./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:56:15,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:56:15,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:56:15,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:56:15,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:56:15,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:56:15,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:56:15,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:56:15,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:56:15,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:56:15,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:56:15,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:56:15,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:56:15,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:56:15,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:56:15,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:56:15,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:56:15,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:56:15,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:56:15,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:56:15,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:56:15,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:56:15,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:56:15,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:56:15,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:56:15,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:56:15,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:56:15,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:56:15,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:56:15,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:56:15,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:56:15,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:56:15,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:56:15,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:56:15,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:56:15,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:56:15,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:56:15,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:56:15,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:56:15,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:56:15,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:56:15,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:56:15,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:56:15,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:56:15,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:56:15,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:56:15,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:56:15,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:56:15,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:56:15,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:56:15,459 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:56:15,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:56:15,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:56:15,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:56:15,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:56:15,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:56:15,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:56:15,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:56:15,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:56:15,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:56:15,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:56:15,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:56:15,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:56:15,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:56:15,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:56:15,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:56:15,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:56:15,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:56:15,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:56:15,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:56:15,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:56:15,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:56:15,463 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:56:15,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:56:15,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:56:15,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:56:15,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2021-12-14 16:56:15,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:56:15,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:56:15,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:56:15,699 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:56:15,699 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:56:15,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2021-12-14 16:56:15,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f94dc7cf/25c13fb8978f4a568be44e1c8cb70b3d/FLAGa1a66b9c3 [2021-12-14 16:56:16,100 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:56:16,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2021-12-14 16:56:16,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f94dc7cf/25c13fb8978f4a568be44e1c8cb70b3d/FLAGa1a66b9c3 [2021-12-14 16:56:16,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f94dc7cf/25c13fb8978f4a568be44e1c8cb70b3d [2021-12-14 16:56:16,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:56:16,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:56:16,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:56:16,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:56:16,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:56:16,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ca0d6c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16, skipping insertion in model container [2021-12-14 16:56:16,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:56:16,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:56:16,313 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/unroll-3.wvr.c[2500,2513] [2021-12-14 16:56:16,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:56:16,322 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:56:16,342 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/unroll-3.wvr.c[2500,2513] [2021-12-14 16:56:16,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:56:16,352 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:56:16,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16 WrapperNode [2021-12-14 16:56:16,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:56:16,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:56:16,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:56:16,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:56:16,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,397 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2021-12-14 16:56:16,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:56:16,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:56:16,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:56:16,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:56:16,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:56:16,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:56:16,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:56:16,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:56:16,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (1/1) ... [2021-12-14 16:56:16,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:56:16,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:16,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:56:16,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:56:16,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:56:16,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:56:16,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:56:16,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:56:16,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:56:16,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:56:16,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:56:16,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:56:16,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 16:56:16,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:56:16,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:56:16,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:56:16,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:56:16,523 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:56:16,616 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:56:16,632 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:56:16,811 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:56:16,818 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:56:16,818 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 16:56:16,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:56:16 BoogieIcfgContainer [2021-12-14 16:56:16,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:56:16,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:56:16,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:56:16,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:56:16,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:56:16" (1/3) ... [2021-12-14 16:56:16,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b98abc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:56:16, skipping insertion in model container [2021-12-14 16:56:16,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:56:16" (2/3) ... [2021-12-14 16:56:16,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b98abc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:56:16, skipping insertion in model container [2021-12-14 16:56:16,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:56:16" (3/3) ... [2021-12-14 16:56:16,825 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2021-12-14 16:56:16,829 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:56:16,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:56:16,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:56:16,830 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:56:16,852 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,853 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,854 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,857 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,858 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,859 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,860 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,861 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,862 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,863 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,864 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,865 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,866 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,867 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,868 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,868 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,868 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,868 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,868 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,869 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,869 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,869 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,869 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,869 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,870 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,870 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,870 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,870 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,870 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,870 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,871 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,872 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,873 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,874 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,875 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,876 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,878 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,879 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,882 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,883 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,884 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:56:16,886 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:56:16,926 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:56:16,935 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:56:16,936 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:56:16,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 386 flow [2021-12-14 16:56:17,058 INFO L129 PetriNetUnfolder]: 15/183 cut-off events. [2021-12-14 16:56:17,060 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:56:17,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 15/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2021-12-14 16:56:17,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 386 flow [2021-12-14 16:56:17,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2021-12-14 16:56:17,112 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2021-12-14 16:56:17,112 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:56:17,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:17,113 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] [2021-12-14 16:56:17,114 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash 684426458, now seen corresponding path program 1 times [2021-12-14 16:56:17,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669980675] [2021-12-14 16:56:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:17,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:17,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:17,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669980675] [2021-12-14 16:56:17,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669980675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:17,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:17,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:56:17,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342085274] [2021-12-14 16:56:17,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:17,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:56:17,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:56:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:56:17,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 185 [2021-12-14 16:56:17,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 174 transitions, 360 flow. Second operand has 2 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:17,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 185 [2021-12-14 16:56:17,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:17,462 INFO L129 PetriNetUnfolder]: 3/162 cut-off events. [2021-12-14 16:56:17,463 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-14 16:56:17,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 162 events. 3/162 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 143 event pairs, 0 based on Foata normal form. 15/165 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2021-12-14 16:56:17,466 INFO L132 encePairwiseOnDemand]: 173/185 looper letters, 4 selfloop transitions, 0 changer transitions 5/162 dead transitions. [2021-12-14 16:56:17,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 162 transitions, 344 flow [2021-12-14 16:56:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:56:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:56:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 352 transitions. [2021-12-14 16:56:17,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9513513513513514 [2021-12-14 16:56:17,481 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 352 transitions. [2021-12-14 16:56:17,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 352 transitions. [2021-12-14 16:56:17,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:17,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 352 transitions. [2021-12-14 16:56:17,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.0) internal successors, (352), 2 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,495 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,496 INFO L186 Difference]: Start difference. First operand has 166 places, 174 transitions, 360 flow. Second operand 2 states and 352 transitions. [2021-12-14 16:56:17,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 162 transitions, 344 flow [2021-12-14 16:56:17,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 162 transitions, 336 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:56:17,503 INFO L242 Difference]: Finished difference. Result has 163 places, 157 transitions, 318 flow [2021-12-14 16:56:17,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=318, PETRI_PLACES=163, PETRI_TRANSITIONS=157} [2021-12-14 16:56:17,510 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, -3 predicate places. [2021-12-14 16:56:17,510 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 157 transitions, 318 flow [2021-12-14 16:56:17,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:17,511 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] [2021-12-14 16:56:17,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:56:17,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1060148991, now seen corresponding path program 1 times [2021-12-14 16:56:17,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:17,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468283691] [2021-12-14 16:56:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:17,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:17,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468283691] [2021-12-14 16:56:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468283691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:17,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:17,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:56:17,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307276819] [2021-12-14 16:56:17,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:17,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:56:17,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:56:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:56:17,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 185 [2021-12-14 16:56:17,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 157 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:17,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 185 [2021-12-14 16:56:17,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:17,865 INFO L129 PetriNetUnfolder]: 18/255 cut-off events. [2021-12-14 16:56:17,865 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-12-14 16:56:17,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 255 events. 18/255 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 539 event pairs, 7 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 324. Up to 54 conditions per place. [2021-12-14 16:56:17,866 INFO L132 encePairwiseOnDemand]: 177/185 looper letters, 37 selfloop transitions, 7 changer transitions 0/161 dead transitions. [2021-12-14 16:56:17,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 161 transitions, 414 flow [2021-12-14 16:56:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:56:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:56:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1061 transitions. [2021-12-14 16:56:17,870 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7168918918918918 [2021-12-14 16:56:17,870 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1061 transitions. [2021-12-14 16:56:17,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1061 transitions. [2021-12-14 16:56:17,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:17,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1061 transitions. [2021-12-14 16:56:17,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,877 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,877 INFO L186 Difference]: Start difference. First operand has 163 places, 157 transitions, 318 flow. Second operand 8 states and 1061 transitions. [2021-12-14 16:56:17,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 161 transitions, 414 flow [2021-12-14 16:56:17,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 161 transitions, 414 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:56:17,880 INFO L242 Difference]: Finished difference. Result has 166 places, 158 transitions, 340 flow [2021-12-14 16:56:17,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2021-12-14 16:56:17,881 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 0 predicate places. [2021-12-14 16:56:17,882 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 340 flow [2021-12-14 16:56:17,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:17,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:17,883 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:17,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:56:17,883 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash 379398891, now seen corresponding path program 1 times [2021-12-14 16:56:17,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:17,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660623610] [2021-12-14 16:56:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:17,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:17,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660623610] [2021-12-14 16:56:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660623610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:17,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:56:17,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017554028] [2021-12-14 16:56:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:17,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:56:17,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:56:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:56:17,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 185 [2021-12-14 16:56:18,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:18,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 185 [2021-12-14 16:56:18,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:18,178 INFO L129 PetriNetUnfolder]: 97/658 cut-off events. [2021-12-14 16:56:18,178 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-12-14 16:56:18,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 658 events. 97/658 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3383 event pairs, 29 based on Foata normal form. 1/611 useless extension candidates. Maximal degree in co-relation 897. Up to 106 conditions per place. [2021-12-14 16:56:18,184 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 59 selfloop transitions, 5 changer transitions 4/188 dead transitions. [2021-12-14 16:56:18,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 188 transitions, 541 flow [2021-12-14 16:56:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:56:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:56:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 843 transitions. [2021-12-14 16:56:18,186 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7594594594594595 [2021-12-14 16:56:18,187 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 843 transitions. [2021-12-14 16:56:18,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 843 transitions. [2021-12-14 16:56:18,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:18,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 843 transitions. [2021-12-14 16:56:18,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.5) internal successors, (843), 6 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,192 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,192 INFO L186 Difference]: Start difference. First operand has 166 places, 158 transitions, 340 flow. Second operand 6 states and 843 transitions. [2021-12-14 16:56:18,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 188 transitions, 541 flow [2021-12-14 16:56:18,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 188 transitions, 529 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-14 16:56:18,197 INFO L242 Difference]: Finished difference. Result has 168 places, 161 transitions, 357 flow [2021-12-14 16:56:18,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=168, PETRI_TRANSITIONS=161} [2021-12-14 16:56:18,199 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 2 predicate places. [2021-12-14 16:56:18,199 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 161 transitions, 357 flow [2021-12-14 16:56:18,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:18,200 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] [2021-12-14 16:56:18,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:56:18,201 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -911126786, now seen corresponding path program 1 times [2021-12-14 16:56:18,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:18,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786785705] [2021-12-14 16:56:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:18,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:18,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:18,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786785705] [2021-12-14 16:56:18,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786785705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:18,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971003637] [2021-12-14 16:56:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:18,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:18,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:18,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:18,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:56:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 16:56:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:18,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:18,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971003637] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:18,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:56:18,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2021-12-14 16:56:18,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593512418] [2021-12-14 16:56:18,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:18,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:56:18,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:56:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:56:18,800 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2021-12-14 16:56:18,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 161 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:18,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2021-12-14 16:56:18,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:18,891 INFO L129 PetriNetUnfolder]: 96/702 cut-off events. [2021-12-14 16:56:18,892 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-12-14 16:56:18,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 702 events. 96/702 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3608 event pairs, 13 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 929. Up to 111 conditions per place. [2021-12-14 16:56:18,895 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 24 selfloop transitions, 5 changer transitions 1/173 dead transitions. [2021-12-14 16:56:18,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 173 transitions, 445 flow [2021-12-14 16:56:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:56:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-14 16:56:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2021-12-14 16:56:18,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8743243243243243 [2021-12-14 16:56:18,897 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2021-12-14 16:56:18,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2021-12-14 16:56:18,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:18,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2021-12-14 16:56:18,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,901 INFO L186 Difference]: Start difference. First operand has 168 places, 161 transitions, 357 flow. Second operand 4 states and 647 transitions. [2021-12-14 16:56:18,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 173 transitions, 445 flow [2021-12-14 16:56:18,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 173 transitions, 441 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-14 16:56:18,905 INFO L242 Difference]: Finished difference. Result has 170 places, 165 transitions, 389 flow [2021-12-14 16:56:18,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=170, PETRI_TRANSITIONS=165} [2021-12-14 16:56:18,906 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 4 predicate places. [2021-12-14 16:56:18,906 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 165 transitions, 389 flow [2021-12-14 16:56:18,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:18,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:18,906 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] [2021-12-14 16:56:18,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:56:19,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:19,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash -43481260, now seen corresponding path program 2 times [2021-12-14 16:56:19,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:19,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393411160] [2021-12-14 16:56:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:19,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:19,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:19,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393411160] [2021-12-14 16:56:19,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393411160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:19,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:19,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:56:19,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96123513] [2021-12-14 16:56:19,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:19,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:56:19,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:56:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:56:19,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2021-12-14 16:56:19,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 165 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:19,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:19,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2021-12-14 16:56:19,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:19,322 INFO L129 PetriNetUnfolder]: 112/796 cut-off events. [2021-12-14 16:56:19,322 INFO L130 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2021-12-14 16:56:19,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 796 events. 112/796 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4067 event pairs, 38 based on Foata normal form. 2/752 useless extension candidates. Maximal degree in co-relation 1198. Up to 157 conditions per place. [2021-12-14 16:56:19,326 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 27 selfloop transitions, 6 changer transitions 0/176 dead transitions. [2021-12-14 16:56:19,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 176 transitions, 496 flow [2021-12-14 16:56:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:56:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:56:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2021-12-14 16:56:19,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8637837837837837 [2021-12-14 16:56:19,330 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2021-12-14 16:56:19,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2021-12-14 16:56:19,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:19,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2021-12-14 16:56:19,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:19,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:19,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:19,334 INFO L186 Difference]: Start difference. First operand has 170 places, 165 transitions, 389 flow. Second operand 5 states and 799 transitions. [2021-12-14 16:56:19,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 176 transitions, 496 flow [2021-12-14 16:56:19,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 176 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:56:19,338 INFO L242 Difference]: Finished difference. Result has 176 places, 167 transitions, 424 flow [2021-12-14 16:56:19,338 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=176, PETRI_TRANSITIONS=167} [2021-12-14 16:56:19,340 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 10 predicate places. [2021-12-14 16:56:19,340 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 167 transitions, 424 flow [2021-12-14 16:56:19,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:19,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:19,341 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] [2021-12-14 16:56:19,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:56:19,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash -310544782, now seen corresponding path program 3 times [2021-12-14 16:56:19,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:19,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956272012] [2021-12-14 16:56:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:19,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:19,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956272012] [2021-12-14 16:56:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956272012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768846115] [2021-12-14 16:56:19,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:56:19,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:19,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:19,423 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:19,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:56:19,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:56:19,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 16:56:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:19,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768846115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:19,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:19,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2021-12-14 16:56:19,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638480427] [2021-12-14 16:56:19,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:19,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:56:19,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:56:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:56:19,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2021-12-14 16:56:19,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 167 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 154.125) internal successors, (1233), 8 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:19,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:19,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2021-12-14 16:56:19,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:20,038 INFO L129 PetriNetUnfolder]: 223/1428 cut-off events. [2021-12-14 16:56:20,038 INFO L130 PetriNetUnfolder]: For 646/654 co-relation queries the response was YES. [2021-12-14 16:56:20,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2378 conditions, 1428 events. 223/1428 cut-off events. For 646/654 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9407 event pairs, 67 based on Foata normal form. 8/1348 useless extension candidates. Maximal degree in co-relation 2366. Up to 312 conditions per place. [2021-12-14 16:56:20,044 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 54 selfloop transitions, 25 changer transitions 2/221 dead transitions. [2021-12-14 16:56:20,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 221 transitions, 798 flow [2021-12-14 16:56:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:56:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:56:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1431 transitions. [2021-12-14 16:56:20,047 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8594594594594595 [2021-12-14 16:56:20,047 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1431 transitions. [2021-12-14 16:56:20,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1431 transitions. [2021-12-14 16:56:20,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:20,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1431 transitions. [2021-12-14 16:56:20,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,052 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 185.0) internal successors, (1850), 10 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,052 INFO L186 Difference]: Start difference. First operand has 176 places, 167 transitions, 424 flow. Second operand 9 states and 1431 transitions. [2021-12-14 16:56:20,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 221 transitions, 798 flow [2021-12-14 16:56:20,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 221 transitions, 788 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-14 16:56:20,056 INFO L242 Difference]: Finished difference. Result has 187 places, 190 transitions, 624 flow [2021-12-14 16:56:20,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=624, PETRI_PLACES=187, PETRI_TRANSITIONS=190} [2021-12-14 16:56:20,057 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 21 predicate places. [2021-12-14 16:56:20,057 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 190 transitions, 624 flow [2021-12-14 16:56:20,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 154.125) internal successors, (1233), 8 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:20,058 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:20,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:56:20,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 16:56:20,274 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:20,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:20,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2105747322, now seen corresponding path program 4 times [2021-12-14 16:56:20,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:20,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520139777] [2021-12-14 16:56:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:20,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:20,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:20,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520139777] [2021-12-14 16:56:20,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520139777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:20,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:56:20,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773785664] [2021-12-14 16:56:20,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:20,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:56:20,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:56:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:56:20,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2021-12-14 16:56:20,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 190 transitions, 624 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:20,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2021-12-14 16:56:20,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:20,503 INFO L129 PetriNetUnfolder]: 221/1406 cut-off events. [2021-12-14 16:56:20,503 INFO L130 PetriNetUnfolder]: For 1110/1110 co-relation queries the response was YES. [2021-12-14 16:56:20,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2570 conditions, 1406 events. 221/1406 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9254 event pairs, 73 based on Foata normal form. 11/1325 useless extension candidates. Maximal degree in co-relation 2553. Up to 298 conditions per place. [2021-12-14 16:56:20,510 INFO L132 encePairwiseOnDemand]: 177/185 looper letters, 52 selfloop transitions, 20 changer transitions 2/214 dead transitions. [2021-12-14 16:56:20,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 214 transitions, 868 flow [2021-12-14 16:56:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:56:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:56:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 959 transitions. [2021-12-14 16:56:20,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8639639639639639 [2021-12-14 16:56:20,513 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 959 transitions. [2021-12-14 16:56:20,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 959 transitions. [2021-12-14 16:56:20,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:20,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 959 transitions. [2021-12-14 16:56:20,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,516 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,517 INFO L186 Difference]: Start difference. First operand has 187 places, 190 transitions, 624 flow. Second operand 6 states and 959 transitions. [2021-12-14 16:56:20,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 214 transitions, 868 flow [2021-12-14 16:56:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 214 transitions, 847 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-12-14 16:56:20,521 INFO L242 Difference]: Finished difference. Result has 194 places, 195 transitions, 712 flow [2021-12-14 16:56:20,522 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=712, PETRI_PLACES=194, PETRI_TRANSITIONS=195} [2021-12-14 16:56:20,522 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 28 predicate places. [2021-12-14 16:56:20,522 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 195 transitions, 712 flow [2021-12-14 16:56:20,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,523 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:20,523 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:20,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:56:20,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash -498513026, now seen corresponding path program 1 times [2021-12-14 16:56:20,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:20,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577244430] [2021-12-14 16:56:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:20,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:20,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:20,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577244430] [2021-12-14 16:56:20,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577244430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:20,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:20,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:56:20,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912296625] [2021-12-14 16:56:20,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:56:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:56:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:56:20,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 185 [2021-12-14 16:56:20,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 195 transitions, 712 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:20,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 185 [2021-12-14 16:56:20,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:20,691 INFO L129 PetriNetUnfolder]: 120/1144 cut-off events. [2021-12-14 16:56:20,691 INFO L130 PetriNetUnfolder]: For 1000/1034 co-relation queries the response was YES. [2021-12-14 16:56:20,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 1144 events. 120/1144 cut-off events. For 1000/1034 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6846 event pairs, 23 based on Foata normal form. 23/1078 useless extension candidates. Maximal degree in co-relation 2041. Up to 168 conditions per place. [2021-12-14 16:56:20,697 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 44 selfloop transitions, 11 changer transitions 0/207 dead transitions. [2021-12-14 16:56:20,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 207 transitions, 896 flow [2021-12-14 16:56:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:56:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-14 16:56:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 658 transitions. [2021-12-14 16:56:20,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8891891891891892 [2021-12-14 16:56:20,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 658 transitions. [2021-12-14 16:56:20,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 658 transitions. [2021-12-14 16:56:20,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:20,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 658 transitions. [2021-12-14 16:56:20,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.5) internal successors, (658), 4 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,701 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,702 INFO L186 Difference]: Start difference. First operand has 194 places, 195 transitions, 712 flow. Second operand 4 states and 658 transitions. [2021-12-14 16:56:20,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 207 transitions, 896 flow [2021-12-14 16:56:20,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 207 transitions, 872 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-12-14 16:56:20,706 INFO L242 Difference]: Finished difference. Result has 195 places, 199 transitions, 767 flow [2021-12-14 16:56:20,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=767, PETRI_PLACES=195, PETRI_TRANSITIONS=199} [2021-12-14 16:56:20,707 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 29 predicate places. [2021-12-14 16:56:20,707 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 199 transitions, 767 flow [2021-12-14 16:56:20,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:20,707 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:20,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:56:20,708 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1215334782, now seen corresponding path program 2 times [2021-12-14 16:56:20,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790259521] [2021-12-14 16:56:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:20,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:20,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790259521] [2021-12-14 16:56:20,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790259521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:20,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:20,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:56:20,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358645679] [2021-12-14 16:56:20,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:20,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:56:20,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:56:20,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:56:20,749 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 185 [2021-12-14 16:56:20,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 199 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:20,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 185 [2021-12-14 16:56:20,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:20,850 INFO L129 PetriNetUnfolder]: 114/1036 cut-off events. [2021-12-14 16:56:20,851 INFO L130 PetriNetUnfolder]: For 1084/1122 co-relation queries the response was YES. [2021-12-14 16:56:20,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1926 conditions, 1036 events. 114/1036 cut-off events. For 1084/1122 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5840 event pairs, 20 based on Foata normal form. 26/983 useless extension candidates. Maximal degree in co-relation 1905. Up to 134 conditions per place. [2021-12-14 16:56:20,857 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 41 selfloop transitions, 16 changer transitions 1/210 dead transitions. [2021-12-14 16:56:20,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 210 transitions, 941 flow [2021-12-14 16:56:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:56:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:56:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2021-12-14 16:56:20,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8821621621621621 [2021-12-14 16:56:20,859 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2021-12-14 16:56:20,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2021-12-14 16:56:20,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:20,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2021-12-14 16:56:20,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,863 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,863 INFO L186 Difference]: Start difference. First operand has 195 places, 199 transitions, 767 flow. Second operand 5 states and 816 transitions. [2021-12-14 16:56:20,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 210 transitions, 941 flow [2021-12-14 16:56:20,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 210 transitions, 933 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-12-14 16:56:20,868 INFO L242 Difference]: Finished difference. Result has 200 places, 201 transitions, 830 flow [2021-12-14 16:56:20,868 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=830, PETRI_PLACES=200, PETRI_TRANSITIONS=201} [2021-12-14 16:56:20,868 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 34 predicate places. [2021-12-14 16:56:20,869 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 201 transitions, 830 flow [2021-12-14 16:56:20,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:20,869 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:20,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:56:20,870 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2094419690, now seen corresponding path program 3 times [2021-12-14 16:56:20,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:20,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19694152] [2021-12-14 16:56:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:20,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:20,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19694152] [2021-12-14 16:56:20,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19694152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:56:20,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:56:20,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:56:20,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786462362] [2021-12-14 16:56:20,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:56:20,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:56:20,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:20,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:56:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:56:20,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 185 [2021-12-14 16:56:20,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 201 transitions, 830 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:20,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:20,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 185 [2021-12-14 16:56:20,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:21,029 INFO L129 PetriNetUnfolder]: 110/971 cut-off events. [2021-12-14 16:56:21,030 INFO L130 PetriNetUnfolder]: For 1234/1279 co-relation queries the response was YES. [2021-12-14 16:56:21,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 971 events. 110/971 cut-off events. For 1234/1279 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5349 event pairs, 13 based on Foata normal form. 25/923 useless extension candidates. Maximal degree in co-relation 1893. Up to 135 conditions per place. [2021-12-14 16:56:21,036 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 37 selfloop transitions, 20 changer transitions 2/211 dead transitions. [2021-12-14 16:56:21,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 211 transitions, 1007 flow [2021-12-14 16:56:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:56:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-14 16:56:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 659 transitions. [2021-12-14 16:56:21,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8905405405405405 [2021-12-14 16:56:21,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 659 transitions. [2021-12-14 16:56:21,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 659 transitions. [2021-12-14 16:56:21,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:21,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 659 transitions. [2021-12-14 16:56:21,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,041 INFO L186 Difference]: Start difference. First operand has 200 places, 201 transitions, 830 flow. Second operand 4 states and 659 transitions. [2021-12-14 16:56:21,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 211 transitions, 1007 flow [2021-12-14 16:56:21,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 211 transitions, 978 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-12-14 16:56:21,047 INFO L242 Difference]: Finished difference. Result has 202 places, 202 transitions, 863 flow [2021-12-14 16:56:21,047 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=863, PETRI_PLACES=202, PETRI_TRANSITIONS=202} [2021-12-14 16:56:21,047 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 36 predicate places. [2021-12-14 16:56:21,047 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 202 transitions, 863 flow [2021-12-14 16:56:21,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:21,048 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:21,048 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:21,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:56:21,048 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash 397219919, now seen corresponding path program 1 times [2021-12-14 16:56:21,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:21,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227807288] [2021-12-14 16:56:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:21,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:21,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227807288] [2021-12-14 16:56:21,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227807288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516921575] [2021-12-14 16:56:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:21,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:21,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:21,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:56:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 16:56:21,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:21,912 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-14 16:56:21,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-14 16:56:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:22,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:22,398 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-14 16:56:22,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-14 16:56:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:56:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516921575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:23,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:23,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2021-12-14 16:56:23,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884100297] [2021-12-14 16:56:23,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:23,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:56:23,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:56:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:56:23,080 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2021-12-14 16:56:23,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 202 transitions, 863 flow. Second operand has 36 states, 36 states have (on average 89.83333333333333) internal successors, (3234), 36 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:23,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:23,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2021-12-14 16:56:23,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:56:38,671 INFO L129 PetriNetUnfolder]: 10289/22583 cut-off events. [2021-12-14 16:56:38,672 INFO L130 PetriNetUnfolder]: For 27772/27998 co-relation queries the response was YES. [2021-12-14 16:56:38,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53494 conditions, 22583 events. 10289/22583 cut-off events. For 27772/27998 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 204008 event pairs, 352 based on Foata normal form. 471/21829 useless extension candidates. Maximal degree in co-relation 53470. Up to 3475 conditions per place. [2021-12-14 16:56:38,828 INFO L132 encePairwiseOnDemand]: 136/185 looper letters, 742 selfloop transitions, 281 changer transitions 548/1650 dead transitions. [2021-12-14 16:56:38,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1650 transitions, 9220 flow [2021-12-14 16:56:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-14 16:56:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-12-14 16:56:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 15820 transitions. [2021-12-14 16:56:38,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5000790263948158 [2021-12-14 16:56:38,914 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 15820 transitions. [2021-12-14 16:56:38,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 15820 transitions. [2021-12-14 16:56:38,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:56:38,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 15820 transitions. [2021-12-14 16:56:38,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 172 states, 171 states have (on average 92.51461988304094) internal successors, (15820), 171 states have internal predecessors, (15820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 172 states, 172 states have (on average 185.0) internal successors, (31820), 172 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,019 INFO L81 ComplementDD]: Finished complementDD. Result has 172 states, 172 states have (on average 185.0) internal successors, (31820), 172 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,019 INFO L186 Difference]: Start difference. First operand has 202 places, 202 transitions, 863 flow. Second operand 171 states and 15820 transitions. [2021-12-14 16:56:39,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1650 transitions, 9220 flow [2021-12-14 16:56:39,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1650 transitions, 9042 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-12-14 16:56:39,061 INFO L242 Difference]: Finished difference. Result has 486 places, 447 transitions, 3501 flow [2021-12-14 16:56:39,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=3501, PETRI_PLACES=486, PETRI_TRANSITIONS=447} [2021-12-14 16:56:39,062 INFO L334 CegarLoopForPetriNet]: 166 programPoint places, 320 predicate places. [2021-12-14 16:56:39,063 INFO L470 AbstractCegarLoop]: Abstraction has has 486 places, 447 transitions, 3501 flow [2021-12-14 16:56:39,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 89.83333333333333) internal successors, (3234), 36 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:39,064 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:56:39,064 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:56:39,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 16:56:39,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:39,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:56:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:56:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash -286841934, now seen corresponding path program 2 times [2021-12-14 16:56:39,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:56:39,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587956942] [2021-12-14 16:56:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:56:39,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:56:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:56:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:56:40,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:56:40,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587956942] [2021-12-14 16:56:40,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587956942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:56:40,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436545732] [2021-12-14 16:56:40,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:56:40,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:56:40,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:56:40,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:56:40,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:56:40,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:56:40,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:56:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-14 16:56:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:56:40,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:56:40,527 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 16:56:40,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-14 16:56:40,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 16:56:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:56:41,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:56:42,055 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-14 16:56:42,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-14 16:56:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:56:42,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:56:45,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:56:45,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2021-12-14 16:56:45,692 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-14 16:56:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2021-12-14 16:56:45,718 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-14 16:56:45,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2021-12-14 16:56:45,724 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-14 16:56:45,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2021-12-14 16:56:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:56:46,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436545732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:56:46,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:56:46,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29, 27] total 68 [2021-12-14 16:56:46,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155726065] [2021-12-14 16:56:46,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:56:46,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-14 16:56:46,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:56:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-14 16:56:46,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=4057, Unknown=130, NotChecked=0, Total=4556 [2021-12-14 16:56:46,213 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 185 [2021-12-14 16:56:46,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 447 transitions, 3501 flow. Second operand has 68 states, 68 states have (on average 57.4264705882353) internal successors, (3905), 68 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:56:46,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:56:46,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 185 [2021-12-14 16:56:46,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand