./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-min-array-hom.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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:03:04,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:03:04,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:03:04,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:03:04,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:03:04,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:03:04,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:03:04,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:03:04,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:03:04,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:03:04,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:03:04,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:03:04,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:03:04,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:03:04,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:03:04,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:03:04,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:03:04,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:03:04,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:03:04,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:03:04,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:03:04,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:03:04,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:03:04,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:03:04,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:03:04,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:03:04,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:03:04,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:03:04,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:03:04,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:03:04,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:03:04,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:03:04,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:03:04,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:03:04,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:03:04,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:03:04,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:03:04,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:03:04,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:03:04,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:03:04,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:03:04,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:03:04,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:03:04,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:03:04,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:03:04,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:03:04,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:03:04,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:03:04,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:03:04,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:03:04,543 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:03:04,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:03:04,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:03:04,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:03:04,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:03:04,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:03:04,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:03:04,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:03:04,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:03:04,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:03:04,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:03:04,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:03:04,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:03:04,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:03:04,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:03:04,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:03:04,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:03:04,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:03:04,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:03:04,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:03:04,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:03:04,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:03:04,546 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:03:04,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:03:04,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:03:04,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:03:04,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2021-12-17 23:03:04,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:03:04,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:03:04,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:03:04,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:03:04,767 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:03:04,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2021-12-17 23:03:04,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3268559f/5c736f1fbcd74edca7a9765b0751ce39/FLAG893b832cb [2021-12-17 23:03:05,189 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:03:05,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2021-12-17 23:03:05,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3268559f/5c736f1fbcd74edca7a9765b0751ce39/FLAG893b832cb [2021-12-17 23:03:05,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3268559f/5c736f1fbcd74edca7a9765b0751ce39 [2021-12-17 23:03:05,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:03:05,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:03:05,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:03:05,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:03:05,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:03:05,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71530e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05, skipping insertion in model container [2021-12-17 23:03:05,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:03:05,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:03:05,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2021-12-17 23:03:05,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:03:05,441 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:03:05,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2021-12-17 23:03:05,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:03:05,469 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:03:05,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05 WrapperNode [2021-12-17 23:03:05,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:03:05,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:03:05,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:03:05,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:03:05,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,498 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2021-12-17 23:03:05,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:03:05,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:03:05,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:03:05,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:03:05,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:03:05,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:03:05,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:03:05,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:03:05,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (1/1) ... [2021-12-17 23:03:05,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:03:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:05,575 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) [2021-12-17 23:03:05,582 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 [2021-12-17 23:03:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:03:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:03:05,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:03:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:03:05,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:03:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-17 23:03:05,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-17 23:03:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:03:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:03:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:03:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:03:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:03:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:03:05,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:03:05,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:03:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:03:05,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:03:05,604 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:03:05,678 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:03:05,680 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:03:05,901 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:03:05,946 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:03:05,946 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 23:03:05,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:03:05 BoogieIcfgContainer [2021-12-17 23:03:05,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:03:05,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:03:05,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:03:05,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:03:05,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:03:05" (1/3) ... [2021-12-17 23:03:05,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ae26cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:03:05, skipping insertion in model container [2021-12-17 23:03:05,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:03:05" (2/3) ... [2021-12-17 23:03:05,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ae26cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:03:05, skipping insertion in model container [2021-12-17 23:03:05,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:03:05" (3/3) ... [2021-12-17 23:03:05,959 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2021-12-17 23:03:05,962 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:03:05,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:03:05,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:03:05,963 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:03:05,993 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:05,993 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:05,994 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,009 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,009 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,009 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,009 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,010 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,010 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,011 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,011 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,011 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,011 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,011 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,012 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,012 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,012 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,012 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,012 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,013 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,013 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,013 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,013 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,013 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,014 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,014 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,014 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,014 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,015 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,015 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,015 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,015 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,016 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,016 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,016 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,016 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,021 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,021 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,021 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,021 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,022 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,022 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,022 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,022 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,022 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,023 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,023 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,023 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,024 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,024 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,024 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,025 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,025 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,025 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,026 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,026 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,027 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,027 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,027 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,028 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,030 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,030 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,030 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,031 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,034 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,035 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,035 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,038 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,038 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,038 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,039 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,039 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,040 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:03:06,042 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-17 23:03:06,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:03:06,097 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 [2021-12-17 23:03:06,097 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 23:03:06,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 342 flow [2021-12-17 23:03:06,177 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2021-12-17 23:03:06,178 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:03:06,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 13/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2021-12-17 23:03:06,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 342 flow [2021-12-17 23:03:06,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 145 transitions, 308 flow [2021-12-17 23:03:06,231 INFO L129 PetriNetUnfolder]: 13/144 cut-off events. [2021-12-17 23:03:06,232 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:03:06,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:06,233 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] [2021-12-17 23:03:06,234 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash -363023648, now seen corresponding path program 1 times [2021-12-17 23:03:06,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:06,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117578284] [2021-12-17 23:03:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:06,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:06,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:06,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117578284] [2021-12-17 23:03:06,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117578284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:03:06,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:03:06,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:03:06,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069446654] [2021-12-17 23:03:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:06,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:03:06,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:06,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:03:06,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:03:06,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 159 [2021-12-17 23:03:06,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 145 transitions, 308 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:06,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 159 [2021-12-17 23:03:06,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:06,562 INFO L129 PetriNetUnfolder]: 42/270 cut-off events. [2021-12-17 23:03:06,562 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2021-12-17 23:03:06,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 270 events. 42/270 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 719 event pairs, 15 based on Foata normal form. 42/281 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2021-12-17 23:03:06,566 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 9 selfloop transitions, 0 changer transitions 4/137 dead transitions. [2021-12-17 23:03:06,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 310 flow [2021-12-17 23:03:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:03:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 23:03:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2021-12-17 23:03:06,575 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.940251572327044 [2021-12-17 23:03:06,575 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2021-12-17 23:03:06,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2021-12-17 23:03:06,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:06,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2021-12-17 23:03:06,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,600 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,601 INFO L186 Difference]: Start difference. First operand has 142 places, 145 transitions, 308 flow. Second operand 2 states and 299 transitions. [2021-12-17 23:03:06,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 310 flow [2021-12-17 23:03:06,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 137 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-17 23:03:06,606 INFO L242 Difference]: Finished difference. Result has 137 places, 133 transitions, 272 flow [2021-12-17 23:03:06,607 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=272, PETRI_PLACES=137, PETRI_TRANSITIONS=133} [2021-12-17 23:03:06,610 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2021-12-17 23:03:06,610 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 133 transitions, 272 flow [2021-12-17 23:03:06,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,610 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:06,611 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] [2021-12-17 23:03:06,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:03:06,611 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash 811959335, now seen corresponding path program 1 times [2021-12-17 23:03:06,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:06,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901681134] [2021-12-17 23:03:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:06,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:06,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901681134] [2021-12-17 23:03:06,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901681134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:03:06,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:03:06,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 23:03:06,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701589877] [2021-12-17 23:03:06,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:06,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:03:06,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:06,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:03:06,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:03:06,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 159 [2021-12-17 23:03:06,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 133 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:06,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 159 [2021-12-17 23:03:06,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:06,969 INFO L129 PetriNetUnfolder]: 50/349 cut-off events. [2021-12-17 23:03:06,969 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-12-17 23:03:06,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 349 events. 50/349 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1157 event pairs, 4 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 478. Up to 51 conditions per place. [2021-12-17 23:03:06,972 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 59 selfloop transitions, 5 changer transitions 5/169 dead transitions. [2021-12-17 23:03:06,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 169 transitions, 491 flow [2021-12-17 23:03:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:03:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:03:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 861 transitions. [2021-12-17 23:03:06,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7735849056603774 [2021-12-17 23:03:06,978 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 861 transitions. [2021-12-17 23:03:06,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 861 transitions. [2021-12-17 23:03:06,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:06,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 861 transitions. [2021-12-17 23:03:06,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,988 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,988 INFO L186 Difference]: Start difference. First operand has 137 places, 133 transitions, 272 flow. Second operand 7 states and 861 transitions. [2021-12-17 23:03:06,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 169 transitions, 491 flow [2021-12-17 23:03:06,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 169 transitions, 491 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:03:06,994 INFO L242 Difference]: Finished difference. Result has 143 places, 136 transitions, 303 flow [2021-12-17 23:03:06,994 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=143, PETRI_TRANSITIONS=136} [2021-12-17 23:03:06,995 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 1 predicate places. [2021-12-17 23:03:06,997 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 136 transitions, 303 flow [2021-12-17 23:03:06,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:06,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:06,998 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] [2021-12-17 23:03:06,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:03:06,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash 413321701, now seen corresponding path program 1 times [2021-12-17 23:03:06,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:06,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911178856] [2021-12-17 23:03:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:06,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:07,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911178856] [2021-12-17 23:03:07,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911178856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:03:07,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:03:07,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:03:07,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767806439] [2021-12-17 23:03:07,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:07,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:03:07,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:03:07,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:03:07,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 159 [2021-12-17 23:03:07,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 136 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:07,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 159 [2021-12-17 23:03:07,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:07,180 INFO L129 PetriNetUnfolder]: 57/392 cut-off events. [2021-12-17 23:03:07,181 INFO L130 PetriNetUnfolder]: For 56/57 co-relation queries the response was YES. [2021-12-17 23:03:07,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 392 events. 57/392 cut-off events. For 56/57 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1413 event pairs, 6 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 570. Up to 59 conditions per place. [2021-12-17 23:03:07,183 INFO L132 encePairwiseOnDemand]: 154/159 looper letters, 32 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2021-12-17 23:03:07,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 157 transitions, 448 flow [2021-12-17 23:03:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:03:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 23:03:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2021-12-17 23:03:07,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9040880503144654 [2021-12-17 23:03:07,185 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2021-12-17 23:03:07,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2021-12-17 23:03:07,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:07,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2021-12-17 23:03:07,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,188 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,188 INFO L186 Difference]: Start difference. First operand has 143 places, 136 transitions, 303 flow. Second operand 4 states and 575 transitions. [2021-12-17 23:03:07,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 157 transitions, 448 flow [2021-12-17 23:03:07,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 157 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-12-17 23:03:07,194 INFO L242 Difference]: Finished difference. Result has 141 places, 140 transitions, 336 flow [2021-12-17 23:03:07,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=141, PETRI_TRANSITIONS=140} [2021-12-17 23:03:07,196 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, -1 predicate places. [2021-12-17 23:03:07,196 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 140 transitions, 336 flow [2021-12-17 23:03:07,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,196 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:07,196 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] [2021-12-17 23:03:07,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:03:07,197 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1166406698, now seen corresponding path program 1 times [2021-12-17 23:03:07,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:07,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709012930] [2021-12-17 23:03:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:07,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:07,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:07,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709012930] [2021-12-17 23:03:07,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709012930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:03:07,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:03:07,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 23:03:07,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337736412] [2021-12-17 23:03:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:07,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:03:07,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:03:07,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:03:07,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2021-12-17 23:03:07,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:07,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2021-12-17 23:03:07,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:07,516 INFO L129 PetriNetUnfolder]: 402/1388 cut-off events. [2021-12-17 23:03:07,516 INFO L130 PetriNetUnfolder]: For 598/598 co-relation queries the response was YES. [2021-12-17 23:03:07,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 1388 events. 402/1388 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8997 event pairs, 159 based on Foata normal form. 0/1194 useless extension candidates. Maximal degree in co-relation 2656. Up to 473 conditions per place. [2021-12-17 23:03:07,524 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 60 selfloop transitions, 8 changer transitions 0/170 dead transitions. [2021-12-17 23:03:07,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 170 transitions, 580 flow [2021-12-17 23:03:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:03:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:03:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1008 transitions. [2021-12-17 23:03:07,526 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7924528301886793 [2021-12-17 23:03:07,527 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1008 transitions. [2021-12-17 23:03:07,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1008 transitions. [2021-12-17 23:03:07,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:07,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1008 transitions. [2021-12-17 23:03:07,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 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) [2021-12-17 23:03:07,531 INFO L81 ComplementDD]: Finished complementDD. Result has 9 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) [2021-12-17 23:03:07,531 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 336 flow. Second operand 8 states and 1008 transitions. [2021-12-17 23:03:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 170 transitions, 580 flow [2021-12-17 23:03:07,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 170 transitions, 580 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:03:07,534 INFO L242 Difference]: Finished difference. Result has 151 places, 143 transitions, 372 flow [2021-12-17 23:03:07,535 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=372, PETRI_PLACES=151, PETRI_TRANSITIONS=143} [2021-12-17 23:03:07,535 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 9 predicate places. [2021-12-17 23:03:07,535 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 143 transitions, 372 flow [2021-12-17 23:03:07,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,536 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:07,536 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] [2021-12-17 23:03:07,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:03:07,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:07,537 INFO L85 PathProgramCache]: Analyzing trace with hash 804051908, now seen corresponding path program 1 times [2021-12-17 23:03:07,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:07,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719495800] [2021-12-17 23:03:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:07,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:07,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:07,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719495800] [2021-12-17 23:03:07,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719495800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:03:07,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:03:07,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 23:03:07,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949955877] [2021-12-17 23:03:07,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:07,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 23:03:07,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 23:03:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:03:07,643 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 159 [2021-12-17 23:03:07,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 143 transitions, 372 flow. Second operand has 10 states, 10 states have (on average 101.1) internal successors, (1011), 10 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:07,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:07,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 159 [2021-12-17 23:03:07,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:08,031 INFO L129 PetriNetUnfolder]: 1091/2485 cut-off events. [2021-12-17 23:03:08,032 INFO L130 PetriNetUnfolder]: For 670/694 co-relation queries the response was YES. [2021-12-17 23:03:08,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5035 conditions, 2485 events. 1091/2485 cut-off events. For 670/694 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17699 event pairs, 801 based on Foata normal form. 24/2211 useless extension candidates. Maximal degree in co-relation 5024. Up to 1499 conditions per place. [2021-12-17 23:03:08,044 INFO L132 encePairwiseOnDemand]: 147/159 looper letters, 80 selfloop transitions, 11 changer transitions 0/176 dead transitions. [2021-12-17 23:03:08,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 176 transitions, 638 flow [2021-12-17 23:03:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 23:03:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 23:03:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1150 transitions. [2021-12-17 23:03:08,047 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.657518582046884 [2021-12-17 23:03:08,047 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1150 transitions. [2021-12-17 23:03:08,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1150 transitions. [2021-12-17 23:03:08,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:08,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1150 transitions. [2021-12-17 23:03:08,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 104.54545454545455) internal successors, (1150), 11 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,052 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,052 INFO L186 Difference]: Start difference. First operand has 151 places, 143 transitions, 372 flow. Second operand 11 states and 1150 transitions. [2021-12-17 23:03:08,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 176 transitions, 638 flow [2021-12-17 23:03:08,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 176 transitions, 628 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:03:08,056 INFO L242 Difference]: Finished difference. Result has 162 places, 147 transitions, 411 flow [2021-12-17 23:03:08,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=162, PETRI_TRANSITIONS=147} [2021-12-17 23:03:08,057 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 20 predicate places. [2021-12-17 23:03:08,057 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 147 transitions, 411 flow [2021-12-17 23:03:08,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.1) internal successors, (1011), 10 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:08,058 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] [2021-12-17 23:03:08,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:03:08,058 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:08,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1872440416, now seen corresponding path program 1 times [2021-12-17 23:03:08,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:08,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321057239] [2021-12-17 23:03:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:08,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:08,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321057239] [2021-12-17 23:03:08,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321057239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:03:08,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:03:08,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 23:03:08,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118259684] [2021-12-17 23:03:08,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:08,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 23:03:08,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 23:03:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 23:03:08,184 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 159 [2021-12-17 23:03:08,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 147 transitions, 411 flow. Second operand has 10 states, 10 states have (on average 102.0) internal successors, (1020), 10 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:08,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 159 [2021-12-17 23:03:08,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:08,577 INFO L129 PetriNetUnfolder]: 906/1938 cut-off events. [2021-12-17 23:03:08,577 INFO L130 PetriNetUnfolder]: For 864/882 co-relation queries the response was YES. [2021-12-17 23:03:08,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4319 conditions, 1938 events. 906/1938 cut-off events. For 864/882 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12726 event pairs, 534 based on Foata normal form. 18/1813 useless extension candidates. Maximal degree in co-relation 4303. Up to 1103 conditions per place. [2021-12-17 23:03:08,589 INFO L132 encePairwiseOnDemand]: 146/159 looper letters, 66 selfloop transitions, 7 changer transitions 21/179 dead transitions. [2021-12-17 23:03:08,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 179 transitions, 704 flow [2021-12-17 23:03:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:03:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 23:03:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1256 transitions. [2021-12-17 23:03:08,592 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582809224318659 [2021-12-17 23:03:08,592 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1256 transitions. [2021-12-17 23:03:08,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1256 transitions. [2021-12-17 23:03:08,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:08,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1256 transitions. [2021-12-17 23:03:08,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.66666666666667) internal successors, (1256), 12 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 159.0) internal successors, (2067), 13 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,596 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 159.0) internal successors, (2067), 13 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,596 INFO L186 Difference]: Start difference. First operand has 162 places, 147 transitions, 411 flow. Second operand 12 states and 1256 transitions. [2021-12-17 23:03:08,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 179 transitions, 704 flow [2021-12-17 23:03:08,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 179 transitions, 691 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 23:03:08,600 INFO L242 Difference]: Finished difference. Result has 170 places, 141 transitions, 378 flow [2021-12-17 23:03:08,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=170, PETRI_TRANSITIONS=141} [2021-12-17 23:03:08,600 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 28 predicate places. [2021-12-17 23:03:08,601 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 141 transitions, 378 flow [2021-12-17 23:03:08,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 102.0) internal successors, (1020), 10 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:08,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:08,601 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] [2021-12-17 23:03:08,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:03:08,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1649235809, now seen corresponding path program 1 times [2021-12-17 23:03:08,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:08,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740833093] [2021-12-17 23:03:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:08,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:08,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:08,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740833093] [2021-12-17 23:03:08,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740833093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:08,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625975028] [2021-12-17 23:03:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:08,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:08,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:08,704 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) [2021-12-17 23:03:08,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:03:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:08,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:03:08,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:03:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:09,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:03:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:09,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625975028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:03:09,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:03:09,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2021-12-17 23:03:09,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447236814] [2021-12-17 23:03:09,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:03:09,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:03:09,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:09,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:03:09,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-17 23:03:09,495 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 159 [2021-12-17 23:03:09,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 141 transitions, 378 flow. Second operand has 18 states, 18 states have (on average 114.94444444444444) internal successors, (2069), 18 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:09,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:09,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 159 [2021-12-17 23:03:09,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:09,983 INFO L129 PetriNetUnfolder]: 1559/2810 cut-off events. [2021-12-17 23:03:09,983 INFO L130 PetriNetUnfolder]: For 1351/1351 co-relation queries the response was YES. [2021-12-17 23:03:09,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6849 conditions, 2810 events. 1559/2810 cut-off events. For 1351/1351 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18754 event pairs, 342 based on Foata normal form. 10/2782 useless extension candidates. Maximal degree in co-relation 6831. Up to 688 conditions per place. [2021-12-17 23:03:09,999 INFO L132 encePairwiseOnDemand]: 147/159 looper letters, 106 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2021-12-17 23:03:09,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 220 transitions, 906 flow [2021-12-17 23:03:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 23:03:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 23:03:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1562 transitions. [2021-12-17 23:03:10,002 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7556845670053217 [2021-12-17 23:03:10,002 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1562 transitions. [2021-12-17 23:03:10,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1562 transitions. [2021-12-17 23:03:10,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:10,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1562 transitions. [2021-12-17 23:03:10,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 120.15384615384616) internal successors, (1562), 13 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:10,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:10,007 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:10,007 INFO L186 Difference]: Start difference. First operand has 170 places, 141 transitions, 378 flow. Second operand 13 states and 1562 transitions. [2021-12-17 23:03:10,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 220 transitions, 906 flow [2021-12-17 23:03:10,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 843 flow, removed 24 selfloop flow, removed 14 redundant places. [2021-12-17 23:03:10,014 INFO L242 Difference]: Finished difference. Result has 161 places, 154 transitions, 446 flow [2021-12-17 23:03:10,014 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=446, PETRI_PLACES=161, PETRI_TRANSITIONS=154} [2021-12-17 23:03:10,015 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 19 predicate places. [2021-12-17 23:03:10,015 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 154 transitions, 446 flow [2021-12-17 23:03:10,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.94444444444444) internal successors, (2069), 18 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:10,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:10,016 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:03:10,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 23:03:10,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:10,247 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1817451035, now seen corresponding path program 2 times [2021-12-17 23:03:10,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:10,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192269180] [2021-12-17 23:03:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:10,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:03:10,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192269180] [2021-12-17 23:03:10,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192269180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762848596] [2021-12-17 23:03:10,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:03:10,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:10,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:10,332 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) [2021-12-17 23:03:10,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:03:10,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 23:03:10,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:03:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 23:03:10,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:03:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:03:10,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:03:10,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762848596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:03:10,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:03:10,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-12-17 23:03:10,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219163446] [2021-12-17 23:03:10,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:10,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:03:10,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:03:10,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:03:10,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 159 [2021-12-17 23:03:10,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 154 transitions, 446 flow. Second operand has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:10,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:10,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 159 [2021-12-17 23:03:10,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:10,996 INFO L129 PetriNetUnfolder]: 1093/2256 cut-off events. [2021-12-17 23:03:10,996 INFO L130 PetriNetUnfolder]: For 1339/1376 co-relation queries the response was YES. [2021-12-17 23:03:11,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5651 conditions, 2256 events. 1093/2256 cut-off events. For 1339/1376 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15454 event pairs, 302 based on Foata normal form. 97/2168 useless extension candidates. Maximal degree in co-relation 5637. Up to 1006 conditions per place. [2021-12-17 23:03:11,010 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 59 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2021-12-17 23:03:11,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 172 transitions, 678 flow [2021-12-17 23:03:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:03:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:03:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2021-12-17 23:03:11,013 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7114779874213837 [2021-12-17 23:03:11,013 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2021-12-17 23:03:11,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2021-12-17 23:03:11,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:11,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2021-12-17 23:03:11,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:11,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 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) [2021-12-17 23:03:11,016 INFO L81 ComplementDD]: Finished complementDD. Result has 9 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) [2021-12-17 23:03:11,017 INFO L186 Difference]: Start difference. First operand has 161 places, 154 transitions, 446 flow. Second operand 8 states and 905 transitions. [2021-12-17 23:03:11,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 172 transitions, 678 flow [2021-12-17 23:03:11,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 172 transitions, 669 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-12-17 23:03:11,021 INFO L242 Difference]: Finished difference. Result has 166 places, 157 transitions, 508 flow [2021-12-17 23:03:11,021 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=508, PETRI_PLACES=166, PETRI_TRANSITIONS=157} [2021-12-17 23:03:11,023 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 24 predicate places. [2021-12-17 23:03:11,023 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 157 transitions, 508 flow [2021-12-17 23:03:11,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:11,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:11,024 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] [2021-12-17 23:03:11,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 23:03:11,240 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,SelfDestructingSolverStorable7 [2021-12-17 23:03:11,241 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1536114403, now seen corresponding path program 1 times [2021-12-17 23:03:11,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600498140] [2021-12-17 23:03:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:11,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:03:11,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:11,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600498140] [2021-12-17 23:03:11,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600498140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:11,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526754298] [2021-12-17 23:03:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:11,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:11,306 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) [2021-12-17 23:03:11,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:03:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:11,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:03:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:03:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:03:11,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:03:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:03:11,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526754298] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:11,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:03:11,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-12-17 23:03:11,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604431286] [2021-12-17 23:03:11,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:03:11,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:03:11,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:03:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:03:11,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2021-12-17 23:03:11,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 157 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:11,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:11,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2021-12-17 23:03:11,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:11,991 INFO L129 PetriNetUnfolder]: 467/1169 cut-off events. [2021-12-17 23:03:11,991 INFO L130 PetriNetUnfolder]: For 1467/1626 co-relation queries the response was YES. [2021-12-17 23:03:11,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3157 conditions, 1169 events. 467/1169 cut-off events. For 1467/1626 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6870 event pairs, 115 based on Foata normal form. 82/1160 useless extension candidates. Maximal degree in co-relation 3141. Up to 393 conditions per place. [2021-12-17 23:03:11,999 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 57 selfloop transitions, 7 changer transitions 0/175 dead transitions. [2021-12-17 23:03:12,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 175 transitions, 746 flow [2021-12-17 23:03:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:03:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:03:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2021-12-17 23:03:12,002 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.784366576819407 [2021-12-17 23:03:12,002 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2021-12-17 23:03:12,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2021-12-17 23:03:12,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:12,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2021-12-17 23:03:12,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:12,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:12,006 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:12,006 INFO L186 Difference]: Start difference. First operand has 166 places, 157 transitions, 508 flow. Second operand 7 states and 873 transitions. [2021-12-17 23:03:12,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 175 transitions, 746 flow [2021-12-17 23:03:12,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 175 transitions, 719 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-12-17 23:03:12,013 INFO L242 Difference]: Finished difference. Result has 168 places, 158 transitions, 513 flow [2021-12-17 23:03:12,013 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=160, 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=7, PETRI_FLOW=513, PETRI_PLACES=168, PETRI_TRANSITIONS=158} [2021-12-17 23:03:12,014 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 26 predicate places. [2021-12-17 23:03:12,014 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 158 transitions, 513 flow [2021-12-17 23:03:12,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:12,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:12,015 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] [2021-12-17 23:03:12,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:03:12,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:12,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:12,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1567445740, now seen corresponding path program 1 times [2021-12-17 23:03:12,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:12,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249734070] [2021-12-17 23:03:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:12,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:12,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249734070] [2021-12-17 23:03:12,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249734070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160912695] [2021-12-17 23:03:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:12,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:12,978 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) [2021-12-17 23:03:13,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:03:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 23:03:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:03:13,847 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 15 treesize of output 11 [2021-12-17 23:03:14,517 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 [2021-12-17 23:03:14,656 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 [2021-12-17 23:03:14,752 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 [2021-12-17 23:03:15,153 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-17 23:03:15,154 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 67 treesize of output 34 [2021-12-17 23:03:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:15,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:03:16,040 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_217 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_217) c_~A~0.base))) (or (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (< .cse0 c_~min2~0) (<= c_~min3~0 .cse0)) (or (< .cse0 c_~min3~0) (< c_~min3~0 c_~min2~0)))) (let ((.cse2 (select .cse1 c_~A~0.offset))) (and (or (<= c_~min1~0 .cse2) (= c_~min2~0 .cse2)) (or (< .cse2 c_~min1~0) (= c_~min2~0 c_~min1~0))))))) is different from false [2021-12-17 23:03:16,440 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_217) c_~A~0.base))) (or (let ((.cse0 (select .cse1 c_~A~0.offset))) (and (or (= c_~min2~0 .cse0) (<= c_~min1~0 .cse0)) (or (< .cse0 c_~min1~0) (= c_~min2~0 c_~min1~0)))) (let ((.cse2 (select .cse1 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (< .cse2 c_~min2~0) (<= c_~min3~0 .cse2)) (or (< .cse2 c_~min3~0) (< c_~min3~0 c_~min2~0))))))) is different from false [2021-12-17 23:03:16,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (v_ArrVal_215 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (let ((.cse1 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_215) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_217) c_~A~0.base))) (or (let ((.cse0 (select .cse1 c_~A~0.offset))) (and (or (= c_~min2~0 c_~min1~0) (< .cse0 c_~min1~0)) (or (= c_~min2~0 .cse0) (<= c_~min1~0 .cse0)))) (let ((.cse2 (select .cse1 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (< .cse2 c_~min2~0) (<= c_~min3~0 .cse2)) (or (< .cse2 c_~min3~0) (< c_~min3~0 c_~min2~0))))))) is different from false [2021-12-17 23:03:17,197 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_216 (Array Int Int)) (v_ArrVal_215 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (let ((.cse1 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_215) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_217) c_~A~0.base))) (or (let ((.cse0 (select .cse1 c_~A~0.offset))) (and (or (= c_~min2~0 c_~min1~0) (< .cse0 c_~min1~0)) (or (= c_~min2~0 .cse0) (<= c_~min1~0 .cse0)))) (let ((.cse2 (select .cse1 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (< .cse2 c_~min2~0) (<= c_~min3~0 .cse2)) (or (< .cse2 c_~min3~0) (< c_~min3~0 c_~min2~0))))))) (= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|)) is different from false [2021-12-17 23:03:17,289 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_216 (Array Int Int)) (v_ArrVal_215 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (let ((.cse1 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_215) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_217) c_~A~0.base))) (or (let ((.cse0 (select .cse1 c_~A~0.offset))) (and (or (= c_~min2~0 c_~min1~0) (< .cse0 c_~min1~0)) (or (= c_~min2~0 .cse0) (<= c_~min1~0 .cse0)))) (let ((.cse2 (select .cse1 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (< .cse2 c_~min2~0) (<= c_~min3~0 .cse2)) (or (< .cse2 c_~min3~0) (< c_~min3~0 c_~min2~0))))))) (= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|)) is different from false [2021-12-17 23:03:23,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:23,808 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 193 treesize of output 133 [2021-12-17 23:03:23,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:23,826 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 3259 treesize of output 3127 [2021-12-17 23:03:23,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:23,873 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 3115 treesize of output 2935 [2021-12-17 23:03:23,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:23,906 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 2923 treesize of output 2551 [2021-12-17 23:03:23,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:23,937 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 2539 treesize of output 2455 [2021-12-17 23:03:23,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:03:23,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:03:23,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-12-17 23:03:23,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160061432] [2021-12-17 23:03:23,966 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:03:23,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 23:03:23,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 23:03:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=3704, Unknown=43, NotChecked=670, Total=5112 [2021-12-17 23:03:23,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 159 [2021-12-17 23:03:23,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 158 transitions, 513 flow. Second operand has 30 states, 30 states have (on average 74.36666666666666) internal successors, (2231), 30 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:23,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:23,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 159 [2021-12-17 23:03:23,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:26,038 INFO L129 PetriNetUnfolder]: 3357/6675 cut-off events. [2021-12-17 23:03:26,038 INFO L130 PetriNetUnfolder]: For 7119/7152 co-relation queries the response was YES. [2021-12-17 23:03:26,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18776 conditions, 6675 events. 3357/6675 cut-off events. For 7119/7152 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 53137 event pairs, 427 based on Foata normal form. 9/6612 useless extension candidates. Maximal degree in co-relation 18759. Up to 2063 conditions per place. [2021-12-17 23:03:26,113 INFO L132 encePairwiseOnDemand]: 126/159 looper letters, 236 selfloop transitions, 91 changer transitions 5/396 dead transitions. [2021-12-17 23:03:26,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 396 transitions, 2263 flow [2021-12-17 23:03:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 23:03:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 23:03:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2941 transitions. [2021-12-17 23:03:26,122 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4999150093489716 [2021-12-17 23:03:26,122 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2941 transitions. [2021-12-17 23:03:26,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2941 transitions. [2021-12-17 23:03:26,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:26,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2941 transitions. [2021-12-17 23:03:26,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 79.48648648648648) internal successors, (2941), 37 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:26,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 159.0) internal successors, (6042), 38 states have internal predecessors, (6042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:26,140 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 159.0) internal successors, (6042), 38 states have internal predecessors, (6042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:26,141 INFO L186 Difference]: Start difference. First operand has 168 places, 158 transitions, 513 flow. Second operand 37 states and 2941 transitions. [2021-12-17 23:03:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 396 transitions, 2263 flow [2021-12-17 23:03:26,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 396 transitions, 2227 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-17 23:03:26,162 INFO L242 Difference]: Finished difference. Result has 222 places, 235 transitions, 1350 flow [2021-12-17 23:03:26,163 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1350, PETRI_PLACES=222, PETRI_TRANSITIONS=235} [2021-12-17 23:03:26,163 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 80 predicate places. [2021-12-17 23:03:26,164 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 235 transitions, 1350 flow [2021-12-17 23:03:26,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 74.36666666666666) internal successors, (2231), 30 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:26,164 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:26,165 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] [2021-12-17 23:03:26,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:03:26,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:26,382 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash -834582708, now seen corresponding path program 2 times [2021-12-17 23:03:26,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:26,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880787424] [2021-12-17 23:03:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:26,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:27,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:27,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880787424] [2021-12-17 23:03:27,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880787424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:27,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19175616] [2021-12-17 23:03:27,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:03:27,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:27,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:27,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:03:27,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:03:27,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:03:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:03:27,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 23:03:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:03:28,200 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-17 23:03:28,200 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 67 treesize of output 34 [2021-12-17 23:03:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:03:28,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:03:28,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:28,703 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 85 treesize of output 53 [2021-12-17 23:03:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:03:29,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19175616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:03:29,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:03:29,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 18] total 52 [2021-12-17 23:03:29,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794801832] [2021-12-17 23:03:29,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:03:29,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 23:03:29,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 23:03:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2100, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 23:03:29,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2021-12-17 23:03:29,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 235 transitions, 1350 flow. Second operand has 52 states, 52 states have (on average 70.84615384615384) internal successors, (3684), 52 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:29,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:29,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2021-12-17 23:03:29,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:36,737 INFO L129 PetriNetUnfolder]: 15130/24965 cut-off events. [2021-12-17 23:03:36,737 INFO L130 PetriNetUnfolder]: For 60033/60626 co-relation queries the response was YES. [2021-12-17 23:03:36,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87052 conditions, 24965 events. 15130/24965 cut-off events. For 60033/60626 co-relation queries the response was YES. Maximal size of possible extension queue 1394. Compared 201921 event pairs, 982 based on Foata normal form. 380/25048 useless extension candidates. Maximal degree in co-relation 87013. Up to 6378 conditions per place. [2021-12-17 23:03:37,038 INFO L132 encePairwiseOnDemand]: 111/159 looper letters, 626 selfloop transitions, 454 changer transitions 17/1154 dead transitions. [2021-12-17 23:03:37,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1154 transitions, 9780 flow [2021-12-17 23:03:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-17 23:03:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-12-17 23:03:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 6673 transitions. [2021-12-17 23:03:37,046 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4715567804395449 [2021-12-17 23:03:37,046 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 6673 transitions. [2021-12-17 23:03:37,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 6673 transitions. [2021-12-17 23:03:37,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:37,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 6673 transitions. [2021-12-17 23:03:37,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 74.97752808988764) internal successors, (6673), 89 states have internal predecessors, (6673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:37,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 159.0) internal successors, (14310), 90 states have internal predecessors, (14310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:37,079 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 159.0) internal successors, (14310), 90 states have internal predecessors, (14310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:37,079 INFO L186 Difference]: Start difference. First operand has 222 places, 235 transitions, 1350 flow. Second operand 89 states and 6673 transitions. [2021-12-17 23:03:37,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1154 transitions, 9780 flow [2021-12-17 23:03:37,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1154 transitions, 9378 flow, removed 148 selfloop flow, removed 15 redundant places. [2021-12-17 23:03:37,537 INFO L242 Difference]: Finished difference. Result has 334 places, 676 transitions, 7034 flow [2021-12-17 23:03:37,537 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=7034, PETRI_PLACES=334, PETRI_TRANSITIONS=676} [2021-12-17 23:03:37,538 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 192 predicate places. [2021-12-17 23:03:37,538 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 676 transitions, 7034 flow [2021-12-17 23:03:37,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 70.84615384615384) internal successors, (3684), 52 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:37,539 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:37,539 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] [2021-12-17 23:03:37,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:03:37,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 23:03:37,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1471825560, now seen corresponding path program 1 times [2021-12-17 23:03:37,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:37,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433244101] [2021-12-17 23:03:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:37,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:03:38,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:38,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433244101] [2021-12-17 23:03:38,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433244101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440046868] [2021-12-17 23:03:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:38,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:38,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:38,195 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:03:38,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:03:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-17 23:03:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:03:39,045 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 15 treesize of output 11 [2021-12-17 23:03:39,572 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 [2021-12-17 23:03:39,712 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 [2021-12-17 23:03:39,805 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 [2021-12-17 23:03:40,067 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-17 23:03:40,067 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 59 treesize of output 30 [2021-12-17 23:03:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:40,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:03:41,461 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (or (let ((.cse0 (select .cse1 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min2~0 c_~min3~0) (= c_~min3~0 c_~min1~0) (< .cse0 c_~min3~0)) (or (<= c_~min2~0 .cse0) (<= c_~min3~0 .cse0) (= .cse0 c_~min1~0)))) (< (select .cse1 c_~A~0.offset) c_~min1~0)))) (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (let ((.cse2 (select .cse4 c_~A~0.offset))) (or (let ((.cse3 (select .cse4 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min2~0 c_~min3~0) (= c_~min3~0 .cse2) (< .cse3 c_~min3~0)) (or (<= c_~min2~0 .cse3) (= .cse3 .cse2) (<= c_~min3~0 .cse3)))) (<= c_~min1~0 .cse2)))))) is different from false [2021-12-17 23:03:41,607 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse2 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (let ((.cse0 (select .cse2 c_~A~0.offset))) (or (<= c_~min1~0 .cse0) (let ((.cse1 (select .cse2 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min2~0 c_~min3~0) (< .cse1 c_~min3~0) (= c_~min3~0 .cse0)) (or (= .cse1 .cse0) (<= c_~min3~0 .cse1) (<= c_~min2~0 .cse1)))))))) (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse4 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (or (let ((.cse3 (select .cse4 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min3~0 .cse3) (<= c_~min2~0 .cse3) (= .cse3 c_~min1~0)) (or (<= c_~min2~0 c_~min3~0) (= c_~min3~0 c_~min1~0) (< .cse3 c_~min3~0)))) (< (select .cse4 c_~A~0.offset) c_~min1~0))))) is different from false [2021-12-17 23:03:41,871 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 |c_ULTIMATE.start_assume_abort_if_not_~cond#1|) (and (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse2 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (let ((.cse0 (select .cse2 c_~A~0.offset))) (or (<= c_~min1~0 .cse0) (let ((.cse1 (select .cse2 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min2~0 c_~min3~0) (< .cse1 c_~min3~0) (= c_~min3~0 .cse0)) (or (= .cse1 .cse0) (<= c_~min3~0 .cse1) (<= c_~min2~0 .cse1)))))))) (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse4 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (or (let ((.cse3 (select .cse4 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min3~0 .cse3) (<= c_~min2~0 .cse3) (= .cse3 c_~min1~0)) (or (<= c_~min2~0 c_~min3~0) (= c_~min3~0 c_~min1~0) (< .cse3 c_~min3~0)))) (< (select .cse4 c_~A~0.offset) c_~min1~0)))))) is different from false [2021-12-17 23:03:41,971 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 |c_ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (and (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse2 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (let ((.cse0 (select .cse2 c_~A~0.offset))) (or (<= c_~min1~0 .cse0) (let ((.cse1 (select .cse2 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min2~0 c_~min3~0) (< .cse1 c_~min3~0) (= c_~min3~0 .cse0)) (or (= .cse1 .cse0) (<= c_~min3~0 .cse1) (<= c_~min2~0 .cse1)))))))) (forall ((v_ArrVal_285 (Array Int Int)) (v_ArrVal_284 (Array Int Int)) (v_ArrVal_286 (Array Int Int))) (let ((.cse4 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_285) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_286) c_~A~0.base))) (or (let ((.cse3 (select .cse4 (+ c_~A~0.offset (* c_~M~0 4))))) (and (or (<= c_~min3~0 .cse3) (<= c_~min2~0 .cse3) (= .cse3 c_~min1~0)) (or (<= c_~min2~0 c_~min3~0) (= c_~min3~0 c_~min1~0) (< .cse3 c_~min3~0)))) (< (select .cse4 c_~A~0.offset) c_~min1~0)))))) is different from false [2021-12-17 23:03:47,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:47,848 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 383 treesize of output 252 [2021-12-17 23:03:47,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:47,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 8410 treesize of output 8018 [2021-12-17 23:03:48,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:48,002 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 7973 treesize of output 7746 [2021-12-17 23:03:48,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:48,064 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 7733 treesize of output 6786 [2021-12-17 23:03:48,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:48,132 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 6773 treesize of output 6306 [2021-12-17 23:03:48,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:48,219 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 6293 treesize of output 6254 [2021-12-17 23:03:48,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:48,277 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 6241 treesize of output 6046 [2021-12-17 23:03:48,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:03:48,335 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 6033 treesize of output 5942 [2021-12-17 23:03:48,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:03:48,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:03:48,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-17 23:03:48,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201462252] [2021-12-17 23:03:48,381 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:03:48,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 23:03:48,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:03:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 23:03:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=3816, Unknown=38, NotChecked=532, Total=4970 [2021-12-17 23:03:48,384 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 159 [2021-12-17 23:03:48,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 676 transitions, 7034 flow. Second operand has 25 states, 25 states have (on average 74.72) internal successors, (1868), 25 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:48,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:03:48,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 159 [2021-12-17 23:03:48,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:03:55,127 INFO L129 PetriNetUnfolder]: 19602/31871 cut-off events. [2021-12-17 23:03:55,127 INFO L130 PetriNetUnfolder]: For 171320/171556 co-relation queries the response was YES. [2021-12-17 23:03:55,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142947 conditions, 31871 events. 19602/31871 cut-off events. For 171320/171556 co-relation queries the response was YES. Maximal size of possible extension queue 1709. Compared 262451 event pairs, 2334 based on Foata normal form. 36/31710 useless extension candidates. Maximal degree in co-relation 142871. Up to 19090 conditions per place. [2021-12-17 23:03:56,122 INFO L132 encePairwiseOnDemand]: 129/159 looper letters, 737 selfloop transitions, 280 changer transitions 5/1091 dead transitions. [2021-12-17 23:03:56,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1091 transitions, 12587 flow [2021-12-17 23:03:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 23:03:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 23:03:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2533 transitions. [2021-12-17 23:03:56,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5138973422600933 [2021-12-17 23:03:56,125 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2533 transitions. [2021-12-17 23:03:56,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2533 transitions. [2021-12-17 23:03:56,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:03:56,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2533 transitions. [2021-12-17 23:03:56,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 81.70967741935483) internal successors, (2533), 31 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:56,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 159.0) internal successors, (5088), 32 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:56,133 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 159.0) internal successors, (5088), 32 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:56,133 INFO L186 Difference]: Start difference. First operand has 334 places, 676 transitions, 7034 flow. Second operand 31 states and 2533 transitions. [2021-12-17 23:03:56,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1091 transitions, 12587 flow [2021-12-17 23:03:58,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1091 transitions, 12130 flow, removed 207 selfloop flow, removed 29 redundant places. [2021-12-17 23:03:58,916 INFO L242 Difference]: Finished difference. Result has 340 places, 840 transitions, 9198 flow [2021-12-17 23:03:58,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=6663, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=9198, PETRI_PLACES=340, PETRI_TRANSITIONS=840} [2021-12-17 23:03:58,917 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 198 predicate places. [2021-12-17 23:03:58,917 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 840 transitions, 9198 flow [2021-12-17 23:03:58,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.72) internal successors, (1868), 25 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:03:58,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:03:58,918 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] [2021-12-17 23:03:58,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:03:59,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:59,135 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:03:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:03:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1027093238, now seen corresponding path program 2 times [2021-12-17 23:03:59,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:03:59,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012572564] [2021-12-17 23:03:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:03:59,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:03:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:03:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:03:59,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:03:59,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012572564] [2021-12-17 23:03:59,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012572564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:03:59,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488252932] [2021-12-17 23:03:59,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:03:59,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:03:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:03:59,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:03:59,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:03:59,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:03:59,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:03:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 23:03:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:04:00,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:04:00,889 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 53 treesize of output 37 [2021-12-17 23:04:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:04:01,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:04:01,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:04:01,748 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 99 treesize of output 59 [2021-12-17 23:04:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:04:03,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488252932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:04:03,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:04:03,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 22] total 69 [2021-12-17 23:04:03,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851595884] [2021-12-17 23:04:03,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:04:03,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-17 23:04:03,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:04:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-17 23:04:03,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=3866, Unknown=0, NotChecked=0, Total=4692 [2021-12-17 23:04:03,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 159 [2021-12-17 23:04:03,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 840 transitions, 9198 flow. Second operand has 69 states, 69 states have (on average 69.0) internal successors, (4761), 69 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:03,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:04:03,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 159 [2021-12-17 23:04:03,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:04:14,931 INFO L129 PetriNetUnfolder]: 29280/46861 cut-off events. [2021-12-17 23:04:14,931 INFO L130 PetriNetUnfolder]: For 300359/300692 co-relation queries the response was YES. [2021-12-17 23:04:15,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229882 conditions, 46861 events. 29280/46861 cut-off events. For 300359/300692 co-relation queries the response was YES. Maximal size of possible extension queue 2537. Compared 399080 event pairs, 2310 based on Foata normal form. 73/46724 useless extension candidates. Maximal degree in co-relation 229801. Up to 19077 conditions per place. [2021-12-17 23:04:16,171 INFO L132 encePairwiseOnDemand]: 122/159 looper letters, 1104 selfloop transitions, 938 changer transitions 6/2106 dead transitions. [2021-12-17 23:04:16,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 2106 transitions, 26420 flow [2021-12-17 23:04:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-17 23:04:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-17 23:04:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4286 transitions. [2021-12-17 23:04:16,177 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47291183934679465 [2021-12-17 23:04:16,177 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4286 transitions. [2021-12-17 23:04:16,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4286 transitions. [2021-12-17 23:04:16,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:04:16,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4286 transitions. [2021-12-17 23:04:16,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 75.19298245614036) internal successors, (4286), 57 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:16,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 159.0) internal successors, (9222), 58 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:16,189 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 159.0) internal successors, (9222), 58 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:16,189 INFO L186 Difference]: Start difference. First operand has 340 places, 840 transitions, 9198 flow. Second operand 57 states and 4286 transitions. [2021-12-17 23:04:16,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 2106 transitions, 26420 flow [2021-12-17 23:04:21,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 2106 transitions, 26180 flow, removed 92 selfloop flow, removed 12 redundant places. [2021-12-17 23:04:21,286 INFO L242 Difference]: Finished difference. Result has 409 places, 1499 transitions, 20403 flow [2021-12-17 23:04:21,286 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=9089, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=20403, PETRI_PLACES=409, PETRI_TRANSITIONS=1499} [2021-12-17 23:04:21,287 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 267 predicate places. [2021-12-17 23:04:21,287 INFO L470 AbstractCegarLoop]: Abstraction has has 409 places, 1499 transitions, 20403 flow [2021-12-17 23:04:21,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 69.0) internal successors, (4761), 69 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:21,288 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:04:21,288 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] [2021-12-17 23:04:21,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:04:21,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:04:21,504 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:04:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:04:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2022782126, now seen corresponding path program 3 times [2021-12-17 23:04:21,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:04:21,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74663317] [2021-12-17 23:04:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:04:21,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:04:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:04:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:04:22,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:04:22,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74663317] [2021-12-17 23:04:22,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74663317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:04:22,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584819302] [2021-12-17 23:04:22,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:04:22,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:04:22,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:04:22,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:04:22,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:04:22,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:04:22,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:04:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 23:04:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:04:22,609 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 11 treesize of output 7 [2021-12-17 23:04:22,877 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 [2021-12-17 23:04:22,950 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 [2021-12-17 23:04:23,016 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 [2021-12-17 23:04:23,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:04:23,463 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 59 treesize of output 39 [2021-12-17 23:04:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:04:23,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:04:33,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:04:33,885 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 259 treesize of output 176 [2021-12-17 23:04:33,906 INFO L354 Elim1Store]: treesize reduction 26, result has 36.6 percent of original size [2021-12-17 23:04:33,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1814 treesize of output 1732 [2021-12-17 23:04:33,933 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-12-17 23:04:33,933 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 1713 treesize of output 1666 [2021-12-17 23:04:33,958 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-12-17 23:04:33,959 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 1661 treesize of output 1458 [2021-12-17 23:04:33,983 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-12-17 23:04:33,983 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 1453 treesize of output 1418 [2021-12-17 23:04:34,009 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-12-17 23:04:34,010 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 1413 treesize of output 1398 [2021-12-17 23:04:34,036 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-12-17 23:04:34,037 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 1393 treesize of output 1388 [2021-12-17 23:04:34,064 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-12-17 23:04:34,065 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 1383 treesize of output 1284 [2021-12-17 23:04:34,087 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 23:04:34,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:04:34,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-12-17 23:04:34,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452445448] [2021-12-17 23:04:34,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 23:04:34,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 23:04:34,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:04:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 23:04:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=4294, Unknown=86, NotChecked=0, Total=5256 [2021-12-17 23:04:34,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 159 [2021-12-17 23:04:34,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1499 transitions, 20403 flow. Second operand has 30 states, 30 states have (on average 74.36666666666666) internal successors, (2231), 30 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:34,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:04:34,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 159 [2021-12-17 23:04:34,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:04:44,501 INFO L129 PetriNetUnfolder]: 19750/34464 cut-off events. [2021-12-17 23:04:44,501 INFO L130 PetriNetUnfolder]: For 334921/336780 co-relation queries the response was YES. [2021-12-17 23:04:46,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195731 conditions, 34464 events. 19750/34464 cut-off events. For 334921/336780 co-relation queries the response was YES. Maximal size of possible extension queue 1976. Compared 313087 event pairs, 2094 based on Foata normal form. 540/34442 useless extension candidates. Maximal degree in co-relation 195625. Up to 18556 conditions per place. [2021-12-17 23:04:46,363 INFO L132 encePairwiseOnDemand]: 122/159 looper letters, 865 selfloop transitions, 760 changer transitions 6/1743 dead transitions. [2021-12-17 23:04:46,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1743 transitions, 26180 flow [2021-12-17 23:04:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 23:04:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 23:04:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2873 transitions. [2021-12-17 23:04:46,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5019217330538085 [2021-12-17 23:04:46,367 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2873 transitions. [2021-12-17 23:04:46,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2873 transitions. [2021-12-17 23:04:46,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:04:46,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2873 transitions. [2021-12-17 23:04:46,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.80555555555556) internal successors, (2873), 36 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:46,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:46,375 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:04:46,375 INFO L186 Difference]: Start difference. First operand has 409 places, 1499 transitions, 20403 flow. Second operand 36 states and 2873 transitions. [2021-12-17 23:04:46,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1743 transitions, 26180 flow