179 transitions, 602 flow. Second operand 4 states and 624 transitions. [2021-12-21 15:15:50,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 199 transitions, 826 flow [2021-12-21 15:15:50,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 199 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:15:50,828 INFO L242 Difference]: Finished difference. Result has 183 places, 185 transitions, 698 flow [2021-12-21 15:15:50,828 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=698, PETRI_PLACES=183, PETRI_TRANSITIONS=185} [2021-12-21 15:15:50,829 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 26 predicate places. [2021-12-21 15:15:50,829 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 185 transitions, 698 flow [2021-12-21 15:15:50,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:50,829 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:50,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:15:50,830 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:50,830 INFO L85 PathProgramCache]: Analyzing trace with hash 172723029, now seen corresponding path program 3 times [2021-12-21 15:15:50,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:50,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870138384] [2021-12-21 15:15:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:50,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:50,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:50,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870138384] [2021-12-21 15:15:50,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870138384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:50,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:50,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:15:50,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017904390] [2021-12-21 15:15:50,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:50,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:15:50,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:50,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:15:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:15:50,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2021-12-21 15:15:50,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 185 transitions, 698 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:50,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:50,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2021-12-21 15:15:50,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:50,993 INFO L129 PetriNetUnfolder]: 77/1089 cut-off events. [2021-12-21 15:15:50,993 INFO L130 PetriNetUnfolder]: For 686/698 co-relation queries the response was YES. [2021-12-21 15:15:50,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 1089 events. 77/1089 cut-off events. For 686/698 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 7531 event pairs, 22 based on Foata normal form. 9/1046 useless extension candidates. Maximal degree in co-relation 1530. Up to 91 conditions per place. [2021-12-21 15:15:50,998 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 40 selfloop transitions, 16 changer transitions 3/200 dead transitions. [2021-12-21 15:15:50,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 200 transitions, 888 flow [2021-12-21 15:15:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:15:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:15:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2021-12-21 15:15:51,000 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.896551724137931 [2021-12-21 15:15:51,000 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2021-12-21 15:15:51,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2021-12-21 15:15:51,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:51,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2021-12-21 15:15:51,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,002 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,003 INFO L186 Difference]: Start difference. First operand has 183 places, 185 transitions, 698 flow. Second operand 4 states and 624 transitions. [2021-12-21 15:15:51,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 200 transitions, 888 flow [2021-12-21 15:15:51,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 200 transitions, 864 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-21 15:15:51,008 INFO L242 Difference]: Finished difference. Result has 185 places, 188 transitions, 759 flow [2021-12-21 15:15:51,008 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=759, PETRI_PLACES=185, PETRI_TRANSITIONS=188} [2021-12-21 15:15:51,009 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 28 predicate places. [2021-12-21 15:15:51,009 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 188 transitions, 759 flow [2021-12-21 15:15:51,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:51,009 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:51,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:15:51,010 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash -958876555, now seen corresponding path program 3 times [2021-12-21 15:15:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:51,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683196517] [2021-12-21 15:15:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:51,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:51,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683196517] [2021-12-21 15:15:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683196517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:51,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:51,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:15:51,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139299901] [2021-12-21 15:15:51,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:51,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:15:51,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:15:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:15:51,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2021-12-21 15:15:51,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 188 transitions, 759 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:51,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2021-12-21 15:15:51,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:51,241 INFO L129 PetriNetUnfolder]: 70/1026 cut-off events. [2021-12-21 15:15:51,242 INFO L130 PetriNetUnfolder]: For 709/718 co-relation queries the response was YES. [2021-12-21 15:15:51,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1026 events. 70/1026 cut-off events. For 709/718 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 6946 event pairs, 24 based on Foata normal form. 5/984 useless extension candidates. Maximal degree in co-relation 1504. Up to 53 conditions per place. [2021-12-21 15:15:51,248 INFO L132 encePairwiseOnDemand]: 161/174 looper letters, 45 selfloop transitions, 21 changer transitions 5/210 dead transitions. [2021-12-21 15:15:51,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 210 transitions, 998 flow [2021-12-21 15:15:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:15:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:15:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 782 transitions. [2021-12-21 15:15:51,250 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8988505747126436 [2021-12-21 15:15:51,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 782 transitions. [2021-12-21 15:15:51,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 782 transitions. [2021-12-21 15:15:51,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:51,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 782 transitions. [2021-12-21 15:15:51,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,254 INFO L186 Difference]: Start difference. First operand has 185 places, 188 transitions, 759 flow. Second operand 5 states and 782 transitions. [2021-12-21 15:15:51,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 210 transitions, 998 flow [2021-12-21 15:15:51,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 210 transitions, 981 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-21 15:15:51,269 INFO L242 Difference]: Finished difference. Result has 191 places, 192 transitions, 870 flow [2021-12-21 15:15:51,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=870, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2021-12-21 15:15:51,270 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 34 predicate places. [2021-12-21 15:15:51,270 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 870 flow [2021-12-21 15:15:51,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:51,270 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:51,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:15:51,271 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1796086946, now seen corresponding path program 1 times [2021-12-21 15:15:51,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263803678] [2021-12-21 15:15:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:51,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:51,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:51,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263803678] [2021-12-21 15:15:51,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263803678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:51,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:51,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:51,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129313725] [2021-12-21 15:15:51,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:51,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:51,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:51,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:51,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 870 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:51,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:51,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:51,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:52,016 INFO L129 PetriNetUnfolder]: 307/1623 cut-off events. [2021-12-21 15:15:52,016 INFO L130 PetriNetUnfolder]: For 1109/1179 co-relation queries the response was YES. [2021-12-21 15:15:52,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 1623 events. 307/1623 cut-off events. For 1109/1179 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12415 event pairs, 211 based on Foata normal form. 1/1567 useless extension candidates. Maximal degree in co-relation 2952. Up to 676 conditions per place. [2021-12-21 15:15:52,025 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 90 selfloop transitions, 7 changer transitions 52/298 dead transitions. [2021-12-21 15:15:52,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 298 transitions, 1513 flow [2021-12-21 15:15:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 15:15:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-21 15:15:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4110 transitions. [2021-12-21 15:15:52,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7619577308120133 [2021-12-21 15:15:52,033 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4110 transitions. [2021-12-21 15:15:52,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4110 transitions. [2021-12-21 15:15:52,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:52,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4110 transitions. [2021-12-21 15:15:52,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 132.58064516129033) internal successors, (4110), 31 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,051 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,051 INFO L186 Difference]: Start difference. First operand has 191 places, 192 transitions, 870 flow. Second operand 31 states and 4110 transitions. [2021-12-21 15:15:52,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 298 transitions, 1513 flow [2021-12-21 15:15:52,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 298 transitions, 1499 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-12-21 15:15:52,063 INFO L242 Difference]: Finished difference. Result has 247 places, 198 transitions, 991 flow [2021-12-21 15:15:52,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=991, PETRI_PLACES=247, PETRI_TRANSITIONS=198} [2021-12-21 15:15:52,065 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 90 predicate places. [2021-12-21 15:15:52,065 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 198 transitions, 991 flow [2021-12-21 15:15:52,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:52,066 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:52,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:15:52,067 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1337300728, now seen corresponding path program 2 times [2021-12-21 15:15:52,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654285605] [2021-12-21 15:15:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:52,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:52,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:52,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654285605] [2021-12-21 15:15:52,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654285605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:52,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:52,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:52,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422428187] [2021-12-21 15:15:52,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:52,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:52,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:52,170 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:52,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 198 transitions, 991 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:52,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:52,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:52,666 INFO L129 PetriNetUnfolder]: 321/1674 cut-off events. [2021-12-21 15:15:52,667 INFO L130 PetriNetUnfolder]: For 6457/6527 co-relation queries the response was YES. [2021-12-21 15:15:52,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5545 conditions, 1674 events. 321/1674 cut-off events. For 6457/6527 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12862 event pairs, 220 based on Foata normal form. 1/1616 useless extension candidates. Maximal degree in co-relation 5389. Up to 718 conditions per place. [2021-12-21 15:15:52,680 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 74 selfloop transitions, 12 changer transitions 39/274 dead transitions. [2021-12-21 15:15:52,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 274 transitions, 1864 flow [2021-12-21 15:15:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 15:15:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-21 15:15:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3446 transitions. [2021-12-21 15:15:52,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7617152961980548 [2021-12-21 15:15:52,686 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3446 transitions. [2021-12-21 15:15:52,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3446 transitions. [2021-12-21 15:15:52,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:52,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3446 transitions. [2021-12-21 15:15:52,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 132.53846153846155) internal successors, (3446), 26 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,700 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,700 INFO L186 Difference]: Start difference. First operand has 247 places, 198 transitions, 991 flow. Second operand 26 states and 3446 transitions. [2021-12-21 15:15:52,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 274 transitions, 1864 flow [2021-12-21 15:15:52,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 274 transitions, 1743 flow, removed 60 selfloop flow, removed 12 redundant places. [2021-12-21 15:15:52,725 INFO L242 Difference]: Finished difference. Result has 261 places, 208 transitions, 1147 flow [2021-12-21 15:15:52,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1147, PETRI_PLACES=261, PETRI_TRANSITIONS=208} [2021-12-21 15:15:52,726 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 104 predicate places. [2021-12-21 15:15:52,726 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 208 transitions, 1147 flow [2021-12-21 15:15:52,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,727 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:52,727 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:52,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 15:15:52,727 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash 672767696, now seen corresponding path program 3 times [2021-12-21 15:15:52,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604859120] [2021-12-21 15:15:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:52,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:52,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604859120] [2021-12-21 15:15:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604859120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:52,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:52,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064417503] [2021-12-21 15:15:52,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:52,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:52,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:52,825 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:52,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 208 transitions, 1147 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:52,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:52,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:52,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:53,347 INFO L129 PetriNetUnfolder]: 322/1704 cut-off events. [2021-12-21 15:15:53,348 INFO L130 PetriNetUnfolder]: For 10856/10928 co-relation queries the response was YES. [2021-12-21 15:15:53,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6358 conditions, 1704 events. 322/1704 cut-off events. For 10856/10928 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13181 event pairs, 231 based on Foata normal form. 1/1645 useless extension candidates. Maximal degree in co-relation 6190. Up to 732 conditions per place. [2021-12-21 15:15:53,368 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 83 selfloop transitions, 18 changer transitions 40/290 dead transitions. [2021-12-21 15:15:53,368 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 290 transitions, 2504 flow [2021-12-21 15:15:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 15:15:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-21 15:15:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3319 transitions. [2021-12-21 15:15:53,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7629885057471264 [2021-12-21 15:15:53,373 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3319 transitions. [2021-12-21 15:15:53,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3319 transitions. [2021-12-21 15:15:53,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:53,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3319 transitions. [2021-12-21 15:15:53,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 132.76) internal successors, (3319), 25 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:53,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:53,386 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:53,386 INFO L186 Difference]: Start difference. First operand has 261 places, 208 transitions, 1147 flow. Second operand 25 states and 3319 transitions. [2021-12-21 15:15:53,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 290 transitions, 2504 flow [2021-12-21 15:15:53,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 290 transitions, 2291 flow, removed 100 selfloop flow, removed 12 redundant places. [2021-12-21 15:15:53,425 INFO L242 Difference]: Finished difference. Result has 277 places, 223 transitions, 1423 flow [2021-12-21 15:15:53,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1423, PETRI_PLACES=277, PETRI_TRANSITIONS=223} [2021-12-21 15:15:53,426 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 120 predicate places. [2021-12-21 15:15:53,426 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 223 transitions, 1423 flow [2021-12-21 15:15:53,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:53,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:53,427 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:53,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 15:15:53,427 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash 805415252, now seen corresponding path program 4 times [2021-12-21 15:15:53,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890110466] [2021-12-21 15:15:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:53,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:53,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:53,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890110466] [2021-12-21 15:15:53,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890110466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:53,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:53,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:53,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117451597] [2021-12-21 15:15:53,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:53,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:53,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:53,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:53,521 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 223 transitions, 1423 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:53,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:53,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:53,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:54,121 INFO L129 PetriNetUnfolder]: 319/1719 cut-off events. [2021-12-21 15:15:54,121 INFO L130 PetriNetUnfolder]: For 14794/14868 co-relation queries the response was YES. [2021-12-21 15:15:54,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6996 conditions, 1719 events. 319/1719 cut-off events. For 14794/14868 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13506 event pairs, 218 based on Foata normal form. 1/1659 useless extension candidates. Maximal degree in co-relation 6824. Up to 686 conditions per place. [2021-12-21 15:15:54,138 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 117 selfloop transitions, 17 changer transitions 50/333 dead transitions. [2021-12-21 15:15:54,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 333 transitions, 3170 flow [2021-12-21 15:15:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 15:15:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-21 15:15:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3976 transitions. [2021-12-21 15:15:54,142 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7616858237547893 [2021-12-21 15:15:54,142 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3976 transitions. [2021-12-21 15:15:54,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3976 transitions. [2021-12-21 15:15:54,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:54,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3976 transitions. [2021-12-21 15:15:54,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 132.53333333333333) internal successors, (3976), 30 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:54,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:54,154 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:54,154 INFO L186 Difference]: Start difference. First operand has 277 places, 223 transitions, 1423 flow. Second operand 30 states and 3976 transitions. [2021-12-21 15:15:54,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 333 transitions, 3170 flow [2021-12-21 15:15:54,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 333 transitions, 2710 flow, removed 230 selfloop flow, removed 10 redundant places. [2021-12-21 15:15:54,202 INFO L242 Difference]: Finished difference. Result has 308 places, 226 transitions, 1451 flow [2021-12-21 15:15:54,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1451, PETRI_PLACES=308, PETRI_TRANSITIONS=226} [2021-12-21 15:15:54,203 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 151 predicate places. [2021-12-21 15:15:54,204 INFO L470 AbstractCegarLoop]: Abstraction has has 308 places, 226 transitions, 1451 flow [2021-12-21 15:15:54,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:54,204 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:54,204 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:54,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 15:15:54,205 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash 763934422, now seen corresponding path program 5 times [2021-12-21 15:15:54,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:54,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220879681] [2021-12-21 15:15:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:54,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:54,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220879681] [2021-12-21 15:15:54,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220879681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:54,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:54,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:54,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938815670] [2021-12-21 15:15:54,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:54,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:54,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:54,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:54,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:54,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:54,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 226 transitions, 1451 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:54,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:54,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:54,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:54,968 INFO L129 PetriNetUnfolder]: 335/1750 cut-off events. [2021-12-21 15:15:54,968 INFO L130 PetriNetUnfolder]: For 16745/16815 co-relation queries the response was YES. [2021-12-21 15:15:54,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 1750 events. 335/1750 cut-off events. For 16745/16815 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 13687 event pairs, 224 based on Foata normal form. 1/1688 useless extension candidates. Maximal degree in co-relation 7224. Up to 728 conditions per place. [2021-12-21 15:15:54,989 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 93 selfloop transitions, 29 changer transitions 41/312 dead transitions. [2021-12-21 15:15:54,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 312 transitions, 2843 flow [2021-12-21 15:15:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 15:15:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-21 15:15:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3705 transitions. [2021-12-21 15:15:54,994 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7604679802955665 [2021-12-21 15:15:54,994 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3705 transitions. [2021-12-21 15:15:54,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3705 transitions. [2021-12-21 15:15:54,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:54,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3705 transitions. [2021-12-21 15:15:55,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 132.32142857142858) internal successors, (3705), 28 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,006 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,006 INFO L186 Difference]: Start difference. First operand has 308 places, 226 transitions, 1451 flow. Second operand 28 states and 3705 transitions. [2021-12-21 15:15:55,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 312 transitions, 2843 flow [2021-12-21 15:15:55,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 312 transitions, 2619 flow, removed 110 selfloop flow, removed 24 redundant places. [2021-12-21 15:15:55,073 INFO L242 Difference]: Finished difference. Result has 306 places, 240 transitions, 1660 flow [2021-12-21 15:15:55,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1660, PETRI_PLACES=306, PETRI_TRANSITIONS=240} [2021-12-21 15:15:55,073 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 149 predicate places. [2021-12-21 15:15:55,074 INFO L470 AbstractCegarLoop]: Abstraction has has 306 places, 240 transitions, 1660 flow [2021-12-21 15:15:55,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:55,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:55,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 15:15:55,075 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1349135860, now seen corresponding path program 6 times [2021-12-21 15:15:55,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:55,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034959474] [2021-12-21 15:15:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:55,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:55,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:55,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034959474] [2021-12-21 15:15:55,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034959474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:55,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:55,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:55,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436120975] [2021-12-21 15:15:55,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:55,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:55,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:55,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:55,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:55,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 240 transitions, 1660 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:55,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:55,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:55,800 INFO L129 PetriNetUnfolder]: 353/1796 cut-off events. [2021-12-21 15:15:55,801 INFO L130 PetriNetUnfolder]: For 13438/13512 co-relation queries the response was YES. [2021-12-21 15:15:55,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7466 conditions, 1796 events. 353/1796 cut-off events. For 13438/13512 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 14124 event pairs, 247 based on Foata normal form. 3/1733 useless extension candidates. Maximal degree in co-relation 7274. Up to 742 conditions per place. [2021-12-21 15:15:55,821 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 93 selfloop transitions, 35 changer transitions 41/318 dead transitions. [2021-12-21 15:15:55,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 318 transitions, 3045 flow [2021-12-21 15:15:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 15:15:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-21 15:15:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3452 transitions. [2021-12-21 15:15:55,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7630415561450045 [2021-12-21 15:15:55,824 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3452 transitions. [2021-12-21 15:15:55,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3452 transitions. [2021-12-21 15:15:55,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:55,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3452 transitions. [2021-12-21 15:15:55,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 132.76923076923077) internal successors, (3452), 26 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,834 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,834 INFO L186 Difference]: Start difference. First operand has 306 places, 240 transitions, 1660 flow. Second operand 26 states and 3452 transitions. [2021-12-21 15:15:55,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 318 transitions, 3045 flow [2021-12-21 15:15:55,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 318 transitions, 2821 flow, removed 103 selfloop flow, removed 18 redundant places. [2021-12-21 15:15:55,897 INFO L242 Difference]: Finished difference. Result has 316 places, 254 transitions, 1929 flow [2021-12-21 15:15:55,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1929, PETRI_PLACES=316, PETRI_TRANSITIONS=254} [2021-12-21 15:15:55,898 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 159 predicate places. [2021-12-21 15:15:55,898 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 254 transitions, 1929 flow [2021-12-21 15:15:55,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:55,899 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:55,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 15:15:55,899 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1491611390, now seen corresponding path program 7 times [2021-12-21 15:15:55,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:55,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988520853] [2021-12-21 15:15:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:55,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:55,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:55,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988520853] [2021-12-21 15:15:55,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988520853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:55,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:55,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:55,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621605435] [2021-12-21 15:15:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:55,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:55,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:55,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:55,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 254 transitions, 1929 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:55,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:55,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:55,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:56,554 INFO L129 PetriNetUnfolder]: 347/1785 cut-off events. [2021-12-21 15:15:56,554 INFO L130 PetriNetUnfolder]: For 12004/12083 co-relation queries the response was YES. [2021-12-21 15:15:56,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7272 conditions, 1785 events. 347/1785 cut-off events. For 12004/12083 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 14085 event pairs, 230 based on Foata normal form. 2/1720 useless extension candidates. Maximal degree in co-relation 7081. Up to 750 conditions per place. [2021-12-21 15:15:56,574 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 104 selfloop transitions, 39 changer transitions 37/329 dead transitions. [2021-12-21 15:15:56,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 329 transitions, 3436 flow [2021-12-21 15:15:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:15:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:15:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2923 transitions. [2021-12-21 15:15:56,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635841170323929 [2021-12-21 15:15:56,578 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2923 transitions. [2021-12-21 15:15:56,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2923 transitions. [2021-12-21 15:15:56,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:56,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2923 transitions. [2021-12-21 15:15:56,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.86363636363637) internal successors, (2923), 22 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:56,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:56,586 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:56,586 INFO L186 Difference]: Start difference. First operand has 316 places, 254 transitions, 1929 flow. Second operand 22 states and 2923 transitions. [2021-12-21 15:15:56,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 329 transitions, 3436 flow [2021-12-21 15:15:56,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 329 transitions, 3237 flow, removed 79 selfloop flow, removed 13 redundant places. [2021-12-21 15:15:56,649 INFO L242 Difference]: Finished difference. Result has 324 places, 265 transitions, 2180 flow [2021-12-21 15:15:56,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2180, PETRI_PLACES=324, PETRI_TRANSITIONS=265} [2021-12-21 15:15:56,650 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 167 predicate places. [2021-12-21 15:15:56,650 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 265 transitions, 2180 flow [2021-12-21 15:15:56,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:56,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:56,650 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:56,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 15:15:56,651 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash 184070188, now seen corresponding path program 8 times [2021-12-21 15:15:56,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:56,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600081913] [2021-12-21 15:15:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:56,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:56,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:56,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600081913] [2021-12-21 15:15:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600081913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:56,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:56,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:56,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075814698] [2021-12-21 15:15:56,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:56,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:56,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:56,736 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:56,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 265 transitions, 2180 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:56,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:56,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:56,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:57,201 INFO L129 PetriNetUnfolder]: 342/1788 cut-off events. [2021-12-21 15:15:57,201 INFO L130 PetriNetUnfolder]: For 12321/12405 co-relation queries the response was YES. [2021-12-21 15:15:57,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7247 conditions, 1788 events. 342/1788 cut-off events. For 12321/12405 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 14084 event pairs, 228 based on Foata normal form. 9/1732 useless extension candidates. Maximal degree in co-relation 7046. Up to 744 conditions per place. [2021-12-21 15:15:57,221 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 100 selfloop transitions, 45 changer transitions 33/327 dead transitions. [2021-12-21 15:15:57,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 327 transitions, 3448 flow [2021-12-21 15:15:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:15:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:15:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2920 transitions. [2021-12-21 15:15:57,224 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7628004179728317 [2021-12-21 15:15:57,225 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2920 transitions. [2021-12-21 15:15:57,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2920 transitions. [2021-12-21 15:15:57,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:57,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2920 transitions. [2021-12-21 15:15:57,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.72727272727272) internal successors, (2920), 22 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:57,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:57,232 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:57,232 INFO L186 Difference]: Start difference. First operand has 324 places, 265 transitions, 2180 flow. Second operand 22 states and 2920 transitions. [2021-12-21 15:15:57,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 327 transitions, 3448 flow [2021-12-21 15:15:57,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 327 transitions, 3203 flow, removed 90 selfloop flow, removed 13 redundant places. [2021-12-21 15:15:57,303 INFO L242 Difference]: Finished difference. Result has 330 places, 272 transitions, 2298 flow [2021-12-21 15:15:57,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2298, PETRI_PLACES=330, PETRI_TRANSITIONS=272} [2021-12-21 15:15:57,303 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 173 predicate places. [2021-12-21 15:15:57,304 INFO L470 AbstractCegarLoop]: Abstraction has has 330 places, 272 transitions, 2298 flow [2021-12-21 15:15:57,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:57,304 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:57,304 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:57,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 15:15:57,305 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:57,305 INFO L85 PathProgramCache]: Analyzing trace with hash 951772256, now seen corresponding path program 9 times [2021-12-21 15:15:57,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:57,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114475743] [2021-12-21 15:15:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:57,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:57,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:57,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114475743] [2021-12-21 15:15:57,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114475743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:57,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:57,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:57,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023334496] [2021-12-21 15:15:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:57,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:57,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:57,403 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:57,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 272 transitions, 2298 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:57,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:57,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:57,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:58,055 INFO L129 PetriNetUnfolder]: 341/1793 cut-off events. [2021-12-21 15:15:58,055 INFO L130 PetriNetUnfolder]: For 12053/12134 co-relation queries the response was YES. [2021-12-21 15:15:58,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7278 conditions, 1793 events. 341/1793 cut-off events. For 12053/12134 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 14175 event pairs, 226 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 7077. Up to 732 conditions per place. [2021-12-21 15:15:58,078 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 109 selfloop transitions, 38 changer transitions 45/341 dead transitions. [2021-12-21 15:15:58,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 341 transitions, 3730 flow [2021-12-21 15:15:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 15:15:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-21 15:15:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3579 transitions. [2021-12-21 15:15:58,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7618135376756067 [2021-12-21 15:15:58,082 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3579 transitions. [2021-12-21 15:15:58,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3579 transitions. [2021-12-21 15:15:58,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:58,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3579 transitions. [2021-12-21 15:15:58,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 132.55555555555554) internal successors, (3579), 27 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,092 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,092 INFO L186 Difference]: Start difference. First operand has 330 places, 272 transitions, 2298 flow. Second operand 27 states and 3579 transitions. [2021-12-21 15:15:58,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 341 transitions, 3730 flow [2021-12-21 15:15:58,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 341 transitions, 3598 flow, removed 57 selfloop flow, removed 6 redundant places. [2021-12-21 15:15:58,170 INFO L242 Difference]: Finished difference. Result has 358 places, 275 transitions, 2444 flow [2021-12-21 15:15:58,170 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2444, PETRI_PLACES=358, PETRI_TRANSITIONS=275} [2021-12-21 15:15:58,171 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 201 predicate places. [2021-12-21 15:15:58,171 INFO L470 AbstractCegarLoop]: Abstraction has has 358 places, 275 transitions, 2444 flow [2021-12-21 15:15:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:58,172 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:58,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 15:15:58,172 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1137942998, now seen corresponding path program 10 times [2021-12-21 15:15:58,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:58,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681281926] [2021-12-21 15:15:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:58,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:58,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:58,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681281926] [2021-12-21 15:15:58,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681281926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:58,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:58,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:58,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414208450] [2021-12-21 15:15:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:58,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:58,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:58,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:58,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:58,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 275 transitions, 2444 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:58,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:58,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:58,796 INFO L129 PetriNetUnfolder]: 323/1726 cut-off events. [2021-12-21 15:15:58,796 INFO L130 PetriNetUnfolder]: For 11676/11750 co-relation queries the response was YES. [2021-12-21 15:15:58,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7039 conditions, 1726 events. 323/1726 cut-off events. For 11676/11750 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13494 event pairs, 226 based on Foata normal form. 3/1662 useless extension candidates. Maximal degree in co-relation 6878. Up to 736 conditions per place. [2021-12-21 15:15:58,820 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 97 selfloop transitions, 29 changer transitions 38/313 dead transitions. [2021-12-21 15:15:58,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 313 transitions, 3289 flow [2021-12-21 15:15:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:15:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-21 15:15:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2397 transitions. [2021-12-21 15:15:58,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7653256704980843 [2021-12-21 15:15:58,823 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2397 transitions. [2021-12-21 15:15:58,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2397 transitions. [2021-12-21 15:15:58,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:58,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2397 transitions. [2021-12-21 15:15:58,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 133.16666666666666) internal successors, (2397), 18 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,829 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,829 INFO L186 Difference]: Start difference. First operand has 358 places, 275 transitions, 2444 flow. Second operand 18 states and 2397 transitions. [2021-12-21 15:15:58,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 313 transitions, 3289 flow [2021-12-21 15:15:58,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 313 transitions, 3101 flow, removed 65 selfloop flow, removed 21 redundant places. [2021-12-21 15:15:58,915 INFO L242 Difference]: Finished difference. Result has 342 places, 255 transitions, 2035 flow [2021-12-21 15:15:58,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2035, PETRI_PLACES=342, PETRI_TRANSITIONS=255} [2021-12-21 15:15:58,915 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 185 predicate places. [2021-12-21 15:15:58,916 INFO L470 AbstractCegarLoop]: Abstraction has has 342 places, 255 transitions, 2035 flow [2021-12-21 15:15:58,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:58,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:58,916 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:58,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 15:15:58,917 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash 518182422, now seen corresponding path program 11 times [2021-12-21 15:15:58,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:58,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025628976] [2021-12-21 15:15:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:58,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:59,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:59,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025628976] [2021-12-21 15:15:59,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025628976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:59,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:59,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:59,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633840099] [2021-12-21 15:15:59,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:59,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:59,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:59,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:59,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 255 transitions, 2035 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:59,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:59,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:59,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:15:59,555 INFO L129 PetriNetUnfolder]: 326/1734 cut-off events. [2021-12-21 15:15:59,555 INFO L130 PetriNetUnfolder]: For 10912/10986 co-relation queries the response was YES. [2021-12-21 15:15:59,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6970 conditions, 1734 events. 326/1734 cut-off events. For 10912/10986 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13593 event pairs, 228 based on Foata normal form. 3/1672 useless extension candidates. Maximal degree in co-relation 6870. Up to 736 conditions per place. [2021-12-21 15:15:59,570 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 92 selfloop transitions, 36 changer transitions 30/307 dead transitions. [2021-12-21 15:15:59,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 307 transitions, 3109 flow [2021-12-21 15:15:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:15:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:15:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2661 transitions. [2021-12-21 15:15:59,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7646551724137931 [2021-12-21 15:15:59,573 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2661 transitions. [2021-12-21 15:15:59,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2661 transitions. [2021-12-21 15:15:59,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:15:59,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2661 transitions. [2021-12-21 15:15:59,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.05) internal successors, (2661), 20 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:59,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:59,579 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:59,579 INFO L186 Difference]: Start difference. First operand has 342 places, 255 transitions, 2035 flow. Second operand 20 states and 2661 transitions. [2021-12-21 15:15:59,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 307 transitions, 3109 flow [2021-12-21 15:15:59,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 307 transitions, 2850 flow, removed 35 selfloop flow, removed 22 redundant places. [2021-12-21 15:15:59,640 INFO L242 Difference]: Finished difference. Result has 324 places, 264 transitions, 2149 flow [2021-12-21 15:15:59,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2149, PETRI_PLACES=324, PETRI_TRANSITIONS=264} [2021-12-21 15:15:59,640 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 167 predicate places. [2021-12-21 15:15:59,641 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 264 transitions, 2149 flow [2021-12-21 15:15:59,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:59,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:15:59,641 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:15:59,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 15:15:59,641 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:15:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:15:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1058941744, now seen corresponding path program 12 times [2021-12-21 15:15:59,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:15:59,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998885631] [2021-12-21 15:15:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:15:59,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:15:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:15:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:15:59,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:15:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998885631] [2021-12-21 15:15:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998885631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:15:59,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:15:59,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:15:59,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211693045] [2021-12-21 15:15:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:15:59,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:15:59,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:15:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:15:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:15:59,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:15:59,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 264 transitions, 2149 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:15:59,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:15:59,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:15:59,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:00,265 INFO L129 PetriNetUnfolder]: 323/1729 cut-off events. [2021-12-21 15:16:00,265 INFO L130 PetriNetUnfolder]: For 9795/9869 co-relation queries the response was YES. [2021-12-21 15:16:00,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6742 conditions, 1729 events. 323/1729 cut-off events. For 9795/9869 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 13600 event pairs, 227 based on Foata normal form. 3/1667 useless extension candidates. Maximal degree in co-relation 6647. Up to 736 conditions per place. [2021-12-21 15:16:00,284 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 93 selfloop transitions, 37 changer transitions 31/310 dead transitions. [2021-12-21 15:16:00,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 310 transitions, 3093 flow [2021-12-21 15:16:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2532 transitions. [2021-12-21 15:16:00,287 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7658802177858439 [2021-12-21 15:16:00,287 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2532 transitions. [2021-12-21 15:16:00,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2532 transitions. [2021-12-21 15:16:00,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:00,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2532 transitions. [2021-12-21 15:16:00,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.26315789473685) internal successors, (2532), 19 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,293 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,293 INFO L186 Difference]: Start difference. First operand has 324 places, 264 transitions, 2149 flow. Second operand 19 states and 2532 transitions. [2021-12-21 15:16:00,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 310 transitions, 3093 flow [2021-12-21 15:16:00,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 310 transitions, 2966 flow, removed 43 selfloop flow, removed 7 redundant places. [2021-12-21 15:16:00,356 INFO L242 Difference]: Finished difference. Result has 334 places, 267 transitions, 2231 flow [2021-12-21 15:16:00,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2231, PETRI_PLACES=334, PETRI_TRANSITIONS=267} [2021-12-21 15:16:00,357 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 177 predicate places. [2021-12-21 15:16:00,357 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 267 transitions, 2231 flow [2021-12-21 15:16:00,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:00,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:00,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 15:16:00,357 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:00,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash -8065022, now seen corresponding path program 13 times [2021-12-21 15:16:00,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:00,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979607806] [2021-12-21 15:16:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:00,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:00,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:00,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979607806] [2021-12-21 15:16:00,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979607806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:00,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:00,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:00,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046677571] [2021-12-21 15:16:00,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:00,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:00,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:00,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:00,445 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:00,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 267 transitions, 2231 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:00,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:00,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:00,914 INFO L129 PetriNetUnfolder]: 322/1724 cut-off events. [2021-12-21 15:16:00,914 INFO L130 PetriNetUnfolder]: For 9816/9898 co-relation queries the response was YES. [2021-12-21 15:16:00,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6649 conditions, 1724 events. 322/1724 cut-off events. For 9816/9898 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 13466 event pairs, 227 based on Foata normal form. 3/1662 useless extension candidates. Maximal degree in co-relation 6550. Up to 734 conditions per place. [2021-12-21 15:16:00,933 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 93 selfloop transitions, 27 changer transitions 41/310 dead transitions. [2021-12-21 15:16:00,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 310 transitions, 3066 flow [2021-12-21 15:16:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:16:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:16:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2790 transitions. [2021-12-21 15:16:00,943 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635467980295566 [2021-12-21 15:16:00,943 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2790 transitions. [2021-12-21 15:16:00,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2790 transitions. [2021-12-21 15:16:00,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:00,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2790 transitions. [2021-12-21 15:16:00,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.85714285714286) internal successors, (2790), 21 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,950 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:00,950 INFO L186 Difference]: Start difference. First operand has 334 places, 267 transitions, 2231 flow. Second operand 21 states and 2790 transitions. [2021-12-21 15:16:00,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 310 transitions, 3066 flow [2021-12-21 15:16:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 310 transitions, 2939 flow, removed 26 selfloop flow, removed 8 redundant places. [2021-12-21 15:16:01,015 INFO L242 Difference]: Finished difference. Result has 346 places, 258 transitions, 2031 flow [2021-12-21 15:16:01,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2031, PETRI_PLACES=346, PETRI_TRANSITIONS=258} [2021-12-21 15:16:01,016 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 189 predicate places. [2021-12-21 15:16:01,016 INFO L470 AbstractCegarLoop]: Abstraction has has 346 places, 258 transitions, 2031 flow [2021-12-21 15:16:01,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:01,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:01,017 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:01,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 15:16:01,017 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:01,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1927747958, now seen corresponding path program 14 times [2021-12-21 15:16:01,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:01,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915283191] [2021-12-21 15:16:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:01,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:01,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:01,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915283191] [2021-12-21 15:16:01,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915283191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:01,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:01,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:01,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159896392] [2021-12-21 15:16:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:01,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:01,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:01,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:01,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 258 transitions, 2031 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:01,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:01,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:01,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:01,621 INFO L129 PetriNetUnfolder]: 309/1672 cut-off events. [2021-12-21 15:16:01,621 INFO L130 PetriNetUnfolder]: For 9541/9622 co-relation queries the response was YES. [2021-12-21 15:16:01,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6333 conditions, 1672 events. 309/1672 cut-off events. For 9541/9622 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12976 event pairs, 224 based on Foata normal form. 3/1612 useless extension candidates. Maximal degree in co-relation 6230. Up to 722 conditions per place. [2021-12-21 15:16:01,636 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 82 selfloop transitions, 14 changer transitions 43/288 dead transitions. [2021-12-21 15:16:01,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 288 transitions, 2632 flow [2021-12-21 15:16:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2910 transitions. [2021-12-21 15:16:01,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7601880877742947 [2021-12-21 15:16:01,638 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2910 transitions. [2021-12-21 15:16:01,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2910 transitions. [2021-12-21 15:16:01,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:01,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2910 transitions. [2021-12-21 15:16:01,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.27272727272728) internal successors, (2910), 22 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:01,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:01,644 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:01,644 INFO L186 Difference]: Start difference. First operand has 346 places, 258 transitions, 2031 flow. Second operand 22 states and 2910 transitions. [2021-12-21 15:16:01,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 288 transitions, 2632 flow [2021-12-21 15:16:01,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 288 transitions, 2447 flow, removed 38 selfloop flow, removed 26 redundant places. [2021-12-21 15:16:01,696 INFO L242 Difference]: Finished difference. Result has 329 places, 235 transitions, 1594 flow [2021-12-21 15:16:01,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1594, PETRI_PLACES=329, PETRI_TRANSITIONS=235} [2021-12-21 15:16:01,697 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 172 predicate places. [2021-12-21 15:16:01,697 INFO L470 AbstractCegarLoop]: Abstraction has has 329 places, 235 transitions, 1594 flow [2021-12-21 15:16:01,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:01,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:01,697 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:01,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 15:16:01,697 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1376564854, now seen corresponding path program 15 times [2021-12-21 15:16:01,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:01,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810059712] [2021-12-21 15:16:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:01,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:01,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:01,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810059712] [2021-12-21 15:16:01,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810059712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:01,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:01,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:01,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417717936] [2021-12-21 15:16:01,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:01,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:01,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:01,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:01,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:01,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 235 transitions, 1594 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:01,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:01,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:01,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:02,282 INFO L129 PetriNetUnfolder]: 318/1696 cut-off events. [2021-12-21 15:16:02,283 INFO L130 PetriNetUnfolder]: For 9351/9426 co-relation queries the response was YES. [2021-12-21 15:16:02,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6412 conditions, 1696 events. 318/1696 cut-off events. For 9351/9426 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 13162 event pairs, 234 based on Foata normal form. 1/1633 useless extension candidates. Maximal degree in co-relation 6318. Up to 722 conditions per place. [2021-12-21 15:16:02,300 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 87 selfloop transitions, 26 changer transitions 35/297 dead transitions. [2021-12-21 15:16:02,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 297 transitions, 2701 flow [2021-12-21 15:16:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:16:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:16:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3186 transitions. [2021-12-21 15:16:02,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7629310344827587 [2021-12-21 15:16:02,303 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3186 transitions. [2021-12-21 15:16:02,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3186 transitions. [2021-12-21 15:16:02,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:02,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3186 transitions. [2021-12-21 15:16:02,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.75) internal successors, (3186), 24 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,308 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,309 INFO L186 Difference]: Start difference. First operand has 329 places, 235 transitions, 1594 flow. Second operand 24 states and 3186 transitions. [2021-12-21 15:16:02,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 297 transitions, 2701 flow [2021-12-21 15:16:02,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 297 transitions, 2454 flow, removed 43 selfloop flow, removed 23 redundant places. [2021-12-21 15:16:02,359 INFO L242 Difference]: Finished difference. Result has 311 places, 246 transitions, 1738 flow [2021-12-21 15:16:02,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1738, PETRI_PLACES=311, PETRI_TRANSITIONS=246} [2021-12-21 15:16:02,360 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 154 predicate places. [2021-12-21 15:16:02,360 INFO L470 AbstractCegarLoop]: Abstraction has has 311 places, 246 transitions, 1738 flow [2021-12-21 15:16:02,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,360 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:02,360 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:02,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 15:16:02,361 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash 207788190, now seen corresponding path program 16 times [2021-12-21 15:16:02,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:02,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686740201] [2021-12-21 15:16:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:02,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:02,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:02,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686740201] [2021-12-21 15:16:02,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686740201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:02,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:02,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:02,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874348402] [2021-12-21 15:16:02,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:02,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:02,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:02,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:02,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:02,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 246 transitions, 1738 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:02,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:02,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:02,950 INFO L129 PetriNetUnfolder]: 314/1691 cut-off events. [2021-12-21 15:16:02,950 INFO L130 PetriNetUnfolder]: For 8770/8844 co-relation queries the response was YES. [2021-12-21 15:16:02,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6343 conditions, 1691 events. 314/1691 cut-off events. For 8770/8844 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 13201 event pairs, 230 based on Foata normal form. 3/1630 useless extension candidates. Maximal degree in co-relation 6250. Up to 724 conditions per place. [2021-12-21 15:16:02,967 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 86 selfloop transitions, 28 changer transitions 36/299 dead transitions. [2021-12-21 15:16:02,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 299 transitions, 2714 flow [2021-12-21 15:16:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 15:16:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-21 15:16:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3055 transitions. [2021-12-21 15:16:02,970 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.763368315842079 [2021-12-21 15:16:02,970 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3055 transitions. [2021-12-21 15:16:02,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3055 transitions. [2021-12-21 15:16:02,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:02,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3055 transitions. [2021-12-21 15:16:02,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.82608695652175) internal successors, (3055), 23 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,976 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:02,976 INFO L186 Difference]: Start difference. First operand has 311 places, 246 transitions, 1738 flow. Second operand 23 states and 3055 transitions. [2021-12-21 15:16:02,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 299 transitions, 2714 flow [2021-12-21 15:16:03,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 299 transitions, 2611 flow, removed 46 selfloop flow, removed 12 redundant places. [2021-12-21 15:16:03,024 INFO L242 Difference]: Finished difference. Result has 322 places, 250 transitions, 1880 flow [2021-12-21 15:16:03,024 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1880, PETRI_PLACES=322, PETRI_TRANSITIONS=250} [2021-12-21 15:16:03,024 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 165 predicate places. [2021-12-21 15:16:03,025 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 250 transitions, 1880 flow [2021-12-21 15:16:03,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:03,025 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:03,025 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:03,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 15:16:03,025 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash 305216672, now seen corresponding path program 17 times [2021-12-21 15:16:03,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:03,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507318276] [2021-12-21 15:16:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:03,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:03,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:03,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507318276] [2021-12-21 15:16:03,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507318276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:03,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:03,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:03,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989724548] [2021-12-21 15:16:03,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:03,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:03,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:03,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:03,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 250 transitions, 1880 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:03,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:03,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:03,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:03,595 INFO L129 PetriNetUnfolder]: 310/1678 cut-off events. [2021-12-21 15:16:03,595 INFO L130 PetriNetUnfolder]: For 8984/9059 co-relation queries the response was YES. [2021-12-21 15:16:03,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 1678 events. 310/1678 cut-off events. For 8984/9059 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13060 event pairs, 232 based on Foata normal form. 1/1615 useless extension candidates. Maximal degree in co-relation 6198. Up to 722 conditions per place. [2021-12-21 15:16:03,611 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 85 selfloop transitions, 30 changer transitions 30/294 dead transitions. [2021-12-21 15:16:03,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 294 transitions, 2745 flow [2021-12-21 15:16:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2664 transitions. [2021-12-21 15:16:03,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7655172413793103 [2021-12-21 15:16:03,613 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2664 transitions. [2021-12-21 15:16:03,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2664 transitions. [2021-12-21 15:16:03,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:03,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2664 transitions. [2021-12-21 15:16:03,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.2) internal successors, (2664), 20 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:03,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:03,618 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:03,619 INFO L186 Difference]: Start difference. First operand has 322 places, 250 transitions, 1880 flow. Second operand 20 states and 2664 transitions. [2021-12-21 15:16:03,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 294 transitions, 2745 flow [2021-12-21 15:16:03,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 294 transitions, 2597 flow, removed 52 selfloop flow, removed 14 redundant places. [2021-12-21 15:16:03,670 INFO L242 Difference]: Finished difference. Result has 322 places, 257 transitions, 1994 flow [2021-12-21 15:16:03,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1994, PETRI_PLACES=322, PETRI_TRANSITIONS=257} [2021-12-21 15:16:03,671 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 165 predicate places. [2021-12-21 15:16:03,671 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 257 transitions, 1994 flow [2021-12-21 15:16:03,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:03,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:03,671 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:03,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 15:16:03,672 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -547353468, now seen corresponding path program 18 times [2021-12-21 15:16:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:03,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095653566] [2021-12-21 15:16:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:03,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:03,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:03,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095653566] [2021-12-21 15:16:03,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095653566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:03,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:03,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:03,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322840559] [2021-12-21 15:16:03,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:03,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:03,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:03,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:03,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 257 transitions, 1994 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:03,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:03,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:03,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:04,187 INFO L129 PetriNetUnfolder]: 313/1688 cut-off events. [2021-12-21 15:16:04,187 INFO L130 PetriNetUnfolder]: For 9095/9170 co-relation queries the response was YES. [2021-12-21 15:16:04,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6396 conditions, 1688 events. 313/1688 cut-off events. For 9095/9170 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13159 event pairs, 232 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 6301. Up to 722 conditions per place. [2021-12-21 15:16:04,205 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 85 selfloop transitions, 38 changer transitions 30/302 dead transitions. [2021-12-21 15:16:04,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 302 transitions, 2908 flow [2021-12-21 15:16:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2533 transitions. [2021-12-21 15:16:04,207 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7661826981246219 [2021-12-21 15:16:04,207 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2533 transitions. [2021-12-21 15:16:04,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2533 transitions. [2021-12-21 15:16:04,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:04,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2533 transitions. [2021-12-21 15:16:04,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.31578947368422) internal successors, (2533), 19 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,212 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,212 INFO L186 Difference]: Start difference. First operand has 322 places, 257 transitions, 1994 flow. Second operand 19 states and 2533 transitions. [2021-12-21 15:16:04,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 302 transitions, 2908 flow [2021-12-21 15:16:04,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 302 transitions, 2789 flow, removed 37 selfloop flow, removed 7 redundant places. [2021-12-21 15:16:04,266 INFO L242 Difference]: Finished difference. Result has 333 places, 265 transitions, 2172 flow [2021-12-21 15:16:04,266 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2172, PETRI_PLACES=333, PETRI_TRANSITIONS=265} [2021-12-21 15:16:04,267 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 176 predicate places. [2021-12-21 15:16:04,267 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 265 transitions, 2172 flow [2021-12-21 15:16:04,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,267 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:04,267 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:04,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 15:16:04,268 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash -123208248, now seen corresponding path program 19 times [2021-12-21 15:16:04,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:04,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69429163] [2021-12-21 15:16:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:04,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:04,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:04,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69429163] [2021-12-21 15:16:04,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69429163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:04,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:04,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:04,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950724969] [2021-12-21 15:16:04,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:04,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:04,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:04,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:04,364 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:04,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 265 transitions, 2172 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:04,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:04,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:04,860 INFO L129 PetriNetUnfolder]: 310/1695 cut-off events. [2021-12-21 15:16:04,860 INFO L130 PetriNetUnfolder]: For 9184/9259 co-relation queries the response was YES. [2021-12-21 15:16:04,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6420 conditions, 1695 events. 310/1695 cut-off events. For 9184/9259 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13208 event pairs, 231 based on Foata normal form. 1/1632 useless extension candidates. Maximal degree in co-relation 6319. Up to 722 conditions per place. [2021-12-21 15:16:04,877 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 92 selfloop transitions, 34 changer transitions 31/306 dead transitions. [2021-12-21 15:16:04,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 306 transitions, 3048 flow [2021-12-21 15:16:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2664 transitions. [2021-12-21 15:16:04,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7655172413793103 [2021-12-21 15:16:04,879 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2664 transitions. [2021-12-21 15:16:04,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2664 transitions. [2021-12-21 15:16:04,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:04,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2664 transitions. [2021-12-21 15:16:04,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.2) internal successors, (2664), 20 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,884 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,884 INFO L186 Difference]: Start difference. First operand has 333 places, 265 transitions, 2172 flow. Second operand 20 states and 2664 transitions. [2021-12-21 15:16:04,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 306 transitions, 3048 flow [2021-12-21 15:16:04,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 306 transitions, 2928 flow, removed 23 selfloop flow, removed 9 redundant places. [2021-12-21 15:16:04,939 INFO L242 Difference]: Finished difference. Result has 343 places, 269 transitions, 2265 flow [2021-12-21 15:16:04,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2265, PETRI_PLACES=343, PETRI_TRANSITIONS=269} [2021-12-21 15:16:04,939 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 186 predicate places. [2021-12-21 15:16:04,940 INFO L470 AbstractCegarLoop]: Abstraction has has 343 places, 269 transitions, 2265 flow [2021-12-21 15:16:04,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:04,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:04,940 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:04,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 15:16:04,940 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash -85099410, now seen corresponding path program 20 times [2021-12-21 15:16:04,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246548457] [2021-12-21 15:16:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:04,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:05,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246548457] [2021-12-21 15:16:05,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246548457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:05,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:05,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:05,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082820585] [2021-12-21 15:16:05,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:05,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:05,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:05,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:05,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 269 transitions, 2265 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:05,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:05,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:05,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:05,535 INFO L129 PetriNetUnfolder]: 305/1689 cut-off events. [2021-12-21 15:16:05,536 INFO L130 PetriNetUnfolder]: For 9041/9116 co-relation queries the response was YES. [2021-12-21 15:16:05,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6319 conditions, 1689 events. 305/1689 cut-off events. For 9041/9116 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13211 event pairs, 232 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 6214. Up to 722 conditions per place. [2021-12-21 15:16:05,555 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 88 selfloop transitions, 19 changer transitions 44/300 dead transitions. [2021-12-21 15:16:05,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 300 transitions, 2909 flow [2021-12-21 15:16:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2663 transitions. [2021-12-21 15:16:05,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7652298850574712 [2021-12-21 15:16:05,557 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2663 transitions. [2021-12-21 15:16:05,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2663 transitions. [2021-12-21 15:16:05,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:05,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2663 transitions. [2021-12-21 15:16:05,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.15) internal successors, (2663), 20 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:05,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:05,562 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:05,562 INFO L186 Difference]: Start difference. First operand has 343 places, 269 transitions, 2265 flow. Second operand 20 states and 2663 transitions. [2021-12-21 15:16:05,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 300 transitions, 2909 flow [2021-12-21 15:16:05,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 300 transitions, 2812 flow, removed 27 selfloop flow, removed 7 redundant places. [2021-12-21 15:16:05,620 INFO L242 Difference]: Finished difference. Result has 352 places, 252 transitions, 1935 flow [2021-12-21 15:16:05,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1935, PETRI_PLACES=352, PETRI_TRANSITIONS=252} [2021-12-21 15:16:05,621 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 195 predicate places. [2021-12-21 15:16:05,621 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 252 transitions, 1935 flow [2021-12-21 15:16:05,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:05,621 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:05,621 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:05,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 15:16:05,622 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash 222130868, now seen corresponding path program 21 times [2021-12-21 15:16:05,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:05,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093163986] [2021-12-21 15:16:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:05,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:05,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093163986] [2021-12-21 15:16:05,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093163986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:05,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:05,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:05,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906662363] [2021-12-21 15:16:05,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:05,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:05,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:05,721 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:05,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 252 transitions, 1935 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:05,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:05,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:05,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:06,168 INFO L129 PetriNetUnfolder]: 300/1664 cut-off events. [2021-12-21 15:16:06,169 INFO L130 PetriNetUnfolder]: For 8941/9015 co-relation queries the response was YES. [2021-12-21 15:16:06,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6189 conditions, 1664 events. 300/1664 cut-off events. For 8941/9015 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12991 event pairs, 227 based on Foata normal form. 3/1603 useless extension candidates. Maximal degree in co-relation 6081. Up to 724 conditions per place. [2021-12-21 15:16:06,186 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 78 selfloop transitions, 20 changer transitions 40/287 dead transitions. [2021-12-21 15:16:06,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 287 transitions, 2635 flow [2021-12-21 15:16:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2919 transitions. [2021-12-21 15:16:06,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.762539184952978 [2021-12-21 15:16:06,188 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2919 transitions. [2021-12-21 15:16:06,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2919 transitions. [2021-12-21 15:16:06,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:06,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2919 transitions. [2021-12-21 15:16:06,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.6818181818182) internal successors, (2919), 22 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,193 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,193 INFO L186 Difference]: Start difference. First operand has 352 places, 252 transitions, 1935 flow. Second operand 22 states and 2919 transitions. [2021-12-21 15:16:06,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 287 transitions, 2635 flow [2021-12-21 15:16:06,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 287 transitions, 2434 flow, removed 32 selfloop flow, removed 26 redundant places. [2021-12-21 15:16:06,248 INFO L242 Difference]: Finished difference. Result has 333 places, 243 transitions, 1714 flow [2021-12-21 15:16:06,248 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1714, PETRI_PLACES=333, PETRI_TRANSITIONS=243} [2021-12-21 15:16:06,249 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 176 predicate places. [2021-12-21 15:16:06,249 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 243 transitions, 1714 flow [2021-12-21 15:16:06,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:06,249 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:06,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 15:16:06,250 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash 783451192, now seen corresponding path program 22 times [2021-12-21 15:16:06,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:06,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123508573] [2021-12-21 15:16:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:06,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:06,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:06,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123508573] [2021-12-21 15:16:06,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123508573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:06,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:06,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:06,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476761748] [2021-12-21 15:16:06,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:06,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:06,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:06,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:06,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:06,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 243 transitions, 1714 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:06,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:06,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:06,767 INFO L129 PetriNetUnfolder]: 287/1613 cut-off events. [2021-12-21 15:16:06,767 INFO L130 PetriNetUnfolder]: For 8051/8125 co-relation queries the response was YES. [2021-12-21 15:16:06,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5789 conditions, 1613 events. 287/1613 cut-off events. For 8051/8125 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12490 event pairs, 225 based on Foata normal form. 3/1554 useless extension candidates. Maximal degree in co-relation 5688. Up to 711 conditions per place. [2021-12-21 15:16:06,783 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 67 selfloop transitions, 4 changer transitions 44/264 dead transitions. [2021-12-21 15:16:06,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 264 transitions, 2134 flow [2021-12-21 15:16:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:16:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:16:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2778 transitions. [2021-12-21 15:16:06,786 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7602627257799671 [2021-12-21 15:16:06,786 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2778 transitions. [2021-12-21 15:16:06,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2778 transitions. [2021-12-21 15:16:06,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:06,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2778 transitions. [2021-12-21 15:16:06,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.28571428571428) internal successors, (2778), 21 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,790 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,790 INFO L186 Difference]: Start difference. First operand has 333 places, 243 transitions, 1714 flow. Second operand 21 states and 2778 transitions. [2021-12-21 15:16:06,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 264 transitions, 2134 flow [2021-12-21 15:16:06,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 264 transitions, 2013 flow, removed 28 selfloop flow, removed 23 redundant places. [2021-12-21 15:16:06,835 INFO L242 Difference]: Finished difference. Result has 315 places, 216 transitions, 1261 flow [2021-12-21 15:16:06,835 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1261, PETRI_PLACES=315, PETRI_TRANSITIONS=216} [2021-12-21 15:16:06,836 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 158 predicate places. [2021-12-21 15:16:06,836 INFO L470 AbstractCegarLoop]: Abstraction has has 315 places, 216 transitions, 1261 flow [2021-12-21 15:16:06,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,836 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:06,837 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:06,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 15:16:06,837 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1867892242, now seen corresponding path program 23 times [2021-12-21 15:16:06,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:06,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474704664] [2021-12-21 15:16:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:06,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:06,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474704664] [2021-12-21 15:16:06,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474704664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:06,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:06,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:06,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349888822] [2021-12-21 15:16:06,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:06,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:06,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:06,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:06,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:06,930 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:06,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 216 transitions, 1261 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:06,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:06,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:06,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:07,467 INFO L129 PetriNetUnfolder]: 304/1667 cut-off events. [2021-12-21 15:16:07,468 INFO L130 PetriNetUnfolder]: For 8039/8111 co-relation queries the response was YES. [2021-12-21 15:16:07,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5930 conditions, 1667 events. 304/1667 cut-off events. For 8039/8111 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12910 event pairs, 225 based on Foata normal form. 1/1610 useless extension candidates. Maximal degree in co-relation 5841. Up to 719 conditions per place. [2021-12-21 15:16:07,484 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 81 selfloop transitions, 23 changer transitions 42/295 dead transitions. [2021-12-21 15:16:07,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 295 transitions, 2433 flow [2021-12-21 15:16:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 15:16:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-21 15:16:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3705 transitions. [2021-12-21 15:16:07,486 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7604679802955665 [2021-12-21 15:16:07,486 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3705 transitions. [2021-12-21 15:16:07,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3705 transitions. [2021-12-21 15:16:07,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:07,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3705 transitions. [2021-12-21 15:16:07,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 132.32142857142858) internal successors, (3705), 28 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:07,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:07,492 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:07,492 INFO L186 Difference]: Start difference. First operand has 315 places, 216 transitions, 1261 flow. Second operand 28 states and 3705 transitions. [2021-12-21 15:16:07,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 295 transitions, 2433 flow [2021-12-21 15:16:07,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 295 transitions, 2284 flow, removed 40 selfloop flow, removed 21 redundant places. [2021-12-21 15:16:07,528 INFO L242 Difference]: Finished difference. Result has 302 places, 229 transitions, 1462 flow [2021-12-21 15:16:07,528 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1462, PETRI_PLACES=302, PETRI_TRANSITIONS=229} [2021-12-21 15:16:07,529 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 145 predicate places. [2021-12-21 15:16:07,529 INFO L470 AbstractCegarLoop]: Abstraction has has 302 places, 229 transitions, 1462 flow [2021-12-21 15:16:07,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:07,529 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:07,529 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:07,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 15:16:07,530 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1891662696, now seen corresponding path program 24 times [2021-12-21 15:16:07,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:07,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474220811] [2021-12-21 15:16:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:07,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:07,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:07,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474220811] [2021-12-21 15:16:07,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474220811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:07,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:07,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:07,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665732289] [2021-12-21 15:16:07,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:07,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:07,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:07,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:07,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 229 transitions, 1462 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:07,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:07,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:07,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:08,116 INFO L129 PetriNetUnfolder]: 301/1661 cut-off events. [2021-12-21 15:16:08,117 INFO L130 PetriNetUnfolder]: For 8174/8246 co-relation queries the response was YES. [2021-12-21 15:16:08,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5995 conditions, 1661 events. 301/1661 cut-off events. For 8174/8246 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12859 event pairs, 228 based on Foata normal form. 1/1599 useless extension candidates. Maximal degree in co-relation 5902. Up to 717 conditions per place. [2021-12-21 15:16:08,133 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 77 selfloop transitions, 25 changer transitions 42/293 dead transitions. [2021-12-21 15:16:08,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 293 transitions, 2560 flow [2021-12-21 15:16:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 15:16:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-21 15:16:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3572 transitions. [2021-12-21 15:16:08,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7603235419327373 [2021-12-21 15:16:08,137 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3572 transitions. [2021-12-21 15:16:08,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3572 transitions. [2021-12-21 15:16:08,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:08,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3572 transitions. [2021-12-21 15:16:08,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 132.2962962962963) internal successors, (3572), 27 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,142 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,142 INFO L186 Difference]: Start difference. First operand has 302 places, 229 transitions, 1462 flow. Second operand 27 states and 3572 transitions. [2021-12-21 15:16:08,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 293 transitions, 2560 flow [2021-12-21 15:16:08,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 293 transitions, 2398 flow, removed 73 selfloop flow, removed 17 redundant places. [2021-12-21 15:16:08,182 INFO L242 Difference]: Finished difference. Result has 313 places, 233 transitions, 1608 flow [2021-12-21 15:16:08,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1608, PETRI_PLACES=313, PETRI_TRANSITIONS=233} [2021-12-21 15:16:08,183 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 156 predicate places. [2021-12-21 15:16:08,183 INFO L470 AbstractCegarLoop]: Abstraction has has 313 places, 233 transitions, 1608 flow [2021-12-21 15:16:08,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:08,183 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:08,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 15:16:08,183 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1489406044, now seen corresponding path program 25 times [2021-12-21 15:16:08,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:08,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746882793] [2021-12-21 15:16:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:08,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:08,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:08,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746882793] [2021-12-21 15:16:08,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746882793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:08,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:08,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:08,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814435533] [2021-12-21 15:16:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:08,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:08,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:08,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:08,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 233 transitions, 1608 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:08,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:08,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:08,793 INFO L129 PetriNetUnfolder]: 296/1635 cut-off events. [2021-12-21 15:16:08,793 INFO L130 PetriNetUnfolder]: For 8844/8916 co-relation queries the response was YES. [2021-12-21 15:16:08,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6035 conditions, 1635 events. 296/1635 cut-off events. For 8844/8916 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12597 event pairs, 223 based on Foata normal form. 1/1574 useless extension candidates. Maximal degree in co-relation 5936. Up to 719 conditions per place. [2021-12-21 15:16:08,808 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 79 selfloop transitions, 27 changer transitions 37/292 dead transitions. [2021-12-21 15:16:08,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 292 transitions, 2659 flow [2021-12-21 15:16:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:16:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:16:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3183 transitions. [2021-12-21 15:16:08,810 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7622126436781609 [2021-12-21 15:16:08,810 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3183 transitions. [2021-12-21 15:16:08,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3183 transitions. [2021-12-21 15:16:08,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:08,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3183 transitions. [2021-12-21 15:16:08,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.625) internal successors, (3183), 24 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,815 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,815 INFO L186 Difference]: Start difference. First operand has 313 places, 233 transitions, 1608 flow. Second operand 24 states and 3183 transitions. [2021-12-21 15:16:08,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 292 transitions, 2659 flow [2021-12-21 15:16:08,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 292 transitions, 2435 flow, removed 93 selfloop flow, removed 20 redundant places. [2021-12-21 15:16:08,854 INFO L242 Difference]: Finished difference. Result has 312 places, 240 transitions, 1718 flow [2021-12-21 15:16:08,855 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1718, PETRI_PLACES=312, PETRI_TRANSITIONS=240} [2021-12-21 15:16:08,855 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 155 predicate places. [2021-12-21 15:16:08,855 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 240 transitions, 1718 flow [2021-12-21 15:16:08,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,856 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:08,856 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:08,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 15:16:08,856 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash -647839046, now seen corresponding path program 26 times [2021-12-21 15:16:08,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:08,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681382187] [2021-12-21 15:16:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:08,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:08,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:08,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681382187] [2021-12-21 15:16:08,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681382187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:08,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:08,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:08,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346908324] [2021-12-21 15:16:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:08,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:08,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:08,943 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:08,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 240 transitions, 1718 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:08,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:08,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:08,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:09,425 INFO L129 PetriNetUnfolder]: 305/1669 cut-off events. [2021-12-21 15:16:09,426 INFO L130 PetriNetUnfolder]: For 8134/8206 co-relation queries the response was YES. [2021-12-21 15:16:09,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6144 conditions, 1669 events. 305/1669 cut-off events. For 8134/8206 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12936 event pairs, 231 based on Foata normal form. 1/1606 useless extension candidates. Maximal degree in co-relation 6048. Up to 725 conditions per place. [2021-12-21 15:16:09,441 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 76 selfloop transitions, 37 changer transitions 36/298 dead transitions. [2021-12-21 15:16:09,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 298 transitions, 2788 flow [2021-12-21 15:16:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 15:16:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-21 15:16:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3050 transitions. [2021-12-21 15:16:09,445 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7621189405297352 [2021-12-21 15:16:09,445 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3050 transitions. [2021-12-21 15:16:09,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3050 transitions. [2021-12-21 15:16:09,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:09,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3050 transitions. [2021-12-21 15:16:09,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.6086956521739) internal successors, (3050), 23 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:09,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:09,449 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:09,449 INFO L186 Difference]: Start difference. First operand has 312 places, 240 transitions, 1718 flow. Second operand 23 states and 3050 transitions. [2021-12-21 15:16:09,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 298 transitions, 2788 flow [2021-12-21 15:16:09,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 298 transitions, 2608 flow, removed 73 selfloop flow, removed 13 redundant places. [2021-12-21 15:16:09,492 INFO L242 Difference]: Finished difference. Result has 322 places, 250 transitions, 1926 flow [2021-12-21 15:16:09,493 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1926, PETRI_PLACES=322, PETRI_TRANSITIONS=250} [2021-12-21 15:16:09,493 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 165 predicate places. [2021-12-21 15:16:09,493 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 250 transitions, 1926 flow [2021-12-21 15:16:09,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:09,494 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:09,494 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:09,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 15:16:09,494 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1822088480, now seen corresponding path program 27 times [2021-12-21 15:16:09,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:09,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738569341] [2021-12-21 15:16:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:09,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:09,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738569341] [2021-12-21 15:16:09,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738569341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:09,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:09,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:09,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124154809] [2021-12-21 15:16:09,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:09,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:09,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:09,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:09,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 250 transitions, 1926 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:09,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:09,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:09,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:10,100 INFO L129 PetriNetUnfolder]: 302/1653 cut-off events. [2021-12-21 15:16:10,101 INFO L130 PetriNetUnfolder]: For 8380/8452 co-relation queries the response was YES. [2021-12-21 15:16:10,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6174 conditions, 1653 events. 302/1653 cut-off events. For 8380/8452 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12773 event pairs, 226 based on Foata normal form. 1/1591 useless extension candidates. Maximal degree in co-relation 6073. Up to 723 conditions per place. [2021-12-21 15:16:10,117 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 85 selfloop transitions, 33 changer transitions 37/304 dead transitions. [2021-12-21 15:16:10,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 304 transitions, 3005 flow [2021-12-21 15:16:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:16:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:16:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3183 transitions. [2021-12-21 15:16:10,118 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7622126436781609 [2021-12-21 15:16:10,119 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3183 transitions. [2021-12-21 15:16:10,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3183 transitions. [2021-12-21 15:16:10,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:10,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3183 transitions. [2021-12-21 15:16:10,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.625) internal successors, (3183), 24 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,123 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,123 INFO L186 Difference]: Start difference. First operand has 322 places, 250 transitions, 1926 flow. Second operand 24 states and 3183 transitions. [2021-12-21 15:16:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 304 transitions, 3005 flow [2021-12-21 15:16:10,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 304 transitions, 2797 flow, removed 74 selfloop flow, removed 15 redundant places. [2021-12-21 15:16:10,168 INFO L242 Difference]: Finished difference. Result has 331 places, 254 transitions, 2023 flow [2021-12-21 15:16:10,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2023, PETRI_PLACES=331, PETRI_TRANSITIONS=254} [2021-12-21 15:16:10,168 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 174 predicate places. [2021-12-21 15:16:10,169 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 254 transitions, 2023 flow [2021-12-21 15:16:10,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:10,169 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:10,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 15:16:10,169 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1024266032, now seen corresponding path program 28 times [2021-12-21 15:16:10,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:10,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242491914] [2021-12-21 15:16:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:10,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:10,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242491914] [2021-12-21 15:16:10,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242491914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:10,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:10,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:10,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068323847] [2021-12-21 15:16:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:10,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:10,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:10,268 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:10,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 254 transitions, 2023 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:10,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:10,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:10,676 INFO L129 PetriNetUnfolder]: 297/1655 cut-off events. [2021-12-21 15:16:10,677 INFO L130 PetriNetUnfolder]: For 7977/8049 co-relation queries the response was YES. [2021-12-21 15:16:10,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6056 conditions, 1655 events. 297/1655 cut-off events. For 7977/8049 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12792 event pairs, 223 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 5952. Up to 725 conditions per place. [2021-12-21 15:16:10,697 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 82 selfloop transitions, 35 changer transitions 32/298 dead transitions. [2021-12-21 15:16:10,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 298 transitions, 2863 flow [2021-12-21 15:16:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2661 transitions. [2021-12-21 15:16:10,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7646551724137931 [2021-12-21 15:16:10,699 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2661 transitions. [2021-12-21 15:16:10,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2661 transitions. [2021-12-21 15:16:10,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:10,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2661 transitions. [2021-12-21 15:16:10,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.05) internal successors, (2661), 20 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,706 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,706 INFO L186 Difference]: Start difference. First operand has 331 places, 254 transitions, 2023 flow. Second operand 20 states and 2661 transitions. [2021-12-21 15:16:10,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 298 transitions, 2863 flow [2021-12-21 15:16:10,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 298 transitions, 2721 flow, removed 56 selfloop flow, removed 12 redundant places. [2021-12-21 15:16:10,749 INFO L242 Difference]: Finished difference. Result has 332 places, 261 transitions, 2146 flow [2021-12-21 15:16:10,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2146, PETRI_PLACES=332, PETRI_TRANSITIONS=261} [2021-12-21 15:16:10,750 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 175 predicate places. [2021-12-21 15:16:10,750 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 261 transitions, 2146 flow [2021-12-21 15:16:10,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:10,750 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:10,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 15:16:10,750 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1918909020, now seen corresponding path program 29 times [2021-12-21 15:16:10,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:10,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071012614] [2021-12-21 15:16:10,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:10,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:10,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071012614] [2021-12-21 15:16:10,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071012614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:10,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:10,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:10,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223436572] [2021-12-21 15:16:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:10,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:10,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:10,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:10,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 261 transitions, 2146 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:10,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:10,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:10,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:11,318 INFO L129 PetriNetUnfolder]: 294/1655 cut-off events. [2021-12-21 15:16:11,319 INFO L130 PetriNetUnfolder]: For 7297/7369 co-relation queries the response was YES. [2021-12-21 15:16:11,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5947 conditions, 1655 events. 294/1655 cut-off events. For 7297/7369 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12874 event pairs, 222 based on Foata normal form. 1/1593 useless extension candidates. Maximal degree in co-relation 5844. Up to 723 conditions per place. [2021-12-21 15:16:11,337 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 87 selfloop transitions, 35 changer transitions 31/302 dead transitions. [2021-12-21 15:16:11,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 302 transitions, 2990 flow [2021-12-21 15:16:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2661 transitions. [2021-12-21 15:16:11,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7646551724137931 [2021-12-21 15:16:11,339 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2661 transitions. [2021-12-21 15:16:11,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2661 transitions. [2021-12-21 15:16:11,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:11,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2661 transitions. [2021-12-21 15:16:11,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.05) internal successors, (2661), 20 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,343 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,343 INFO L186 Difference]: Start difference. First operand has 332 places, 261 transitions, 2146 flow. Second operand 20 states and 2661 transitions. [2021-12-21 15:16:11,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 302 transitions, 2990 flow [2021-12-21 15:16:11,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 302 transitions, 2861 flow, removed 45 selfloop flow, removed 8 redundant places. [2021-12-21 15:16:11,385 INFO L242 Difference]: Finished difference. Result has 343 places, 267 transitions, 2261 flow [2021-12-21 15:16:11,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2261, PETRI_PLACES=343, PETRI_TRANSITIONS=267} [2021-12-21 15:16:11,386 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 186 predicate places. [2021-12-21 15:16:11,386 INFO L470 AbstractCegarLoop]: Abstraction has has 343 places, 267 transitions, 2261 flow [2021-12-21 15:16:11,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:11,386 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:11,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 15:16:11,386 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash 74022096, now seen corresponding path program 30 times [2021-12-21 15:16:11,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:11,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694372939] [2021-12-21 15:16:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:11,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:11,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694372939] [2021-12-21 15:16:11,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694372939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:11,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:11,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:11,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457059248] [2021-12-21 15:16:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:11,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:11,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:11,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:11,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 267 transitions, 2261 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:11,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:11,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:11,940 INFO L129 PetriNetUnfolder]: 297/1657 cut-off events. [2021-12-21 15:16:11,940 INFO L130 PetriNetUnfolder]: For 7430/7502 co-relation queries the response was YES. [2021-12-21 15:16:11,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6067 conditions, 1657 events. 297/1657 cut-off events. For 7430/7502 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12918 event pairs, 222 based on Foata normal form. 1/1595 useless extension candidates. Maximal degree in co-relation 5959. Up to 725 conditions per place. [2021-12-21 15:16:11,953 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 79 selfloop transitions, 51 changer transitions 31/310 dead transitions. [2021-12-21 15:16:11,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 310 transitions, 3190 flow [2021-12-21 15:16:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2528 transitions. [2021-12-21 15:16:11,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764670296430732 [2021-12-21 15:16:11,955 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2528 transitions. [2021-12-21 15:16:11,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2528 transitions. [2021-12-21 15:16:11,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:11,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2528 transitions. [2021-12-21 15:16:11,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.05263157894737) internal successors, (2528), 19 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,958 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:11,959 INFO L186 Difference]: Start difference. First operand has 343 places, 267 transitions, 2261 flow. Second operand 19 states and 2528 transitions. [2021-12-21 15:16:11,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 310 transitions, 3190 flow [2021-12-21 15:16:11,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 310 transitions, 3074 flow, removed 34 selfloop flow, removed 8 redundant places. [2021-12-21 15:16:11,999 INFO L242 Difference]: Finished difference. Result has 353 places, 275 transitions, 2478 flow [2021-12-21 15:16:12,000 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2478, PETRI_PLACES=353, PETRI_TRANSITIONS=275} [2021-12-21 15:16:12,000 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 196 predicate places. [2021-12-21 15:16:12,000 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 275 transitions, 2478 flow [2021-12-21 15:16:12,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:12,000 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:12,000 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:12,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 15:16:12,001 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:12,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1781172522, now seen corresponding path program 31 times [2021-12-21 15:16:12,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:12,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456378199] [2021-12-21 15:16:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:12,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:12,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456378199] [2021-12-21 15:16:12,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456378199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:12,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:12,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:12,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913424833] [2021-12-21 15:16:12,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:12,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:12,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:12,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:12,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:12,104 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:12,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 275 transitions, 2478 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:12,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:12,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:12,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:12,578 INFO L129 PetriNetUnfolder]: 294/1662 cut-off events. [2021-12-21 15:16:12,578 INFO L130 PetriNetUnfolder]: For 7631/7703 co-relation queries the response was YES. [2021-12-21 15:16:12,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6108 conditions, 1662 events. 294/1662 cut-off events. For 7631/7703 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12992 event pairs, 220 based on Foata normal form. 1/1600 useless extension candidates. Maximal degree in co-relation 5995. Up to 723 conditions per place. [2021-12-21 15:16:12,596 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 90 selfloop transitions, 43 changer transitions 32/314 dead transitions. [2021-12-21 15:16:12,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 314 transitions, 3373 flow [2021-12-21 15:16:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2659 transitions. [2021-12-21 15:16:12,598 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764080459770115 [2021-12-21 15:16:12,598 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2659 transitions. [2021-12-21 15:16:12,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2659 transitions. [2021-12-21 15:16:12,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:12,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2659 transitions. [2021-12-21 15:16:12,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.95) internal successors, (2659), 20 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:12,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:12,602 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:12,602 INFO L186 Difference]: Start difference. First operand has 353 places, 275 transitions, 2478 flow. Second operand 20 states and 2659 transitions. [2021-12-21 15:16:12,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 314 transitions, 3373 flow [2021-12-21 15:16:12,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 314 transitions, 3232 flow, removed 23 selfloop flow, removed 9 redundant places. [2021-12-21 15:16:12,650 INFO L242 Difference]: Finished difference. Result has 363 places, 279 transitions, 2576 flow [2021-12-21 15:16:12,651 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2576, PETRI_PLACES=363, PETRI_TRANSITIONS=279} [2021-12-21 15:16:12,651 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 206 predicate places. [2021-12-21 15:16:12,651 INFO L470 AbstractCegarLoop]: Abstraction has has 363 places, 279 transitions, 2576 flow [2021-12-21 15:16:12,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:12,651 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:12,652 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:12,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-21 15:16:12,652 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2047896920, now seen corresponding path program 32 times [2021-12-21 15:16:12,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709841675] [2021-12-21 15:16:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:12,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:12,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:12,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709841675] [2021-12-21 15:16:12,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709841675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:12,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:12,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:12,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532970163] [2021-12-21 15:16:12,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:12,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:12,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:12,747 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:12,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 279 transitions, 2576 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:12,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:12,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:12,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:13,203 INFO L129 PetriNetUnfolder]: 286/1651 cut-off events. [2021-12-21 15:16:13,203 INFO L130 PetriNetUnfolder]: For 7355/7427 co-relation queries the response was YES. [2021-12-21 15:16:13,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 1651 events. 286/1651 cut-off events. For 7355/7427 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12929 event pairs, 219 based on Foata normal form. 1/1590 useless extension candidates. Maximal degree in co-relation 5825. Up to 718 conditions per place. [2021-12-21 15:16:13,221 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 88 selfloop transitions, 20 changer transitions 47/304 dead transitions. [2021-12-21 15:16:13,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 304 transitions, 3122 flow [2021-12-21 15:16:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2530 transitions. [2021-12-21 15:16:13,222 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7652752571082879 [2021-12-21 15:16:13,222 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2530 transitions. [2021-12-21 15:16:13,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2530 transitions. [2021-12-21 15:16:13,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:13,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2530 transitions. [2021-12-21 15:16:13,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.1578947368421) internal successors, (2530), 19 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,226 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,226 INFO L186 Difference]: Start difference. First operand has 363 places, 279 transitions, 2576 flow. Second operand 19 states and 2530 transitions. [2021-12-21 15:16:13,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 304 transitions, 3122 flow [2021-12-21 15:16:13,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 304 transitions, 3009 flow, removed 33 selfloop flow, removed 7 redundant places. [2021-12-21 15:16:13,278 INFO L242 Difference]: Finished difference. Result has 369 places, 255 transitions, 2103 flow [2021-12-21 15:16:13,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2103, PETRI_PLACES=369, PETRI_TRANSITIONS=255} [2021-12-21 15:16:13,279 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 212 predicate places. [2021-12-21 15:16:13,279 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 255 transitions, 2103 flow [2021-12-21 15:16:13,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:13,280 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:13,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-21 15:16:13,280 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash 440470920, now seen corresponding path program 33 times [2021-12-21 15:16:13,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:13,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232102327] [2021-12-21 15:16:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:13,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:13,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:13,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232102327] [2021-12-21 15:16:13,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232102327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:13,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:13,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:13,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127091374] [2021-12-21 15:16:13,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:13,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:13,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:13,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:13,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:13,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:13,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 255 transitions, 2103 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:13,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:13,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:13,881 INFO L129 PetriNetUnfolder]: 282/1628 cut-off events. [2021-12-21 15:16:13,881 INFO L130 PetriNetUnfolder]: For 6620/6692 co-relation queries the response was YES. [2021-12-21 15:16:13,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5694 conditions, 1628 events. 282/1628 cut-off events. For 6620/6692 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12706 event pairs, 220 based on Foata normal form. 1/1566 useless extension candidates. Maximal degree in co-relation 5576. Up to 716 conditions per place. [2021-12-21 15:16:13,894 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 70 selfloop transitions, 28 changer transitions 41/288 dead transitions. [2021-12-21 15:16:13,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 288 transitions, 2775 flow [2021-12-21 15:16:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2915 transitions. [2021-12-21 15:16:13,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7614942528735632 [2021-12-21 15:16:13,896 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2915 transitions. [2021-12-21 15:16:13,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2915 transitions. [2021-12-21 15:16:13,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:13,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2915 transitions. [2021-12-21 15:16:13,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.5) internal successors, (2915), 22 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,900 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,900 INFO L186 Difference]: Start difference. First operand has 369 places, 255 transitions, 2103 flow. Second operand 22 states and 2915 transitions. [2021-12-21 15:16:13,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 288 transitions, 2775 flow [2021-12-21 15:16:13,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 288 transitions, 2571 flow, removed 27 selfloop flow, removed 24 redundant places. [2021-12-21 15:16:13,944 INFO L242 Difference]: Finished difference. Result has 347 places, 246 transitions, 1864 flow [2021-12-21 15:16:13,945 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1864, PETRI_PLACES=347, PETRI_TRANSITIONS=246} [2021-12-21 15:16:13,945 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 190 predicate places. [2021-12-21 15:16:13,945 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 246 transitions, 1864 flow [2021-12-21 15:16:13,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:13,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:13,945 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:13,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 15:16:13,946 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1192206660, now seen corresponding path program 34 times [2021-12-21 15:16:13,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:13,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274708781] [2021-12-21 15:16:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:13,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:14,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274708781] [2021-12-21 15:16:14,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274708781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:14,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:14,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:14,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47223482] [2021-12-21 15:16:14,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:14,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:14,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:14,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:14,029 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:14,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 246 transitions, 1864 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:14,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:14,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:14,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:14,484 INFO L129 PetriNetUnfolder]: 275/1593 cut-off events. [2021-12-21 15:16:14,484 INFO L130 PetriNetUnfolder]: For 5781/5853 co-relation queries the response was YES. [2021-12-21 15:16:14,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5351 conditions, 1593 events. 275/1593 cut-off events. For 5781/5853 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 12368 event pairs, 220 based on Foata normal form. 1/1531 useless extension candidates. Maximal degree in co-relation 5240. Up to 712 conditions per place. [2021-12-21 15:16:14,500 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 67 selfloop transitions, 14 changer transitions 44/274 dead transitions. [2021-12-21 15:16:14,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 274 transitions, 2409 flow [2021-12-21 15:16:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:16:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:16:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2785 transitions. [2021-12-21 15:16:14,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7621784345922277 [2021-12-21 15:16:14,502 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2785 transitions. [2021-12-21 15:16:14,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2785 transitions. [2021-12-21 15:16:14,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:14,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2785 transitions. [2021-12-21 15:16:14,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.61904761904762) internal successors, (2785), 21 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:14,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:14,506 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:14,506 INFO L186 Difference]: Start difference. First operand has 347 places, 246 transitions, 1864 flow. Second operand 21 states and 2785 transitions. [2021-12-21 15:16:14,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 274 transitions, 2409 flow [2021-12-21 15:16:14,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 274 transitions, 2230 flow, removed 33 selfloop flow, removed 25 redundant places. [2021-12-21 15:16:14,543 INFO L242 Difference]: Finished difference. Result has 330 places, 229 transitions, 1499 flow [2021-12-21 15:16:14,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1499, PETRI_PLACES=330, PETRI_TRANSITIONS=229} [2021-12-21 15:16:14,543 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 173 predicate places. [2021-12-21 15:16:14,543 INFO L470 AbstractCegarLoop]: Abstraction has has 330 places, 229 transitions, 1499 flow [2021-12-21 15:16:14,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:14,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:14,544 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:14,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 15:16:14,544 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -261161542, now seen corresponding path program 35 times [2021-12-21 15:16:14,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:14,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967750958] [2021-12-21 15:16:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:14,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:14,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:14,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967750958] [2021-12-21 15:16:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967750958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:14,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:14,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:14,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740357412] [2021-12-21 15:16:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:14,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:14,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:14,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:14,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 229 transitions, 1499 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:14,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:14,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:14,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:15,066 INFO L129 PetriNetUnfolder]: 263/1517 cut-off events. [2021-12-21 15:16:15,066 INFO L130 PetriNetUnfolder]: For 4839/4911 co-relation queries the response was YES. [2021-12-21 15:16:15,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 1517 events. 263/1517 cut-off events. For 4839/4911 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 11531 event pairs, 218 based on Foata normal form. 1/1457 useless extension candidates. Maximal degree in co-relation 4754. Up to 690 conditions per place. [2021-12-21 15:16:15,080 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 51 selfloop transitions, 2 changer transitions 51/249 dead transitions. [2021-12-21 15:16:15,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 249 transitions, 1864 flow [2021-12-21 15:16:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2645 transitions. [2021-12-21 15:16:15,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7600574712643678 [2021-12-21 15:16:15,083 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2645 transitions. [2021-12-21 15:16:15,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2645 transitions. [2021-12-21 15:16:15,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:15,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2645 transitions. [2021-12-21 15:16:15,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.25) internal successors, (2645), 20 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,088 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,088 INFO L186 Difference]: Start difference. First operand has 330 places, 229 transitions, 1499 flow. Second operand 20 states and 2645 transitions. [2021-12-21 15:16:15,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 249 transitions, 1864 flow [2021-12-21 15:16:15,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 249 transitions, 1754 flow, removed 23 selfloop flow, removed 23 redundant places. [2021-12-21 15:16:15,117 INFO L242 Difference]: Finished difference. Result has 306 places, 198 transitions, 1011 flow [2021-12-21 15:16:15,118 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1011, PETRI_PLACES=306, PETRI_TRANSITIONS=198} [2021-12-21 15:16:15,119 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 149 predicate places. [2021-12-21 15:16:15,119 INFO L470 AbstractCegarLoop]: Abstraction has has 306 places, 198 transitions, 1011 flow [2021-12-21 15:16:15,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,120 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:15,120 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:15,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 15:16:15,120 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1087007612, now seen corresponding path program 1 times [2021-12-21 15:16:15,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556723586] [2021-12-21 15:16:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:15,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:15,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:15,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556723586] [2021-12-21 15:16:15,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556723586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:15,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:15,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:15,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496886920] [2021-12-21 15:16:15,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:15,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:15,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:15,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:15,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 198 transitions, 1011 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:15,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:15,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:15,660 INFO L129 PetriNetUnfolder]: 327/1614 cut-off events. [2021-12-21 15:16:15,660 INFO L130 PetriNetUnfolder]: For 5252/5323 co-relation queries the response was YES. [2021-12-21 15:16:15,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5145 conditions, 1614 events. 327/1614 cut-off events. For 5252/5323 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 11978 event pairs, 181 based on Foata normal form. 2/1544 useless extension candidates. Maximal degree in co-relation 5057. Up to 597 conditions per place. [2021-12-21 15:16:15,679 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 80 selfloop transitions, 14 changer transitions 32/272 dead transitions. [2021-12-21 15:16:15,679 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 272 transitions, 1942 flow [2021-12-21 15:16:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2926 transitions. [2021-12-21 15:16:15,681 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764367816091954 [2021-12-21 15:16:15,681 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2926 transitions. [2021-12-21 15:16:15,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2926 transitions. [2021-12-21 15:16:15,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:15,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2926 transitions. [2021-12-21 15:16:15,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 133.0) internal successors, (2926), 22 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,686 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,686 INFO L186 Difference]: Start difference. First operand has 306 places, 198 transitions, 1011 flow. Second operand 22 states and 2926 transitions. [2021-12-21 15:16:15,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 272 transitions, 1942 flow [2021-12-21 15:16:15,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 272 transitions, 1870 flow, removed 24 selfloop flow, removed 27 redundant places. [2021-12-21 15:16:15,707 INFO L242 Difference]: Finished difference. Result has 278 places, 211 transitions, 1151 flow [2021-12-21 15:16:15,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1151, PETRI_PLACES=278, PETRI_TRANSITIONS=211} [2021-12-21 15:16:15,707 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 121 predicate places. [2021-12-21 15:16:15,708 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 211 transitions, 1151 flow [2021-12-21 15:16:15,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,708 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:15,708 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:15,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-21 15:16:15,708 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1783627810, now seen corresponding path program 2 times [2021-12-21 15:16:15,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:15,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806796254] [2021-12-21 15:16:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:15,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:15,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:15,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806796254] [2021-12-21 15:16:15,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806796254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:15,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:15,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:15,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150051071] [2021-12-21 15:16:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:15,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:15,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:15,788 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:15,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 211 transitions, 1151 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:15,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:15,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:15,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:16,260 INFO L129 PetriNetUnfolder]: 323/1608 cut-off events. [2021-12-21 15:16:16,260 INFO L130 PetriNetUnfolder]: For 11061/11126 co-relation queries the response was YES. [2021-12-21 15:16:16,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6298 conditions, 1608 events. 323/1608 cut-off events. For 11061/11126 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 11935 event pairs, 170 based on Foata normal form. 2/1547 useless extension candidates. Maximal degree in co-relation 6215. Up to 542 conditions per place. [2021-12-21 15:16:16,274 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 122 selfloop transitions, 12 changer transitions 46/326 dead transitions. [2021-12-21 15:16:16,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 326 transitions, 2691 flow [2021-12-21 15:16:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 15:16:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-21 15:16:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4111 transitions. [2021-12-21 15:16:16,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7621431219873934 [2021-12-21 15:16:16,277 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4111 transitions. [2021-12-21 15:16:16,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4111 transitions. [2021-12-21 15:16:16,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:16,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4111 transitions. [2021-12-21 15:16:16,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 132.61290322580646) internal successors, (4111), 31 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:16,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:16,282 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:16,282 INFO L186 Difference]: Start difference. First operand has 278 places, 211 transitions, 1151 flow. Second operand 31 states and 4111 transitions. [2021-12-21 15:16:16,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 326 transitions, 2691 flow [2021-12-21 15:16:16,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 326 transitions, 2253 flow, removed 219 selfloop flow, removed 14 redundant places. [2021-12-21 15:16:16,314 INFO L242 Difference]: Finished difference. Result has 307 places, 214 transitions, 1196 flow [2021-12-21 15:16:16,315 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1196, PETRI_PLACES=307, PETRI_TRANSITIONS=214} [2021-12-21 15:16:16,315 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 150 predicate places. [2021-12-21 15:16:16,315 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 214 transitions, 1196 flow [2021-12-21 15:16:16,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:16,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:16,315 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:16,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-21 15:16:16,316 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -758953314, now seen corresponding path program 3 times [2021-12-21 15:16:16,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:16,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583776537] [2021-12-21 15:16:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:16,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:16,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583776537] [2021-12-21 15:16:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583776537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:16,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:16,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:16,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146524928] [2021-12-21 15:16:16,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:16,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:16,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 214 transitions, 1196 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:16,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:16,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:16,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:16,962 INFO L129 PetriNetUnfolder]: 332/1706 cut-off events. [2021-12-21 15:16:16,962 INFO L130 PetriNetUnfolder]: For 10637/10702 co-relation queries the response was YES. [2021-12-21 15:16:16,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1706 events. 332/1706 cut-off events. For 10637/10702 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 13008 event pairs, 157 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 6423. Up to 540 conditions per place. [2021-12-21 15:16:16,979 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 148 selfloop transitions, 10 changer transitions 46/350 dead transitions. [2021-12-21 15:16:16,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 350 transitions, 3074 flow [2021-12-21 15:16:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 15:16:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-21 15:16:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3982 transitions. [2021-12-21 15:16:16,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7628352490421456 [2021-12-21 15:16:16,996 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3982 transitions. [2021-12-21 15:16:16,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3982 transitions. [2021-12-21 15:16:16,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:16,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3982 transitions. [2021-12-21 15:16:16,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 132.73333333333332) internal successors, (3982), 30 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,002 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,002 INFO L186 Difference]: Start difference. First operand has 307 places, 214 transitions, 1196 flow. Second operand 30 states and 3982 transitions. [2021-12-21 15:16:17,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 350 transitions, 3074 flow [2021-12-21 15:16:17,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 350 transitions, 2790 flow, removed 120 selfloop flow, removed 21 redundant places. [2021-12-21 15:16:17,043 INFO L242 Difference]: Finished difference. Result has 321 places, 218 transitions, 1296 flow [2021-12-21 15:16:17,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1296, PETRI_PLACES=321, PETRI_TRANSITIONS=218} [2021-12-21 15:16:17,045 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 164 predicate places. [2021-12-21 15:16:17,045 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 218 transitions, 1296 flow [2021-12-21 15:16:17,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:17,045 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:17,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-21 15:16:17,046 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1874127164, now seen corresponding path program 4 times [2021-12-21 15:16:17,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559389545] [2021-12-21 15:16:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:17,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:17,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559389545] [2021-12-21 15:16:17,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559389545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:17,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:17,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:17,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246372431] [2021-12-21 15:16:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:17,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:17,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:17,167 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:17,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 218 transitions, 1296 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:17,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:17,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:17,603 INFO L129 PetriNetUnfolder]: 327/1663 cut-off events. [2021-12-21 15:16:17,604 INFO L130 PetriNetUnfolder]: For 14540/14611 co-relation queries the response was YES. [2021-12-21 15:16:17,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7012 conditions, 1663 events. 327/1663 cut-off events. For 14540/14611 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12528 event pairs, 194 based on Foata normal form. 2/1598 useless extension candidates. Maximal degree in co-relation 6907. Up to 655 conditions per place. [2021-12-21 15:16:17,622 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 96 selfloop transitions, 22 changer transitions 23/287 dead transitions. [2021-12-21 15:16:17,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 287 transitions, 2562 flow [2021-12-21 15:16:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2529 transitions. [2021-12-21 15:16:17,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76497277676951 [2021-12-21 15:16:17,624 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2529 transitions. [2021-12-21 15:16:17,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2529 transitions. [2021-12-21 15:16:17,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:17,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2529 transitions. [2021-12-21 15:16:17,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.10526315789474) internal successors, (2529), 19 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,628 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,628 INFO L186 Difference]: Start difference. First operand has 321 places, 218 transitions, 1296 flow. Second operand 19 states and 2529 transitions. [2021-12-21 15:16:17,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 287 transitions, 2562 flow [2021-12-21 15:16:17,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 287 transitions, 2280 flow, removed 140 selfloop flow, removed 21 redundant places. [2021-12-21 15:16:17,679 INFO L242 Difference]: Finished difference. Result has 309 places, 232 transitions, 1515 flow [2021-12-21 15:16:17,679 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1515, PETRI_PLACES=309, PETRI_TRANSITIONS=232} [2021-12-21 15:16:17,679 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 152 predicate places. [2021-12-21 15:16:17,679 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 232 transitions, 1515 flow [2021-12-21 15:16:17,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,680 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:17,680 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:17,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-21 15:16:17,680 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1567922580, now seen corresponding path program 5 times [2021-12-21 15:16:17,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:17,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290187020] [2021-12-21 15:16:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:17,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:17,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:17,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290187020] [2021-12-21 15:16:17,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290187020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:17,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:17,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:17,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927392208] [2021-12-21 15:16:17,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:17,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:17,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:17,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:17,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 232 transitions, 1515 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:17,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:17,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:17,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:18,336 INFO L129 PetriNetUnfolder]: 363/1768 cut-off events. [2021-12-21 15:16:18,336 INFO L130 PetriNetUnfolder]: For 12156/12224 co-relation queries the response was YES. [2021-12-21 15:16:18,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 1768 events. 363/1768 cut-off events. For 12156/12224 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 13498 event pairs, 212 based on Foata normal form. 3/1705 useless extension candidates. Maximal degree in co-relation 7356. Up to 661 conditions per place. [2021-12-21 15:16:18,350 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 118 selfloop transitions, 17 changer transitions 40/321 dead transitions. [2021-12-21 15:16:18,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 321 transitions, 3124 flow [2021-12-21 15:16:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 15:16:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-21 15:16:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3580 transitions. [2021-12-21 15:16:18,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7620263942103023 [2021-12-21 15:16:18,352 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3580 transitions. [2021-12-21 15:16:18,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3580 transitions. [2021-12-21 15:16:18,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:18,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3580 transitions. [2021-12-21 15:16:18,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 132.59259259259258) internal successors, (3580), 27 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:18,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:18,357 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:18,357 INFO L186 Difference]: Start difference. First operand has 309 places, 232 transitions, 1515 flow. Second operand 27 states and 3580 transitions. [2021-12-21 15:16:18,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 321 transitions, 3124 flow [2021-12-21 15:16:18,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 321 transitions, 2915 flow, removed 83 selfloop flow, removed 8 redundant places. [2021-12-21 15:16:18,400 INFO L242 Difference]: Finished difference. Result has 341 places, 244 transitions, 1677 flow [2021-12-21 15:16:18,400 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1677, PETRI_PLACES=341, PETRI_TRANSITIONS=244} [2021-12-21 15:16:18,400 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 184 predicate places. [2021-12-21 15:16:18,401 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 244 transitions, 1677 flow [2021-12-21 15:16:18,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:18,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:18,401 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-21 15:16:18,427 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash -22442538, now seen corresponding path program 6 times [2021-12-21 15:16:18,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:18,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765132944] [2021-12-21 15:16:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:18,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:18,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765132944] [2021-12-21 15:16:18,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765132944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:18,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:18,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:18,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529654857] [2021-12-21 15:16:18,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:18,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:18,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:18,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:18,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 244 transitions, 1677 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:18,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:18,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:18,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:19,087 INFO L129 PetriNetUnfolder]: 370/1826 cut-off events. [2021-12-21 15:16:19,088 INFO L130 PetriNetUnfolder]: For 17586/17660 co-relation queries the response was YES. [2021-12-21 15:16:19,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 1826 events. 370/1826 cut-off events. For 17586/17660 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 14141 event pairs, 210 based on Foata normal form. 2/1763 useless extension candidates. Maximal degree in co-relation 8155. Up to 607 conditions per place. [2021-12-21 15:16:19,111 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 112 selfloop transitions, 25 changer transitions 40/323 dead transitions. [2021-12-21 15:16:19,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 323 transitions, 3430 flow [2021-12-21 15:16:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 15:16:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-21 15:16:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3449 transitions. [2021-12-21 15:16:19,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7623784261715296 [2021-12-21 15:16:19,113 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3449 transitions. [2021-12-21 15:16:19,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3449 transitions. [2021-12-21 15:16:19,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:19,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3449 transitions. [2021-12-21 15:16:19,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 132.65384615384616) internal successors, (3449), 26 states have internal predecessors, (3449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,118 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,118 INFO L186 Difference]: Start difference. First operand has 341 places, 244 transitions, 1677 flow. Second operand 26 states and 3449 transitions. [2021-12-21 15:16:19,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 323 transitions, 3430 flow [2021-12-21 15:16:19,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 323 transitions, 3056 flow, removed 187 selfloop flow, removed 16 redundant places. [2021-12-21 15:16:19,181 INFO L242 Difference]: Finished difference. Result has 354 places, 253 transitions, 1874 flow [2021-12-21 15:16:19,181 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1874, PETRI_PLACES=354, PETRI_TRANSITIONS=253} [2021-12-21 15:16:19,182 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 197 predicate places. [2021-12-21 15:16:19,182 INFO L470 AbstractCegarLoop]: Abstraction has has 354 places, 253 transitions, 1874 flow [2021-12-21 15:16:19,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:19,182 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:19,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-21 15:16:19,183 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash 320292718, now seen corresponding path program 7 times [2021-12-21 15:16:19,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:19,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800920646] [2021-12-21 15:16:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:19,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:19,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800920646] [2021-12-21 15:16:19,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800920646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:19,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:19,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:19,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686902810] [2021-12-21 15:16:19,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:19,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:19,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:19,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:19,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:19,291 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:19,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 253 transitions, 1874 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:19,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:19,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:19,810 INFO L129 PetriNetUnfolder]: 370/1821 cut-off events. [2021-12-21 15:16:19,810 INFO L130 PetriNetUnfolder]: For 18832/18930 co-relation queries the response was YES. [2021-12-21 15:16:19,826 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8434 conditions, 1821 events. 370/1821 cut-off events. For 18832/18930 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 14019 event pairs, 234 based on Foata normal form. 5/1751 useless extension candidates. Maximal degree in co-relation 8311. Up to 710 conditions per place. [2021-12-21 15:16:19,830 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 115 selfloop transitions, 35 changer transitions 36/332 dead transitions. [2021-12-21 15:16:19,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 332 transitions, 3619 flow [2021-12-21 15:16:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 15:16:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-21 15:16:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3312 transitions. [2021-12-21 15:16:19,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7613793103448275 [2021-12-21 15:16:19,832 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3312 transitions. [2021-12-21 15:16:19,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3312 transitions. [2021-12-21 15:16:19,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:19,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3312 transitions. [2021-12-21 15:16:19,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 132.48) internal successors, (3312), 25 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,837 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 174.0) internal successors, (4524), 26 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,837 INFO L186 Difference]: Start difference. First operand has 354 places, 253 transitions, 1874 flow. Second operand 25 states and 3312 transitions. [2021-12-21 15:16:19,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 332 transitions, 3619 flow [2021-12-21 15:16:19,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 332 transitions, 3360 flow, removed 120 selfloop flow, removed 18 redundant places. [2021-12-21 15:16:19,903 INFO L242 Difference]: Finished difference. Result has 362 places, 268 transitions, 2204 flow [2021-12-21 15:16:19,904 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2204, PETRI_PLACES=362, PETRI_TRANSITIONS=268} [2021-12-21 15:16:19,904 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 205 predicate places. [2021-12-21 15:16:19,904 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 268 transitions, 2204 flow [2021-12-21 15:16:19,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:19,904 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:19,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-21 15:16:19,905 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:19,905 INFO L85 PathProgramCache]: Analyzing trace with hash -451418944, now seen corresponding path program 8 times [2021-12-21 15:16:19,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:19,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927266204] [2021-12-21 15:16:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:19,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:19,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:19,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927266204] [2021-12-21 15:16:19,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927266204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:19,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:19,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:19,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156231510] [2021-12-21 15:16:19,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:19,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:19,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:19,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:19,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 268 transitions, 2204 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:19,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:19,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:19,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:20,607 INFO L129 PetriNetUnfolder]: 363/1773 cut-off events. [2021-12-21 15:16:20,607 INFO L130 PetriNetUnfolder]: For 16945/17023 co-relation queries the response was YES. [2021-12-21 15:16:20,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8269 conditions, 1773 events. 363/1773 cut-off events. For 16945/17023 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 13673 event pairs, 209 based on Foata normal form. 8/1715 useless extension candidates. Maximal degree in co-relation 8143. Up to 680 conditions per place. [2021-12-21 15:16:20,626 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 127 selfloop transitions, 36 changer transitions 47/356 dead transitions. [2021-12-21 15:16:20,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 356 transitions, 3969 flow [2021-12-21 15:16:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 15:16:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-21 15:16:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3707 transitions. [2021-12-21 15:16:20,628 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7608784893267652 [2021-12-21 15:16:20,628 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3707 transitions. [2021-12-21 15:16:20,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3707 transitions. [2021-12-21 15:16:20,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:20,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3707 transitions. [2021-12-21 15:16:20,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 132.39285714285714) internal successors, (3707), 28 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:20,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:20,633 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:20,633 INFO L186 Difference]: Start difference. First operand has 362 places, 268 transitions, 2204 flow. Second operand 28 states and 3707 transitions. [2021-12-21 15:16:20,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 356 transitions, 3969 flow [2021-12-21 15:16:20,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 356 transitions, 3540 flow, removed 190 selfloop flow, removed 16 redundant places. [2021-12-21 15:16:20,719 INFO L242 Difference]: Finished difference. Result has 378 places, 268 transitions, 2153 flow [2021-12-21 15:16:20,720 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2153, PETRI_PLACES=378, PETRI_TRANSITIONS=268} [2021-12-21 15:16:20,720 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 221 predicate places. [2021-12-21 15:16:20,720 INFO L470 AbstractCegarLoop]: Abstraction has has 378 places, 268 transitions, 2153 flow [2021-12-21 15:16:20,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:20,720 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:20,720 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:20,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-21 15:16:20,720 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash 255408086, now seen corresponding path program 9 times [2021-12-21 15:16:20,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018287968] [2021-12-21 15:16:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:20,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:20,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:20,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018287968] [2021-12-21 15:16:20,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018287968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:20,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:20,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:20,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251864616] [2021-12-21 15:16:20,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:20,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:20,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:20,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:20,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 268 transitions, 2153 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:20,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:20,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:20,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:21,243 INFO L129 PetriNetUnfolder]: 363/1782 cut-off events. [2021-12-21 15:16:21,243 INFO L130 PetriNetUnfolder]: For 15233/15335 co-relation queries the response was YES. [2021-12-21 15:16:21,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7997 conditions, 1782 events. 363/1782 cut-off events. For 15233/15335 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13708 event pairs, 214 based on Foata normal form. 10/1721 useless extension candidates. Maximal degree in co-relation 7865. Up to 704 conditions per place. [2021-12-21 15:16:21,266 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 116 selfloop transitions, 37 changer transitions 31/330 dead transitions. [2021-12-21 15:16:21,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 330 transitions, 3388 flow [2021-12-21 15:16:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2657 transitions. [2021-12-21 15:16:21,267 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635057471264368 [2021-12-21 15:16:21,267 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2657 transitions. [2021-12-21 15:16:21,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2657 transitions. [2021-12-21 15:16:21,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:21,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2657 transitions. [2021-12-21 15:16:21,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.85) internal successors, (2657), 20 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,271 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,271 INFO L186 Difference]: Start difference. First operand has 378 places, 268 transitions, 2153 flow. Second operand 20 states and 2657 transitions. [2021-12-21 15:16:21,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 330 transitions, 3388 flow [2021-12-21 15:16:21,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 330 transitions, 3195 flow, removed 66 selfloop flow, removed 21 redundant places. [2021-12-21 15:16:21,341 INFO L242 Difference]: Finished difference. Result has 365 places, 268 transitions, 2150 flow [2021-12-21 15:16:21,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2150, PETRI_PLACES=365, PETRI_TRANSITIONS=268} [2021-12-21 15:16:21,342 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 208 predicate places. [2021-12-21 15:16:21,342 INFO L470 AbstractCegarLoop]: Abstraction has has 365 places, 268 transitions, 2150 flow [2021-12-21 15:16:21,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:21,342 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:21,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-21 15:16:21,342 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash -340988818, now seen corresponding path program 10 times [2021-12-21 15:16:21,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:21,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457116704] [2021-12-21 15:16:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:21,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:21,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:21,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457116704] [2021-12-21 15:16:21,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457116704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:21,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:21,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:21,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957917626] [2021-12-21 15:16:21,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:21,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:21,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:21,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:21,429 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:21,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 268 transitions, 2150 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:21,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:21,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:21,943 INFO L129 PetriNetUnfolder]: 339/1696 cut-off events. [2021-12-21 15:16:21,943 INFO L130 PetriNetUnfolder]: For 13443/13523 co-relation queries the response was YES. [2021-12-21 15:16:21,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7507 conditions, 1696 events. 339/1696 cut-off events. For 13443/13523 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12870 event pairs, 201 based on Foata normal form. 8/1640 useless extension candidates. Maximal degree in co-relation 7385. Up to 677 conditions per place. [2021-12-21 15:16:21,963 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 112 selfloop transitions, 20 changer transitions 44/322 dead transitions. [2021-12-21 15:16:21,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 322 transitions, 3188 flow [2021-12-21 15:16:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:16:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:16:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3172 transitions. [2021-12-21 15:16:21,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7595785440613027 [2021-12-21 15:16:21,966 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3172 transitions. [2021-12-21 15:16:21,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3172 transitions. [2021-12-21 15:16:21,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:21,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3172 transitions. [2021-12-21 15:16:21,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.16666666666666) internal successors, (3172), 24 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,971 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:21,971 INFO L186 Difference]: Start difference. First operand has 365 places, 268 transitions, 2150 flow. Second operand 24 states and 3172 transitions. [2021-12-21 15:16:21,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 322 transitions, 3188 flow [2021-12-21 15:16:22,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 322 transitions, 3064 flow, removed 21 selfloop flow, removed 14 redundant places. [2021-12-21 15:16:22,037 INFO L242 Difference]: Finished difference. Result has 372 places, 247 transitions, 1816 flow [2021-12-21 15:16:22,037 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1816, PETRI_PLACES=372, PETRI_TRANSITIONS=247} [2021-12-21 15:16:22,037 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 215 predicate places. [2021-12-21 15:16:22,037 INFO L470 AbstractCegarLoop]: Abstraction has has 372 places, 247 transitions, 1816 flow [2021-12-21 15:16:22,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:22,038 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:22,038 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:22,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-21 15:16:22,038 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1804455082, now seen corresponding path program 11 times [2021-12-21 15:16:22,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:22,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121469754] [2021-12-21 15:16:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:22,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:22,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121469754] [2021-12-21 15:16:22,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121469754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:22,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:22,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:22,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374170516] [2021-12-21 15:16:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:22,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:22,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:22,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:22,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 247 transitions, 1816 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:22,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:22,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:22,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:22,652 INFO L129 PetriNetUnfolder]: 338/1684 cut-off events. [2021-12-21 15:16:22,652 INFO L130 PetriNetUnfolder]: For 13925/14001 co-relation queries the response was YES. [2021-12-21 15:16:22,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7538 conditions, 1684 events. 338/1684 cut-off events. For 13925/14001 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12728 event pairs, 210 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 7413. Up to 677 conditions per place. [2021-12-21 15:16:22,672 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 100 selfloop transitions, 30 changer transitions 27/303 dead transitions. [2021-12-21 15:16:22,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 303 transitions, 3027 flow [2021-12-21 15:16:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2919 transitions. [2021-12-21 15:16:22,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.762539184952978 [2021-12-21 15:16:22,674 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2919 transitions. [2021-12-21 15:16:22,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2919 transitions. [2021-12-21 15:16:22,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:22,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2919 transitions. [2021-12-21 15:16:22,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.6818181818182) internal successors, (2919), 22 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:22,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:22,678 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:22,678 INFO L186 Difference]: Start difference. First operand has 372 places, 247 transitions, 1816 flow. Second operand 22 states and 2919 transitions. [2021-12-21 15:16:22,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 303 transitions, 3027 flow [2021-12-21 15:16:22,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 303 transitions, 2791 flow, removed 52 selfloop flow, removed 23 redundant places. [2021-12-21 15:16:22,742 INFO L242 Difference]: Finished difference. Result has 349 places, 259 transitions, 2024 flow [2021-12-21 15:16:22,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2024, PETRI_PLACES=349, PETRI_TRANSITIONS=259} [2021-12-21 15:16:22,742 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 192 predicate places. [2021-12-21 15:16:22,742 INFO L470 AbstractCegarLoop]: Abstraction has has 349 places, 259 transitions, 2024 flow [2021-12-21 15:16:22,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:22,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:22,743 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:22,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-21 15:16:22,743 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:22,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1740779910, now seen corresponding path program 12 times [2021-12-21 15:16:22,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:22,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687547520] [2021-12-21 15:16:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:22,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:22,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:22,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687547520] [2021-12-21 15:16:22,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687547520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:22,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:22,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:22,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88754438] [2021-12-21 15:16:22,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:22,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:22,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:22,828 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:22,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 259 transitions, 2024 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:22,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:22,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:22,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:23,336 INFO L129 PetriNetUnfolder]: 351/1751 cut-off events. [2021-12-21 15:16:23,336 INFO L130 PetriNetUnfolder]: For 13028/13117 co-relation queries the response was YES. [2021-12-21 15:16:23,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 1751 events. 351/1751 cut-off events. For 13028/13117 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 13319 event pairs, 231 based on Foata normal form. 4/1682 useless extension candidates. Maximal degree in co-relation 7432. Up to 679 conditions per place. [2021-12-21 15:16:23,358 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 106 selfloop transitions, 38 changer transitions 27/317 dead transitions. [2021-12-21 15:16:23,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 317 transitions, 3266 flow [2021-12-21 15:16:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2662 transitions. [2021-12-21 15:16:23,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7649425287356322 [2021-12-21 15:16:23,360 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2662 transitions. [2021-12-21 15:16:23,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2662 transitions. [2021-12-21 15:16:23,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:23,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2662 transitions. [2021-12-21 15:16:23,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.1) internal successors, (2662), 20 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:23,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:23,364 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:23,364 INFO L186 Difference]: Start difference. First operand has 349 places, 259 transitions, 2024 flow. Second operand 20 states and 2662 transitions. [2021-12-21 15:16:23,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 317 transitions, 3266 flow [2021-12-21 15:16:23,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 317 transitions, 3066 flow, removed 92 selfloop flow, removed 5 redundant places. [2021-12-21 15:16:23,431 INFO L242 Difference]: Finished difference. Result has 365 places, 271 transitions, 2241 flow [2021-12-21 15:16:23,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2241, PETRI_PLACES=365, PETRI_TRANSITIONS=271} [2021-12-21 15:16:23,432 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 208 predicate places. [2021-12-21 15:16:23,432 INFO L470 AbstractCegarLoop]: Abstraction has has 365 places, 271 transitions, 2241 flow [2021-12-21 15:16:23,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:23,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:23,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:23,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-21 15:16:23,433 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash -687421056, now seen corresponding path program 13 times [2021-12-21 15:16:23,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:23,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542649742] [2021-12-21 15:16:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:23,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:23,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:23,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542649742] [2021-12-21 15:16:23,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542649742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:23,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:23,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:23,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389580215] [2021-12-21 15:16:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:23,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:23,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:23,522 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:23,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 271 transitions, 2241 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:23,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:23,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:23,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:24,040 INFO L129 PetriNetUnfolder]: 346/1747 cut-off events. [2021-12-21 15:16:24,041 INFO L130 PetriNetUnfolder]: For 13255/13344 co-relation queries the response was YES. [2021-12-21 15:16:24,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7552 conditions, 1747 events. 346/1747 cut-off events. For 13255/13344 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 13300 event pairs, 231 based on Foata normal form. 4/1678 useless extension candidates. Maximal degree in co-relation 7426. Up to 679 conditions per place. [2021-12-21 15:16:24,062 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 110 selfloop transitions, 37 changer transitions 29/322 dead transitions. [2021-12-21 15:16:24,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 322 transitions, 3409 flow [2021-12-21 15:16:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:16:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:16:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2792 transitions. [2021-12-21 15:16:24,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7640941434044882 [2021-12-21 15:16:24,064 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2792 transitions. [2021-12-21 15:16:24,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2792 transitions. [2021-12-21 15:16:24,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:24,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2792 transitions. [2021-12-21 15:16:24,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.95238095238096) internal successors, (2792), 21 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,068 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,068 INFO L186 Difference]: Start difference. First operand has 365 places, 271 transitions, 2241 flow. Second operand 21 states and 2792 transitions. [2021-12-21 15:16:24,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 322 transitions, 3409 flow [2021-12-21 15:16:24,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 322 transitions, 3287 flow, removed 37 selfloop flow, removed 8 redundant places. [2021-12-21 15:16:24,145 INFO L242 Difference]: Finished difference. Result has 380 places, 278 transitions, 2421 flow [2021-12-21 15:16:24,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2421, PETRI_PLACES=380, PETRI_TRANSITIONS=278} [2021-12-21 15:16:24,146 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 223 predicate places. [2021-12-21 15:16:24,146 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 278 transitions, 2421 flow [2021-12-21 15:16:24,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,146 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:24,146 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:24,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-21 15:16:24,147 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -926526690, now seen corresponding path program 14 times [2021-12-21 15:16:24,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:24,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461207922] [2021-12-21 15:16:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:24,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:24,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461207922] [2021-12-21 15:16:24,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461207922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:24,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:24,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:24,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418203257] [2021-12-21 15:16:24,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:24,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:24,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:24,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:24,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 278 transitions, 2421 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:24,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:24,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:24,781 INFO L129 PetriNetUnfolder]: 351/1758 cut-off events. [2021-12-21 15:16:24,782 INFO L130 PetriNetUnfolder]: For 13963/14035 co-relation queries the response was YES. [2021-12-21 15:16:24,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 1758 events. 351/1758 cut-off events. For 13963/14035 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13462 event pairs, 211 based on Foata normal form. 4/1695 useless extension candidates. Maximal degree in co-relation 7688. Up to 680 conditions per place. [2021-12-21 15:16:24,802 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 118 selfloop transitions, 37 changer transitions 42/343 dead transitions. [2021-12-21 15:16:24,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 343 transitions, 3828 flow [2021-12-21 15:16:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 15:16:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-21 15:16:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3056 transitions. [2021-12-21 15:16:24,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7636181909045477 [2021-12-21 15:16:24,803 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3056 transitions. [2021-12-21 15:16:24,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3056 transitions. [2021-12-21 15:16:24,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:24,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3056 transitions. [2021-12-21 15:16:24,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.8695652173913) internal successors, (3056), 23 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,808 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,808 INFO L186 Difference]: Start difference. First operand has 380 places, 278 transitions, 2421 flow. Second operand 23 states and 3056 transitions. [2021-12-21 15:16:24,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 343 transitions, 3828 flow [2021-12-21 15:16:24,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 343 transitions, 3632 flow, removed 71 selfloop flow, removed 7 redundant places. [2021-12-21 15:16:24,884 INFO L242 Difference]: Finished difference. Result has 399 places, 283 transitions, 2547 flow [2021-12-21 15:16:24,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2547, PETRI_PLACES=399, PETRI_TRANSITIONS=283} [2021-12-21 15:16:24,885 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 242 predicate places. [2021-12-21 15:16:24,885 INFO L470 AbstractCegarLoop]: Abstraction has has 399 places, 283 transitions, 2547 flow [2021-12-21 15:16:24,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,885 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:24,885 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:24,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-21 15:16:24,885 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1230332018, now seen corresponding path program 15 times [2021-12-21 15:16:24,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483483120] [2021-12-21 15:16:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:24,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:24,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:24,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483483120] [2021-12-21 15:16:24,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483483120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:24,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:24,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:24,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226841357] [2021-12-21 15:16:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:24,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:24,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:24,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:24,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 283 transitions, 2547 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:24,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:24,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:24,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:25,541 INFO L129 PetriNetUnfolder]: 346/1738 cut-off events. [2021-12-21 15:16:25,541 INFO L130 PetriNetUnfolder]: For 14838/14910 co-relation queries the response was YES. [2021-12-21 15:16:25,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7828 conditions, 1738 events. 346/1738 cut-off events. For 14838/14910 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 13293 event pairs, 211 based on Foata normal form. 4/1675 useless extension candidates. Maximal degree in co-relation 7688. Up to 675 conditions per place. [2021-12-21 15:16:25,568 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 115 selfloop transitions, 39 changer transitions 40/340 dead transitions. [2021-12-21 15:16:25,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 340 transitions, 3770 flow [2021-12-21 15:16:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:16:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:16:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3187 transitions. [2021-12-21 15:16:25,570 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7631704980842912 [2021-12-21 15:16:25,575 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3187 transitions. [2021-12-21 15:16:25,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3187 transitions. [2021-12-21 15:16:25,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:25,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3187 transitions. [2021-12-21 15:16:25,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.79166666666666) internal successors, (3187), 24 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:25,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:25,580 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:25,580 INFO L186 Difference]: Start difference. First operand has 399 places, 283 transitions, 2547 flow. Second operand 24 states and 3187 transitions. [2021-12-21 15:16:25,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 340 transitions, 3770 flow [2021-12-21 15:16:25,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 340 transitions, 3568 flow, removed 53 selfloop flow, removed 17 redundant places. [2021-12-21 15:16:25,670 INFO L242 Difference]: Finished difference. Result has 404 places, 282 transitions, 2533 flow [2021-12-21 15:16:25,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2533, PETRI_PLACES=404, PETRI_TRANSITIONS=282} [2021-12-21 15:16:25,671 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 247 predicate places. [2021-12-21 15:16:25,671 INFO L470 AbstractCegarLoop]: Abstraction has has 404 places, 282 transitions, 2533 flow [2021-12-21 15:16:25,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:25,671 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:25,671 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:25,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-21 15:16:25,671 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash -256361978, now seen corresponding path program 16 times [2021-12-21 15:16:25,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766997766] [2021-12-21 15:16:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:25,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:25,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766997766] [2021-12-21 15:16:25,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766997766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:25,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:25,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:25,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336651762] [2021-12-21 15:16:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:25,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:25,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:25,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:25,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 282 transitions, 2533 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:25,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:25,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:25,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:26,332 INFO L129 PetriNetUnfolder]: 337/1697 cut-off events. [2021-12-21 15:16:26,332 INFO L130 PetriNetUnfolder]: For 14048/14120 co-relation queries the response was YES. [2021-12-21 15:16:26,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7574 conditions, 1697 events. 337/1697 cut-off events. For 14048/14120 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12902 event pairs, 214 based on Foata normal form. 4/1633 useless extension candidates. Maximal degree in co-relation 7434. Up to 687 conditions per place. [2021-12-21 15:16:26,354 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 110 selfloop transitions, 28 changer transitions 34/318 dead transitions. [2021-12-21 15:16:26,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 318 transitions, 3345 flow [2021-12-21 15:16:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2659 transitions. [2021-12-21 15:16:26,356 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764080459770115 [2021-12-21 15:16:26,356 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2659 transitions. [2021-12-21 15:16:26,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2659 transitions. [2021-12-21 15:16:26,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:26,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2659 transitions. [2021-12-21 15:16:26,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.95) internal successors, (2659), 20 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:26,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:26,360 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:26,360 INFO L186 Difference]: Start difference. First operand has 404 places, 282 transitions, 2533 flow. Second operand 20 states and 2659 transitions. [2021-12-21 15:16:26,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 318 transitions, 3345 flow [2021-12-21 15:16:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 318 transitions, 3168 flow, removed 39 selfloop flow, removed 19 redundant places. [2021-12-21 15:16:26,445 INFO L242 Difference]: Finished difference. Result has 397 places, 271 transitions, 2268 flow [2021-12-21 15:16:26,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2268, PETRI_PLACES=397, PETRI_TRANSITIONS=271} [2021-12-21 15:16:26,445 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 240 predicate places. [2021-12-21 15:16:26,445 INFO L470 AbstractCegarLoop]: Abstraction has has 397 places, 271 transitions, 2268 flow [2021-12-21 15:16:26,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:26,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:26,446 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:26,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-21 15:16:26,446 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1480476274, now seen corresponding path program 17 times [2021-12-21 15:16:26,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218388815] [2021-12-21 15:16:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:26,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:26,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:26,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218388815] [2021-12-21 15:16:26,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218388815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:26,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:26,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:26,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573325321] [2021-12-21 15:16:26,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:26,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:26,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:26,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:26,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:26,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 271 transitions, 2268 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:26,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:26,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:26,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:27,005 INFO L129 PetriNetUnfolder]: 330/1701 cut-off events. [2021-12-21 15:16:27,005 INFO L130 PetriNetUnfolder]: For 13073/13156 co-relation queries the response was YES. [2021-12-21 15:16:27,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7208 conditions, 1701 events. 330/1701 cut-off events. For 13073/13156 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12938 event pairs, 226 based on Foata normal form. 4/1634 useless extension candidates. Maximal degree in co-relation 7074. Up to 674 conditions per place. [2021-12-21 15:16:27,025 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 100 selfloop transitions, 20 changer transitions 36/302 dead transitions. [2021-12-21 15:16:27,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 302 transitions, 2948 flow [2021-12-21 15:16:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2527 transitions. [2021-12-21 15:16:27,026 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764367816091954 [2021-12-21 15:16:27,026 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2527 transitions. [2021-12-21 15:16:27,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2527 transitions. [2021-12-21 15:16:27,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:27,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2527 transitions. [2021-12-21 15:16:27,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.0) internal successors, (2527), 19 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,030 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,030 INFO L186 Difference]: Start difference. First operand has 397 places, 271 transitions, 2268 flow. Second operand 19 states and 2527 transitions. [2021-12-21 15:16:27,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 302 transitions, 2948 flow [2021-12-21 15:16:27,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 302 transitions, 2783 flow, removed 25 selfloop flow, removed 23 redundant places. [2021-12-21 15:16:27,096 INFO L242 Difference]: Finished difference. Result has 379 places, 253 transitions, 1898 flow [2021-12-21 15:16:27,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1898, PETRI_PLACES=379, PETRI_TRANSITIONS=253} [2021-12-21 15:16:27,096 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 222 predicate places. [2021-12-21 15:16:27,097 INFO L470 AbstractCegarLoop]: Abstraction has has 379 places, 253 transitions, 1898 flow [2021-12-21 15:16:27,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:27,097 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:27,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-21 15:16:27,097 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1311043862, now seen corresponding path program 18 times [2021-12-21 15:16:27,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:27,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209883476] [2021-12-21 15:16:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:27,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:27,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:27,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209883476] [2021-12-21 15:16:27,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209883476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:27,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:27,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:27,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231977597] [2021-12-21 15:16:27,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:27,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:27,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:27,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:27,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 253 transitions, 1898 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:27,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:27,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:27,636 INFO L129 PetriNetUnfolder]: 307/1600 cut-off events. [2021-12-21 15:16:27,637 INFO L130 PetriNetUnfolder]: For 11653/11725 co-relation queries the response was YES. [2021-12-21 15:16:27,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6679 conditions, 1600 events. 307/1600 cut-off events. For 11653/11725 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 11990 event pairs, 204 based on Foata normal form. 4/1539 useless extension candidates. Maximal degree in co-relation 6554. Up to 651 conditions per place. [2021-12-21 15:16:27,655 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 89 selfloop transitions, 6 changer transitions 37/278 dead transitions. [2021-12-21 15:16:27,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 278 transitions, 2433 flow [2021-12-21 15:16:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2644 transitions. [2021-12-21 15:16:27,657 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7597701149425288 [2021-12-21 15:16:27,657 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2644 transitions. [2021-12-21 15:16:27,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2644 transitions. [2021-12-21 15:16:27,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:27,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2644 transitions. [2021-12-21 15:16:27,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.2) internal successors, (2644), 20 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,661 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,661 INFO L186 Difference]: Start difference. First operand has 379 places, 253 transitions, 1898 flow. Second operand 20 states and 2644 transitions. [2021-12-21 15:16:27,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 278 transitions, 2433 flow [2021-12-21 15:16:27,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 278 transitions, 2302 flow, removed 19 selfloop flow, removed 24 redundant places. [2021-12-21 15:16:27,720 INFO L242 Difference]: Finished difference. Result has 357 places, 228 transitions, 1466 flow [2021-12-21 15:16:27,720 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1466, PETRI_PLACES=357, PETRI_TRANSITIONS=228} [2021-12-21 15:16:27,720 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 200 predicate places. [2021-12-21 15:16:27,720 INFO L470 AbstractCegarLoop]: Abstraction has has 357 places, 228 transitions, 1466 flow [2021-12-21 15:16:27,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,721 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:27,721 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:27,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-21 15:16:27,721 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 692010612, now seen corresponding path program 19 times [2021-12-21 15:16:27,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615661580] [2021-12-21 15:16:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:27,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:27,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:27,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615661580] [2021-12-21 15:16:27,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615661580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:27,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:27,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:27,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116147857] [2021-12-21 15:16:27,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:27,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:27,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:27,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:27,809 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:27,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 228 transitions, 1466 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:27,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:27,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:27,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:28,397 INFO L129 PetriNetUnfolder]: 321/1637 cut-off events. [2021-12-21 15:16:28,397 INFO L130 PetriNetUnfolder]: For 11799/11867 co-relation queries the response was YES. [2021-12-21 15:16:28,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1637 events. 321/1637 cut-off events. For 11799/11867 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12269 event pairs, 185 based on Foata normal form. 2/1577 useless extension candidates. Maximal degree in co-relation 6748. Up to 596 conditions per place. [2021-12-21 15:16:28,415 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 107 selfloop transitions, 30 changer transitions 38/321 dead transitions. [2021-12-21 15:16:28,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 321 transitions, 3122 flow [2021-12-21 15:16:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 15:16:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-21 15:16:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3703 transitions. [2021-12-21 15:16:28,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7600574712643678 [2021-12-21 15:16:28,418 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3703 transitions. [2021-12-21 15:16:28,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3703 transitions. [2021-12-21 15:16:28,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:28,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3703 transitions. [2021-12-21 15:16:28,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 132.25) internal successors, (3703), 28 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:28,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:28,423 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:28,423 INFO L186 Difference]: Start difference. First operand has 357 places, 228 transitions, 1466 flow. Second operand 28 states and 3703 transitions. [2021-12-21 15:16:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 321 transitions, 3122 flow [2021-12-21 15:16:28,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 321 transitions, 2944 flow, removed 38 selfloop flow, removed 20 redundant places. [2021-12-21 15:16:28,468 INFO L242 Difference]: Finished difference. Result has 346 places, 243 transitions, 1756 flow [2021-12-21 15:16:28,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1756, PETRI_PLACES=346, PETRI_TRANSITIONS=243} [2021-12-21 15:16:28,469 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 189 predicate places. [2021-12-21 15:16:28,469 INFO L470 AbstractCegarLoop]: Abstraction has has 346 places, 243 transitions, 1756 flow [2021-12-21 15:16:28,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:28,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:28,469 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:28,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-21 15:16:28,470 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash 420148042, now seen corresponding path program 20 times [2021-12-21 15:16:28,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:28,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038953598] [2021-12-21 15:16:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:28,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:28,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:28,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038953598] [2021-12-21 15:16:28,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038953598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:28,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:28,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:28,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565456280] [2021-12-21 15:16:28,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:28,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:28,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:28,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:28,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 243 transitions, 1756 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:28,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:28,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:28,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:29,102 INFO L129 PetriNetUnfolder]: 322/1624 cut-off events. [2021-12-21 15:16:29,103 INFO L130 PetriNetUnfolder]: For 11125/11193 co-relation queries the response was YES. [2021-12-21 15:16:29,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6954 conditions, 1624 events. 322/1624 cut-off events. For 11125/11193 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12201 event pairs, 192 based on Foata normal form. 2/1557 useless extension candidates. Maximal degree in co-relation 6833. Up to 603 conditions per place. [2021-12-21 15:16:29,122 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 100 selfloop transitions, 34 changer transitions 35/315 dead transitions. [2021-12-21 15:16:29,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 315 transitions, 3237 flow [2021-12-21 15:16:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 15:16:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-21 15:16:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3446 transitions. [2021-12-21 15:16:29,124 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7617152961980548 [2021-12-21 15:16:29,124 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3446 transitions. [2021-12-21 15:16:29,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3446 transitions. [2021-12-21 15:16:29,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:29,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3446 transitions. [2021-12-21 15:16:29,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 132.53846153846155) internal successors, (3446), 26 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,129 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,129 INFO L186 Difference]: Start difference. First operand has 346 places, 243 transitions, 1756 flow. Second operand 26 states and 3446 transitions. [2021-12-21 15:16:29,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 315 transitions, 3237 flow [2021-12-21 15:16:29,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 315 transitions, 3052 flow, removed 73 selfloop flow, removed 15 redundant places. [2021-12-21 15:16:29,182 INFO L242 Difference]: Finished difference. Result has 359 places, 257 transitions, 2074 flow [2021-12-21 15:16:29,183 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2074, PETRI_PLACES=359, PETRI_TRANSITIONS=257} [2021-12-21 15:16:29,183 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 202 predicate places. [2021-12-21 15:16:29,183 INFO L470 AbstractCegarLoop]: Abstraction has has 359 places, 257 transitions, 2074 flow [2021-12-21 15:16:29,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:29,184 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:29,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-21 15:16:29,184 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:29,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1942395372, now seen corresponding path program 21 times [2021-12-21 15:16:29,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058352427] [2021-12-21 15:16:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:29,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:29,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:29,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058352427] [2021-12-21 15:16:29,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058352427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:29,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:29,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:29,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628231602] [2021-12-21 15:16:29,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:29,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:29,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:29,281 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:29,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 257 transitions, 2074 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:29,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:29,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:29,806 INFO L129 PetriNetUnfolder]: 318/1627 cut-off events. [2021-12-21 15:16:29,807 INFO L130 PetriNetUnfolder]: For 12778/12846 co-relation queries the response was YES. [2021-12-21 15:16:29,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7160 conditions, 1627 events. 318/1627 cut-off events. For 12778/12846 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12249 event pairs, 190 based on Foata normal form. 2/1562 useless extension candidates. Maximal degree in co-relation 7032. Up to 601 conditions per place. [2021-12-21 15:16:29,826 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 104 selfloop transitions, 36 changer transitions 39/325 dead transitions. [2021-12-21 15:16:29,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 325 transitions, 3501 flow [2021-12-21 15:16:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 15:16:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-21 15:16:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3575 transitions. [2021-12-21 15:16:29,827 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7609621115368241 [2021-12-21 15:16:29,827 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3575 transitions. [2021-12-21 15:16:29,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3575 transitions. [2021-12-21 15:16:29,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:29,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3575 transitions. [2021-12-21 15:16:29,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 132.40740740740742) internal successors, (3575), 27 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,832 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,832 INFO L186 Difference]: Start difference. First operand has 359 places, 257 transitions, 2074 flow. Second operand 27 states and 3575 transitions. [2021-12-21 15:16:29,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 325 transitions, 3501 flow [2021-12-21 15:16:29,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 325 transitions, 3245 flow, removed 108 selfloop flow, removed 16 redundant places. [2021-12-21 15:16:29,897 INFO L242 Difference]: Finished difference. Result has 372 places, 260 transitions, 2142 flow [2021-12-21 15:16:29,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2142, PETRI_PLACES=372, PETRI_TRANSITIONS=260} [2021-12-21 15:16:29,897 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 215 predicate places. [2021-12-21 15:16:29,897 INFO L470 AbstractCegarLoop]: Abstraction has has 372 places, 260 transitions, 2142 flow [2021-12-21 15:16:29,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:29,898 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:29,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-21 15:16:29,898 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2032434546, now seen corresponding path program 22 times [2021-12-21 15:16:29,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:29,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283692757] [2021-12-21 15:16:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:29,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:29,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283692757] [2021-12-21 15:16:29,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283692757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:29,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:29,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:29,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132535241] [2021-12-21 15:16:29,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:29,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:29,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:29,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:29,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 260 transitions, 2142 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:29,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:29,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:29,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:30,441 INFO L129 PetriNetUnfolder]: 311/1594 cut-off events. [2021-12-21 15:16:30,441 INFO L130 PetriNetUnfolder]: For 12310/12378 co-relation queries the response was YES. [2021-12-21 15:16:30,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6982 conditions, 1594 events. 311/1594 cut-off events. For 12310/12378 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11960 event pairs, 181 based on Foata normal form. 2/1533 useless extension candidates. Maximal degree in co-relation 6849. Up to 603 conditions per place. [2021-12-21 15:16:30,463 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 109 selfloop transitions, 39 changer transitions 31/325 dead transitions. [2021-12-21 15:16:30,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 325 transitions, 3439 flow [2021-12-21 15:16:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2920 transitions. [2021-12-21 15:16:30,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7628004179728317 [2021-12-21 15:16:30,465 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2920 transitions. [2021-12-21 15:16:30,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2920 transitions. [2021-12-21 15:16:30,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:30,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2920 transitions. [2021-12-21 15:16:30,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.72727272727272) internal successors, (2920), 22 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:30,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:30,469 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:30,469 INFO L186 Difference]: Start difference. First operand has 372 places, 260 transitions, 2142 flow. Second operand 22 states and 2920 transitions. [2021-12-21 15:16:30,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 325 transitions, 3439 flow [2021-12-21 15:16:30,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 325 transitions, 3189 flow, removed 87 selfloop flow, removed 19 redundant places. [2021-12-21 15:16:30,544 INFO L242 Difference]: Finished difference. Result has 368 places, 267 transitions, 2238 flow [2021-12-21 15:16:30,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2238, PETRI_PLACES=368, PETRI_TRANSITIONS=267} [2021-12-21 15:16:30,545 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 211 predicate places. [2021-12-21 15:16:30,545 INFO L470 AbstractCegarLoop]: Abstraction has has 368 places, 267 transitions, 2238 flow [2021-12-21 15:16:30,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:30,545 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:30,545 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:30,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-21 15:16:30,546 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:30,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1971432700, now seen corresponding path program 23 times [2021-12-21 15:16:30,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:30,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43009680] [2021-12-21 15:16:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:30,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:30,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43009680] [2021-12-21 15:16:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43009680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:30,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:30,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:30,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145427997] [2021-12-21 15:16:30,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:30,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:30,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:30,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:30,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 267 transitions, 2238 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:30,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:30,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:30,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:31,141 INFO L129 PetriNetUnfolder]: 315/1602 cut-off events. [2021-12-21 15:16:31,142 INFO L130 PetriNetUnfolder]: For 11225/11293 co-relation queries the response was YES. [2021-12-21 15:16:31,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7018 conditions, 1602 events. 315/1602 cut-off events. For 11225/11293 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11979 event pairs, 191 based on Foata normal form. 2/1536 useless extension candidates. Maximal degree in co-relation 6891. Up to 605 conditions per place. [2021-12-21 15:16:31,158 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 103 selfloop transitions, 46 changer transitions 30/325 dead transitions. [2021-12-21 15:16:31,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 325 transitions, 3441 flow [2021-12-21 15:16:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:16:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:16:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2792 transitions. [2021-12-21 15:16:31,160 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7640941434044882 [2021-12-21 15:16:31,160 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2792 transitions. [2021-12-21 15:16:31,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2792 transitions. [2021-12-21 15:16:31,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:31,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2792 transitions. [2021-12-21 15:16:31,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.95238095238096) internal successors, (2792), 21 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,164 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,164 INFO L186 Difference]: Start difference. First operand has 368 places, 267 transitions, 2238 flow. Second operand 21 states and 2792 transitions. [2021-12-21 15:16:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 325 transitions, 3441 flow [2021-12-21 15:16:31,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 325 transitions, 3330 flow, removed 40 selfloop flow, removed 7 redundant places. [2021-12-21 15:16:31,234 INFO L242 Difference]: Finished difference. Result has 382 places, 277 transitions, 2486 flow [2021-12-21 15:16:31,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2486, PETRI_PLACES=382, PETRI_TRANSITIONS=277} [2021-12-21 15:16:31,235 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 225 predicate places. [2021-12-21 15:16:31,235 INFO L470 AbstractCegarLoop]: Abstraction has has 382 places, 277 transitions, 2486 flow [2021-12-21 15:16:31,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,235 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:31,235 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:31,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-21 15:16:31,236 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 319486182, now seen corresponding path program 24 times [2021-12-21 15:16:31,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:31,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492218761] [2021-12-21 15:16:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:31,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:31,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:31,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492218761] [2021-12-21 15:16:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492218761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:31,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:31,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799973283] [2021-12-21 15:16:31,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:31,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:31,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:31,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:31,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:31,313 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:31,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 277 transitions, 2486 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:31,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:31,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:31,792 INFO L129 PetriNetUnfolder]: 311/1605 cut-off events. [2021-12-21 15:16:31,793 INFO L130 PetriNetUnfolder]: For 11604/11672 co-relation queries the response was YES. [2021-12-21 15:16:31,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7081 conditions, 1605 events. 311/1605 cut-off events. For 11604/11672 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12055 event pairs, 186 based on Foata normal form. 2/1540 useless extension candidates. Maximal degree in co-relation 6947. Up to 603 conditions per place. [2021-12-21 15:16:31,817 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 111 selfloop transitions, 41 changer transitions 31/329 dead transitions. [2021-12-21 15:16:31,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 329 transitions, 3666 flow [2021-12-21 15:16:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2923 transitions. [2021-12-21 15:16:31,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7635841170323929 [2021-12-21 15:16:31,820 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2923 transitions. [2021-12-21 15:16:31,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2923 transitions. [2021-12-21 15:16:31,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:31,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2923 transitions. [2021-12-21 15:16:31,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.86363636363637) internal successors, (2923), 22 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,824 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,824 INFO L186 Difference]: Start difference. First operand has 382 places, 277 transitions, 2486 flow. Second operand 22 states and 2923 transitions. [2021-12-21 15:16:31,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 329 transitions, 3666 flow [2021-12-21 15:16:31,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 329 transitions, 3515 flow, removed 46 selfloop flow, removed 9 redundant places. [2021-12-21 15:16:31,913 INFO L242 Difference]: Finished difference. Result has 395 places, 281 transitions, 2595 flow [2021-12-21 15:16:31,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2595, PETRI_PLACES=395, PETRI_TRANSITIONS=281} [2021-12-21 15:16:31,913 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 238 predicate places. [2021-12-21 15:16:31,914 INFO L470 AbstractCegarLoop]: Abstraction has has 395 places, 281 transitions, 2595 flow [2021-12-21 15:16:31,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:31,914 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:31,914 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:31,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-21 15:16:31,914 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash -859212732, now seen corresponding path program 25 times [2021-12-21 15:16:31,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:31,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541050813] [2021-12-21 15:16:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:31,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:32,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:32,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541050813] [2021-12-21 15:16:32,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541050813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:32,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:32,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:32,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954742938] [2021-12-21 15:16:32,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:32,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:32,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:32,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:32,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 281 transitions, 2595 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:32,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:32,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:32,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:32,486 INFO L129 PetriNetUnfolder]: 317/1623 cut-off events. [2021-12-21 15:16:32,486 INFO L130 PetriNetUnfolder]: For 12486/12554 co-relation queries the response was YES. [2021-12-21 15:16:32,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7322 conditions, 1623 events. 317/1623 cut-off events. For 12486/12554 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12202 event pairs, 185 based on Foata normal form. 2/1556 useless extension candidates. Maximal degree in co-relation 7183. Up to 605 conditions per place. [2021-12-21 15:16:32,507 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 103 selfloop transitions, 56 changer transitions 28/333 dead transitions. [2021-12-21 15:16:32,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 333 transitions, 3854 flow [2021-12-21 15:16:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2663 transitions. [2021-12-21 15:16:32,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7652298850574712 [2021-12-21 15:16:32,508 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2663 transitions. [2021-12-21 15:16:32,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2663 transitions. [2021-12-21 15:16:32,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:32,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2663 transitions. [2021-12-21 15:16:32,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 133.15) internal successors, (2663), 20 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:32,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:32,512 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:32,512 INFO L186 Difference]: Start difference. First operand has 395 places, 281 transitions, 2595 flow. Second operand 20 states and 2663 transitions. [2021-12-21 15:16:32,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 333 transitions, 3854 flow [2021-12-21 15:16:32,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 333 transitions, 3703 flow, removed 58 selfloop flow, removed 7 redundant places. [2021-12-21 15:16:32,597 INFO L242 Difference]: Finished difference. Result has 409 places, 293 transitions, 2931 flow [2021-12-21 15:16:32,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2931, PETRI_PLACES=409, PETRI_TRANSITIONS=293} [2021-12-21 15:16:32,598 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 252 predicate places. [2021-12-21 15:16:32,598 INFO L470 AbstractCegarLoop]: Abstraction has has 409 places, 293 transitions, 2931 flow [2021-12-21 15:16:32,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:32,598 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:32,598 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:32,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-21 15:16:32,598 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:32,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1691902910, now seen corresponding path program 26 times [2021-12-21 15:16:32,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:32,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622245360] [2021-12-21 15:16:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:32,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:32,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622245360] [2021-12-21 15:16:32,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622245360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:32,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:32,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:32,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229504666] [2021-12-21 15:16:32,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:32,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:32,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:32,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:32,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 293 transitions, 2931 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:32,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:32,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:32,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:33,213 INFO L129 PetriNetUnfolder]: 321/1633 cut-off events. [2021-12-21 15:16:33,213 INFO L130 PetriNetUnfolder]: For 13269/13337 co-relation queries the response was YES. [2021-12-21 15:16:33,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 1633 events. 321/1633 cut-off events. For 13269/13337 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12298 event pairs, 187 based on Foata normal form. 2/1564 useless extension candidates. Maximal degree in co-relation 7463. Up to 607 conditions per place. [2021-12-21 15:16:33,233 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 123 selfloop transitions, 46 changer transitions 28/343 dead transitions. [2021-12-21 15:16:33,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 343 transitions, 4256 flow [2021-12-21 15:16:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 15:16:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-21 15:16:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2924 transitions. [2021-12-21 15:16:33,234 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7638453500522466 [2021-12-21 15:16:33,235 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2924 transitions. [2021-12-21 15:16:33,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2924 transitions. [2021-12-21 15:16:33,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:33,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2924 transitions. [2021-12-21 15:16:33,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 132.9090909090909) internal successors, (2924), 22 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:33,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:33,238 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:33,238 INFO L186 Difference]: Start difference. First operand has 409 places, 293 transitions, 2931 flow. Second operand 22 states and 2924 transitions. [2021-12-21 15:16:33,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 343 transitions, 4256 flow [2021-12-21 15:16:33,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 343 transitions, 4020 flow, removed 70 selfloop flow, removed 9 redundant places. [2021-12-21 15:16:33,342 INFO L242 Difference]: Finished difference. Result has 422 places, 305 transitions, 3167 flow [2021-12-21 15:16:33,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3167, PETRI_PLACES=422, PETRI_TRANSITIONS=305} [2021-12-21 15:16:33,343 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 265 predicate places. [2021-12-21 15:16:33,343 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 305 transitions, 3167 flow [2021-12-21 15:16:33,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:33,343 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:33,343 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:33,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-21 15:16:33,344 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash 179737798, now seen corresponding path program 27 times [2021-12-21 15:16:33,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:33,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687107670] [2021-12-21 15:16:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:33,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:33,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:33,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687107670] [2021-12-21 15:16:33,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687107670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:33,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:33,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:33,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161287073] [2021-12-21 15:16:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:33,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:33,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:33,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:33,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 305 transitions, 3167 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:33,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:33,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:33,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:33,975 INFO L129 PetriNetUnfolder]: 316/1633 cut-off events. [2021-12-21 15:16:33,976 INFO L130 PetriNetUnfolder]: For 13511/13579 co-relation queries the response was YES. [2021-12-21 15:16:33,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7563 conditions, 1633 events. 316/1633 cut-off events. For 13511/13579 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12307 event pairs, 182 based on Foata normal form. 2/1566 useless extension candidates. Maximal degree in co-relation 7412. Up to 605 conditions per place. [2021-12-21 15:16:33,999 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 126 selfloop transitions, 48 changer transitions 30/350 dead transitions. [2021-12-21 15:16:33,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 350 transitions, 4435 flow [2021-12-21 15:16:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:16:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:16:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2797 transitions. [2021-12-21 15:16:34,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7654625068418172 [2021-12-21 15:16:34,001 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2797 transitions. [2021-12-21 15:16:34,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2797 transitions. [2021-12-21 15:16:34,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:34,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2797 transitions. [2021-12-21 15:16:34,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 133.1904761904762) internal successors, (2797), 21 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,005 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,005 INFO L186 Difference]: Start difference. First operand has 422 places, 305 transitions, 3167 flow. Second operand 21 states and 2797 transitions. [2021-12-21 15:16:34,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 350 transitions, 4435 flow [2021-12-21 15:16:34,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 350 transitions, 4164 flow, removed 116 selfloop flow, removed 6 redundant places. [2021-12-21 15:16:34,114 INFO L242 Difference]: Finished difference. Result has 437 places, 312 transitions, 3294 flow [2021-12-21 15:16:34,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3294, PETRI_PLACES=437, PETRI_TRANSITIONS=312} [2021-12-21 15:16:34,115 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 280 predicate places. [2021-12-21 15:16:34,115 INFO L470 AbstractCegarLoop]: Abstraction has has 437 places, 312 transitions, 3294 flow [2021-12-21 15:16:34,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:34,115 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:34,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-21 15:16:34,115 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash -876895094, now seen corresponding path program 28 times [2021-12-21 15:16:34,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:34,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85749802] [2021-12-21 15:16:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:34,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:34,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:34,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85749802] [2021-12-21 15:16:34,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85749802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:34,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:34,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:34,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174634024] [2021-12-21 15:16:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:34,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:34,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:34,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:34,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 312 transitions, 3294 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:34,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:34,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:34,710 INFO L129 PetriNetUnfolder]: 308/1618 cut-off events. [2021-12-21 15:16:34,710 INFO L130 PetriNetUnfolder]: For 12695/12763 co-relation queries the response was YES. [2021-12-21 15:16:34,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7343 conditions, 1618 events. 308/1618 cut-off events. For 12695/12763 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12267 event pairs, 179 based on Foata normal form. 2/1557 useless extension candidates. Maximal degree in co-relation 7184. Up to 602 conditions per place. [2021-12-21 15:16:34,736 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 129 selfloop transitions, 36 changer transitions 40/351 dead transitions. [2021-12-21 15:16:34,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 351 transitions, 4167 flow [2021-12-21 15:16:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:16:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-21 15:16:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2400 transitions. [2021-12-21 15:16:34,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7662835249042146 [2021-12-21 15:16:34,738 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2400 transitions. [2021-12-21 15:16:34,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2400 transitions. [2021-12-21 15:16:34,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:34,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2400 transitions. [2021-12-21 15:16:34,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 133.33333333333334) internal successors, (2400), 18 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,741 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,742 INFO L186 Difference]: Start difference. First operand has 437 places, 312 transitions, 3294 flow. Second operand 18 states and 2400 transitions. [2021-12-21 15:16:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 351 transitions, 4167 flow [2021-12-21 15:16:34,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 351 transitions, 4039 flow, removed 43 selfloop flow, removed 10 redundant places. [2021-12-21 15:16:34,878 INFO L242 Difference]: Finished difference. Result has 439 places, 292 transitions, 2869 flow [2021-12-21 15:16:34,878 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3172, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2869, PETRI_PLACES=439, PETRI_TRANSITIONS=292} [2021-12-21 15:16:34,878 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 282 predicate places. [2021-12-21 15:16:34,878 INFO L470 AbstractCegarLoop]: Abstraction has has 439 places, 292 transitions, 2869 flow [2021-12-21 15:16:34,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:34,879 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:34,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-21 15:16:34,879 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1930430014, now seen corresponding path program 29 times [2021-12-21 15:16:34,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:34,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799274893] [2021-12-21 15:16:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:34,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:34,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:34,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799274893] [2021-12-21 15:16:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799274893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:34,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:34,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:34,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618610408] [2021-12-21 15:16:34,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:34,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:34,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:34,961 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:34,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 292 transitions, 2869 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:34,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:34,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:34,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:35,444 INFO L129 PetriNetUnfolder]: 303/1602 cut-off events. [2021-12-21 15:16:35,445 INFO L130 PetriNetUnfolder]: For 12308/12376 co-relation queries the response was YES. [2021-12-21 15:16:35,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 1602 events. 303/1602 cut-off events. For 12308/12376 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 12116 event pairs, 183 based on Foata normal form. 2/1537 useless extension candidates. Maximal degree in co-relation 7027. Up to 600 conditions per place. [2021-12-21 15:16:35,467 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 120 selfloop transitions, 27 changer transitions 38/331 dead transitions. [2021-12-21 15:16:35,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 331 transitions, 3764 flow [2021-12-21 15:16:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2531 transitions. [2021-12-21 15:16:35,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7655777374470659 [2021-12-21 15:16:35,468 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2531 transitions. [2021-12-21 15:16:35,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2531 transitions. [2021-12-21 15:16:35,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:35,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2531 transitions. [2021-12-21 15:16:35,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.21052631578948) internal successors, (2531), 19 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:35,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:35,472 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:35,472 INFO L186 Difference]: Start difference. First operand has 439 places, 292 transitions, 2869 flow. Second operand 19 states and 2531 transitions. [2021-12-21 15:16:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 331 transitions, 3764 flow [2021-12-21 15:16:35,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 331 transitions, 3487 flow, removed 30 selfloop flow, removed 23 redundant places. [2021-12-21 15:16:35,562 INFO L242 Difference]: Finished difference. Result has 417 places, 281 transitions, 2518 flow [2021-12-21 15:16:35,562 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2518, PETRI_PLACES=417, PETRI_TRANSITIONS=281} [2021-12-21 15:16:35,562 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 260 predicate places. [2021-12-21 15:16:35,562 INFO L470 AbstractCegarLoop]: Abstraction has has 417 places, 281 transitions, 2518 flow [2021-12-21 15:16:35,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:35,563 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:35,563 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:35,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-12-21 15:16:35,563 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1748211298, now seen corresponding path program 30 times [2021-12-21 15:16:35,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953881248] [2021-12-21 15:16:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:35,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:35,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:35,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953881248] [2021-12-21 15:16:35,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953881248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:35,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:35,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:35,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329888255] [2021-12-21 15:16:35,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:35,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:35,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:35,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:35,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:35,649 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:35,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 281 transitions, 2518 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:35,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:35,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:35,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:36,104 INFO L129 PetriNetUnfolder]: 288/1544 cut-off events. [2021-12-21 15:16:36,104 INFO L130 PetriNetUnfolder]: For 10362/10430 co-relation queries the response was YES. [2021-12-21 15:16:36,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6495 conditions, 1544 events. 288/1544 cut-off events. For 10362/10430 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11548 event pairs, 180 based on Foata normal form. 2/1481 useless extension candidates. Maximal degree in co-relation 6346. Up to 596 conditions per place. [2021-12-21 15:16:36,125 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 109 selfloop transitions, 15 changer transitions 39/309 dead transitions. [2021-12-21 15:16:36,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 309 transitions, 3139 flow [2021-12-21 15:16:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2651 transitions. [2021-12-21 15:16:36,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7617816091954023 [2021-12-21 15:16:36,127 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2651 transitions. [2021-12-21 15:16:36,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2651 transitions. [2021-12-21 15:16:36,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:36,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2651 transitions. [2021-12-21 15:16:36,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.55) internal successors, (2651), 20 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,131 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,131 INFO L186 Difference]: Start difference. First operand has 417 places, 281 transitions, 2518 flow. Second operand 20 states and 2651 transitions. [2021-12-21 15:16:36,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 309 transitions, 3139 flow [2021-12-21 15:16:36,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 309 transitions, 2988 flow, removed 21 selfloop flow, removed 23 redundant places. [2021-12-21 15:16:36,208 INFO L242 Difference]: Finished difference. Result has 400 places, 258 transitions, 2065 flow [2021-12-21 15:16:36,208 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2065, PETRI_PLACES=400, PETRI_TRANSITIONS=258} [2021-12-21 15:16:36,208 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 243 predicate places. [2021-12-21 15:16:36,208 INFO L470 AbstractCegarLoop]: Abstraction has has 400 places, 258 transitions, 2065 flow [2021-12-21 15:16:36,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:36,209 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:36,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-12-21 15:16:36,209 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash -839816810, now seen corresponding path program 31 times [2021-12-21 15:16:36,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455609827] [2021-12-21 15:16:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:36,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:36,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:36,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455609827] [2021-12-21 15:16:36,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455609827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:36,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:36,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:36,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428385527] [2021-12-21 15:16:36,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:36,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:36,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:36,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:36,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 258 transitions, 2065 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:36,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:36,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:36,823 INFO L129 PetriNetUnfolder]: 299/1572 cut-off events. [2021-12-21 15:16:36,824 INFO L130 PetriNetUnfolder]: For 10476/10544 co-relation queries the response was YES. [2021-12-21 15:16:36,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6608 conditions, 1572 events. 299/1572 cut-off events. For 10476/10544 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11745 event pairs, 184 based on Foata normal form. 2/1506 useless extension candidates. Maximal degree in co-relation 6468. Up to 596 conditions per place. [2021-12-21 15:16:36,843 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 91 selfloop transitions, 37 changer transitions 39/313 dead transitions. [2021-12-21 15:16:36,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 313 transitions, 3183 flow [2021-12-21 15:16:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 15:16:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-21 15:16:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3188 transitions. [2021-12-21 15:16:36,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7634099616858238 [2021-12-21 15:16:36,845 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3188 transitions. [2021-12-21 15:16:36,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3188 transitions. [2021-12-21 15:16:36,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:36,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3188 transitions. [2021-12-21 15:16:36,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 132.83333333333334) internal successors, (3188), 24 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,849 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,850 INFO L186 Difference]: Start difference. First operand has 400 places, 258 transitions, 2065 flow. Second operand 24 states and 3188 transitions. [2021-12-21 15:16:36,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 313 transitions, 3183 flow [2021-12-21 15:16:36,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 313 transitions, 2985 flow, removed 24 selfloop flow, removed 20 redundant places. [2021-12-21 15:16:36,932 INFO L242 Difference]: Finished difference. Result has 386 places, 263 transitions, 2176 flow [2021-12-21 15:16:36,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2176, PETRI_PLACES=386, PETRI_TRANSITIONS=263} [2021-12-21 15:16:36,933 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 229 predicate places. [2021-12-21 15:16:36,933 INFO L470 AbstractCegarLoop]: Abstraction has has 386 places, 263 transitions, 2176 flow [2021-12-21 15:16:36,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:36,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:36,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:36,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-12-21 15:16:36,933 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1447701686, now seen corresponding path program 32 times [2021-12-21 15:16:36,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:36,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170803639] [2021-12-21 15:16:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:36,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:37,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170803639] [2021-12-21 15:16:37,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170803639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:37,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:37,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:37,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896358714] [2021-12-21 15:16:37,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:37,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:37,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:37,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:37,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 263 transitions, 2176 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:37,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:37,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:37,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:37,579 INFO L129 PetriNetUnfolder]: 294/1570 cut-off events. [2021-12-21 15:16:37,579 INFO L130 PetriNetUnfolder]: For 9845/9913 co-relation queries the response was YES. [2021-12-21 15:16:37,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6400 conditions, 1570 events. 294/1570 cut-off events. For 9845/9913 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11715 event pairs, 179 based on Foata normal form. 2/1504 useless extension candidates. Maximal degree in co-relation 6259. Up to 596 conditions per place. [2021-12-21 15:16:37,599 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 95 selfloop transitions, 32 changer transitions 44/317 dead transitions. [2021-12-21 15:16:37,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 317 transitions, 3274 flow [2021-12-21 15:16:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 15:16:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-21 15:16:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3057 transitions. [2021-12-21 15:16:37,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7638680659670165 [2021-12-21 15:16:37,601 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3057 transitions. [2021-12-21 15:16:37,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3057 transitions. [2021-12-21 15:16:37,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:37,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3057 transitions. [2021-12-21 15:16:37,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.91304347826087) internal successors, (3057), 23 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:37,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:37,605 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:37,605 INFO L186 Difference]: Start difference. First operand has 386 places, 263 transitions, 2176 flow. Second operand 23 states and 3057 transitions. [2021-12-21 15:16:37,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 317 transitions, 3274 flow [2021-12-21 15:16:37,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 317 transitions, 3154 flow, removed 42 selfloop flow, removed 14 redundant places. [2021-12-21 15:16:37,671 INFO L242 Difference]: Finished difference. Result has 392 places, 262 transitions, 2194 flow [2021-12-21 15:16:37,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2098, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2194, PETRI_PLACES=392, PETRI_TRANSITIONS=262} [2021-12-21 15:16:37,671 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 235 predicate places. [2021-12-21 15:16:37,672 INFO L470 AbstractCegarLoop]: Abstraction has has 392 places, 262 transitions, 2194 flow [2021-12-21 15:16:37,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:37,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:37,672 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:37,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-12-21 15:16:37,672 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1224200426, now seen corresponding path program 33 times [2021-12-21 15:16:37,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381644464] [2021-12-21 15:16:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:37,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:37,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381644464] [2021-12-21 15:16:37,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381644464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:37,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:37,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:37,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570504134] [2021-12-21 15:16:37,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:37,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:37,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:37,764 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:37,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 262 transitions, 2194 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:37,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:37,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:37,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:38,177 INFO L129 PetriNetUnfolder]: 276/1513 cut-off events. [2021-12-21 15:16:38,177 INFO L130 PetriNetUnfolder]: For 9111/9179 co-relation queries the response was YES. [2021-12-21 15:16:38,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6027 conditions, 1513 events. 276/1513 cut-off events. For 9111/9179 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11269 event pairs, 177 based on Foata normal form. 2/1447 useless extension candidates. Maximal degree in co-relation 5885. Up to 594 conditions per place. [2021-12-21 15:16:38,196 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 83 selfloop transitions, 21 changer transitions 37/287 dead transitions. [2021-12-21 15:16:38,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 287 transitions, 2743 flow [2021-12-21 15:16:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2659 transitions. [2021-12-21 15:16:38,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764080459770115 [2021-12-21 15:16:38,198 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2659 transitions. [2021-12-21 15:16:38,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2659 transitions. [2021-12-21 15:16:38,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:38,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2659 transitions. [2021-12-21 15:16:38,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.95) internal successors, (2659), 20 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,201 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,201 INFO L186 Difference]: Start difference. First operand has 392 places, 262 transitions, 2194 flow. Second operand 20 states and 2659 transitions. [2021-12-21 15:16:38,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 287 transitions, 2743 flow [2021-12-21 15:16:38,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 287 transitions, 2572 flow, removed 33 selfloop flow, removed 21 redundant places. [2021-12-21 15:16:38,263 INFO L242 Difference]: Finished difference. Result has 383 places, 244 transitions, 1807 flow [2021-12-21 15:16:38,264 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1807, PETRI_PLACES=383, PETRI_TRANSITIONS=244} [2021-12-21 15:16:38,264 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 226 predicate places. [2021-12-21 15:16:38,264 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 244 transitions, 1807 flow [2021-12-21 15:16:38,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,264 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:38,264 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:38,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-12-21 15:16:38,264 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash -267571106, now seen corresponding path program 34 times [2021-12-21 15:16:38,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:38,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417274132] [2021-12-21 15:16:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:38,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:38,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:38,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417274132] [2021-12-21 15:16:38,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417274132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:38,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:38,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:38,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393158077] [2021-12-21 15:16:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:38,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:38,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:38,359 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:38,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 244 transitions, 1807 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:38,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:38,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:38,813 INFO L129 PetriNetUnfolder]: 271/1492 cut-off events. [2021-12-21 15:16:38,813 INFO L130 PetriNetUnfolder]: For 8404/8472 co-relation queries the response was YES. [2021-12-21 15:16:38,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5785 conditions, 1492 events. 271/1492 cut-off events. For 8404/8472 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11044 event pairs, 178 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 5652. Up to 592 conditions per place. [2021-12-21 15:16:38,831 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 77 selfloop transitions, 16 changer transitions 36/275 dead transitions. [2021-12-21 15:16:38,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 275 transitions, 2441 flow [2021-12-21 15:16:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 15:16:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-21 15:16:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2528 transitions. [2021-12-21 15:16:38,833 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764670296430732 [2021-12-21 15:16:38,833 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2528 transitions. [2021-12-21 15:16:38,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2528 transitions. [2021-12-21 15:16:38,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:38,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2528 transitions. [2021-12-21 15:16:38,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.05263157894737) internal successors, (2528), 19 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,837 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,837 INFO L186 Difference]: Start difference. First operand has 383 places, 244 transitions, 1807 flow. Second operand 19 states and 2528 transitions. [2021-12-21 15:16:38,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 275 transitions, 2441 flow [2021-12-21 15:16:38,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 275 transitions, 2267 flow, removed 21 selfloop flow, removed 22 redundant places. [2021-12-21 15:16:38,894 INFO L242 Difference]: Finished difference. Result has 361 places, 233 transitions, 1553 flow [2021-12-21 15:16:38,894 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1553, PETRI_PLACES=361, PETRI_TRANSITIONS=233} [2021-12-21 15:16:38,895 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 204 predicate places. [2021-12-21 15:16:38,895 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 233 transitions, 1553 flow [2021-12-21 15:16:38,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:38,895 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:38,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-12-21 15:16:38,895 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1344371362, now seen corresponding path program 35 times [2021-12-21 15:16:38,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:38,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315987319] [2021-12-21 15:16:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:38,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:38,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:38,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315987319] [2021-12-21 15:16:38,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315987319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:38,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:38,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:16:38,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035246945] [2021-12-21 15:16:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:38,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:16:38,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:16:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:16:38,990 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 174 [2021-12-21 15:16:38,990 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 233 transitions, 1553 flow. Second operand has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:38,990 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:38,990 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 174 [2021-12-21 15:16:38,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:39,410 INFO L129 PetriNetUnfolder]: 256/1404 cut-off events. [2021-12-21 15:16:39,410 INFO L130 PetriNetUnfolder]: For 7395/7463 co-relation queries the response was YES. [2021-12-21 15:16:39,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5272 conditions, 1404 events. 256/1404 cut-off events. For 7395/7463 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 10231 event pairs, 171 based on Foata normal form. 2/1340 useless extension candidates. Maximal degree in co-relation 5146. Up to 571 conditions per place. [2021-12-21 15:16:39,427 INFO L132 encePairwiseOnDemand]: 159/174 looper letters, 66 selfloop transitions, 2 changer transitions 40/252 dead transitions. [2021-12-21 15:16:39,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 252 transitions, 1941 flow [2021-12-21 15:16:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:16:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:16:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2645 transitions. [2021-12-21 15:16:39,429 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7600574712643678 [2021-12-21 15:16:39,429 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2645 transitions. [2021-12-21 15:16:39,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2645 transitions. [2021-12-21 15:16:39,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:39,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2645 transitions. [2021-12-21 15:16:39,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.25) internal successors, (2645), 20 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:39,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:39,433 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 174.0) internal successors, (3654), 21 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:39,433 INFO L186 Difference]: Start difference. First operand has 361 places, 233 transitions, 1553 flow. Second operand 20 states and 2645 transitions. [2021-12-21 15:16:39,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 252 transitions, 1941 flow [2021-12-21 15:16:39,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 252 transitions, 1834 flow, removed 21 selfloop flow, removed 22 redundant places. [2021-12-21 15:16:39,477 INFO L242 Difference]: Finished difference. Result has 345 places, 206 transitions, 1141 flow [2021-12-21 15:16:39,477 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1141, PETRI_PLACES=345, PETRI_TRANSITIONS=206} [2021-12-21 15:16:39,477 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 188 predicate places. [2021-12-21 15:16:39,477 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 206 transitions, 1141 flow [2021-12-21 15:16:39,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.72727272727272) internal successors, (1438), 11 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:39,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:39,478 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:39,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-12-21 15:16:39,478 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:39,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1165386839, now seen corresponding path program 1 times [2021-12-21 15:16:39,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:39,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622479318] [2021-12-21 15:16:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:39,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:39,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622479318] [2021-12-21 15:16:39,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622479318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:39,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:39,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-21 15:16:39,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107772841] [2021-12-21 15:16:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:39,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 15:16:39,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 15:16:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-21 15:16:39,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-12-21 15:16:39,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 206 transitions, 1141 flow. Second operand has 18 states, 18 states have (on average 101.83333333333333) internal successors, (1833), 18 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:39,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:39,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-12-21 15:16:39,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:41,119 INFO L129 PetriNetUnfolder]: 769/3123 cut-off events. [2021-12-21 15:16:41,120 INFO L130 PetriNetUnfolder]: For 14013/14047 co-relation queries the response was YES. [2021-12-21 15:16:41,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10237 conditions, 3123 events. 769/3123 cut-off events. For 14013/14047 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 25836 event pairs, 277 based on Foata normal form. 27/3032 useless extension candidates. Maximal degree in co-relation 10119. Up to 518 conditions per place. [2021-12-21 15:16:41,155 INFO L132 encePairwiseOnDemand]: 147/174 looper letters, 257 selfloop transitions, 35 changer transitions 60/439 dead transitions. [2021-12-21 15:16:41,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 439 transitions, 3413 flow [2021-12-21 15:16:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 15:16:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-21 15:16:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3042 transitions. [2021-12-21 15:16:41,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.624384236453202 [2021-12-21 15:16:41,157 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3042 transitions. [2021-12-21 15:16:41,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3042 transitions. [2021-12-21 15:16:41,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:41,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3042 transitions. [2021-12-21 15:16:41,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 108.64285714285714) internal successors, (3042), 28 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,162 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,162 INFO L186 Difference]: Start difference. First operand has 345 places, 206 transitions, 1141 flow. Second operand 28 states and 3042 transitions. [2021-12-21 15:16:41,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 439 transitions, 3413 flow [2021-12-21 15:16:41,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 439 transitions, 3223 flow, removed 73 selfloop flow, removed 28 redundant places. [2021-12-21 15:16:41,210 INFO L242 Difference]: Finished difference. Result has 331 places, 214 transitions, 1298 flow [2021-12-21 15:16:41,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1298, PETRI_PLACES=331, PETRI_TRANSITIONS=214} [2021-12-21 15:16:41,210 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 174 predicate places. [2021-12-21 15:16:41,211 INFO L470 AbstractCegarLoop]: Abstraction has has 331 places, 214 transitions, 1298 flow [2021-12-21 15:16:41,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.83333333333333) internal successors, (1833), 18 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:41,211 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:41,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-12-21 15:16:41,211 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2074009625, now seen corresponding path program 2 times [2021-12-21 15:16:41,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:41,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406370598] [2021-12-21 15:16:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:41,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:41,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:41,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406370598] [2021-12-21 15:16:41,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406370598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:41,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:41,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:16:41,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595274188] [2021-12-21 15:16:41,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:41,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:16:41,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:41,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:16:41,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:16:41,268 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 174 [2021-12-21 15:16:41,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 214 transitions, 1298 flow. Second operand has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:41,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 174 [2021-12-21 15:16:41,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:41,464 INFO L129 PetriNetUnfolder]: 121/1138 cut-off events. [2021-12-21 15:16:41,464 INFO L130 PetriNetUnfolder]: For 7057/7098 co-relation queries the response was YES. [2021-12-21 15:16:41,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3815 conditions, 1138 events. 121/1138 cut-off events. For 7057/7098 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7597 event pairs, 66 based on Foata normal form. 28/1126 useless extension candidates. Maximal degree in co-relation 3697. Up to 76 conditions per place. [2021-12-21 15:16:41,477 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 39 selfloop transitions, 6 changer transitions 28/220 dead transitions. [2021-12-21 15:16:41,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 220 transitions, 1411 flow [2021-12-21 15:16:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:16:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:16:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 746 transitions. [2021-12-21 15:16:41,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8574712643678161 [2021-12-21 15:16:41,516 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 746 transitions. [2021-12-21 15:16:41,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 746 transitions. [2021-12-21 15:16:41,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:41,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 746 transitions. [2021-12-21 15:16:41,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,517 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,517 INFO L186 Difference]: Start difference. First operand has 331 places, 214 transitions, 1298 flow. Second operand 5 states and 746 transitions. [2021-12-21 15:16:41,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 220 transitions, 1411 flow [2021-12-21 15:16:41,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 220 transitions, 1222 flow, removed 81 selfloop flow, removed 31 redundant places. [2021-12-21 15:16:41,545 INFO L242 Difference]: Finished difference. Result has 274 places, 187 transitions, 874 flow [2021-12-21 15:16:41,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=274, PETRI_TRANSITIONS=187} [2021-12-21 15:16:41,546 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 117 predicate places. [2021-12-21 15:16:41,546 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 187 transitions, 874 flow [2021-12-21 15:16:41,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:41,546 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:41,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-12-21 15:16:41,547 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:41,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1146373095, now seen corresponding path program 1 times [2021-12-21 15:16:41,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:41,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853829177] [2021-12-21 15:16:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:41,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:41,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853829177] [2021-12-21 15:16:41,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853829177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:41,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:41,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 15:16:41,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713051939] [2021-12-21 15:16:41,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:41,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:16:41,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:16:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 15:16:41,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 174 [2021-12-21 15:16:41,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 187 transitions, 874 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:41,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 174 [2021-12-21 15:16:41,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:16:41,691 INFO L129 PetriNetUnfolder]: 42/474 cut-off events. [2021-12-21 15:16:41,691 INFO L130 PetriNetUnfolder]: For 1167/1167 co-relation queries the response was YES. [2021-12-21 15:16:41,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1211 conditions, 474 events. 42/474 cut-off events. For 1167/1167 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1944 event pairs, 29 based on Foata normal form. 10/461 useless extension candidates. Maximal degree in co-relation 1123. Up to 65 conditions per place. [2021-12-21 15:16:41,696 INFO L132 encePairwiseOnDemand]: 170/174 looper letters, 27 selfloop transitions, 2 changer transitions 0/148 dead transitions. [2021-12-21 15:16:41,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 148 transitions, 591 flow [2021-12-21 15:16:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:16:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:16:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2021-12-21 15:16:41,697 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8524904214559387 [2021-12-21 15:16:41,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2021-12-21 15:16:41,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2021-12-21 15:16:41,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:16:41,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2021-12-21 15:16:41,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,699 INFO L186 Difference]: Start difference. First operand has 274 places, 187 transitions, 874 flow. Second operand 3 states and 445 transitions. [2021-12-21 15:16:41,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 148 transitions, 591 flow [2021-12-21 15:16:41,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 148 transitions, 489 flow, removed 32 selfloop flow, removed 32 redundant places. [2021-12-21 15:16:41,705 INFO L242 Difference]: Finished difference. Result has 207 places, 147 transitions, 432 flow [2021-12-21 15:16:41,705 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=207, PETRI_TRANSITIONS=147} [2021-12-21 15:16:41,705 INFO L334 CegarLoopForPetriNet]: 157 programPoint places, 50 predicate places. [2021-12-21 15:16:41,705 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 147 transitions, 432 flow [2021-12-21 15:16:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:41,705 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:16:41,706 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:16:41,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-12-21 15:16:41,706 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:16:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:16:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1592495771, now seen corresponding path program 1 times [2021-12-21 15:16:41,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:16:41,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473380866] [2021-12-21 15:16:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:16:41,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:16:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:16:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:16:42,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:16:42,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473380866] [2021-12-21 15:16:42,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473380866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:16:42,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:16:42,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-12-21 15:16:42,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516366656] [2021-12-21 15:16:42,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:16:42,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 15:16:42,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:16:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 15:16:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-12-21 15:16:42,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2021-12-21 15:16:42,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 147 transitions, 432 flow. Second operand has 31 states, 31 states have (on average 85.19354838709677) internal successors, (2641), 31 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:16:42,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:16:42,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2021-12-21 15:16:42,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand