./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-ticket-4.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 57b9f50bcc1a62fff86b613ffbbe182d8b5828efa44efacd776b022a56af4d4d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:19:05,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:19:05,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:19:05,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:19:05,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:19:05,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:19:05,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:19:05,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:19:05,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:19:05,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:19:05,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:19:05,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:19:05,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:19:05,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:19:05,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:19:05,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:19:05,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:19:05,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:19:05,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:19:05,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:19:05,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:19:05,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:19:05,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:19:05,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:19:05,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:19:05,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:19:05,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:19:05,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:19:05,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:19:05,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:19:05,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:19:05,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:19:05,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:19:05,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:19:05,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:19:05,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:19:05,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:19:05,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:19:05,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:19:05,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:19:05,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:19:05,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:19:05,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:19:05,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:19:05,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:19:05,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:19:05,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:19:05,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:19:05,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:19:05,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:19:05,630 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:19:05,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:19:05,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:19:05,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:19:05,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:19:05,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:19:05,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:19:05,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:19:05,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:19:05,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:19:05,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:19:05,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:19:05,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:19:05,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:19:05,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:19:05,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:19:05,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:19:05,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:19:05,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:19:05,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:19:05,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:19:05,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:19:05,635 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:19:05,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:19:05,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:19:05,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:19:05,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b9f50bcc1a62fff86b613ffbbe182d8b5828efa44efacd776b022a56af4d4d [2021-12-21 15:19:05,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:19:05,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:19:05,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:19:05,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:19:05,897 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:19:05,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c [2021-12-21 15:19:05,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa7f455be/0683260a07394b0cb61e326ef71059ac/FLAGfcec7c8f8 [2021-12-21 15:19:06,359 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:19:06,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-ticket-4.wvr.c [2021-12-21 15:19:06,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa7f455be/0683260a07394b0cb61e326ef71059ac/FLAGfcec7c8f8 [2021-12-21 15:19:06,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa7f455be/0683260a07394b0cb61e326ef71059ac [2021-12-21 15:19:06,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:19:06,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:19:06,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:19:06,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:19:06,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:19:06,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:06,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec19244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06, skipping insertion in model container [2021-12-21 15:19:06,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:06,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:19:06,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:19:06,954 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/parallel-ticket-4.wvr.c[3526,3539] [2021-12-21 15:19:06,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:19:06,963 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:19:06,983 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/parallel-ticket-4.wvr.c[3526,3539] [2021-12-21 15:19:06,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:19:06,996 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:19:06,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06 WrapperNode [2021-12-21 15:19:06,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:19:07,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:19:07,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:19:07,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:19:07,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,036 INFO L137 Inliner]: procedures = 23, calls = 70, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 198 [2021-12-21 15:19:07,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:19:07,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:19:07,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:19:07,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:19:07,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:19:07,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:19:07,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:19:07,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:19:07,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (1/1) ... [2021-12-21 15:19:07,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:19:07,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:19:07,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:19:07,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:19:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:19:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:19:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:19:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:19:07,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:19:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:19:07,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:19:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-21 15:19:07,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-21 15:19:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:19:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:19:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:19:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:19:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:19:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:19:07,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:19:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:19:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:19:07,153 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:19:07,236 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:19:07,237 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:19:07,448 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:19:07,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:19:07,549 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 15:19:07,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:19:07 BoogieIcfgContainer [2021-12-21 15:19:07,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:19:07,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:19:07,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:19:07,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:19:07,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:19:06" (1/3) ... [2021-12-21 15:19:07,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f343ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:19:07, skipping insertion in model container [2021-12-21 15:19:07,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:06" (2/3) ... [2021-12-21 15:19:07,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f343ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:19:07, skipping insertion in model container [2021-12-21 15:19:07,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:19:07" (3/3) ... [2021-12-21 15:19:07,559 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-ticket-4.wvr.c [2021-12-21 15:19:07,563 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:19:07,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:19:07,564 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:19:07,564 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:19:07,623 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,624 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,625 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,625 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,625 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,626 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,626 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,626 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,627 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,627 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,627 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,627 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,628 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,628 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,628 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,629 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,629 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,629 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,634 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,634 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,636 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,638 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,638 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,638 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,639 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,639 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,640 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,640 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,646 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,647 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,647 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,660 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,661 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,661 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,661 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,661 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,662 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,662 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,663 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,663 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,663 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,663 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,663 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,664 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,666 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,667 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,667 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,667 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,667 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,668 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,668 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,669 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,669 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,669 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,669 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,669 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,670 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,670 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,670 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,671 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,671 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,671 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:07,678 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-21 15:19:07,725 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:19:07,732 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:19:07,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-21 15:19:07,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 153 places, 142 transitions, 316 flow [2021-12-21 15:19:07,856 INFO L129 PetriNetUnfolder]: 2/138 cut-off events. [2021-12-21 15:19:07,857 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-21 15:19:07,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 138 events. 2/138 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2021-12-21 15:19:07,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 142 transitions, 316 flow [2021-12-21 15:19:07,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 125 transitions, 274 flow [2021-12-21 15:19:07,920 INFO L129 PetriNetUnfolder]: 2/124 cut-off events. [2021-12-21 15:19:07,920 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-21 15:19:07,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:07,922 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] [2021-12-21 15:19:07,925 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash 371553834, now seen corresponding path program 1 times [2021-12-21 15:19:07,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:07,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108780094] [2021-12-21 15:19:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:07,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:08,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108780094] [2021-12-21 15:19:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108780094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:08,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 15:19:08,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011695409] [2021-12-21 15:19:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:08,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:19:08,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:19:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:19:08,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 142 [2021-12-21 15:19:08,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 125 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 97.58333333333333) internal successors, (1171), 12 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:08,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:08,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 142 [2021-12-21 15:19:08,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:10,466 INFO L129 PetriNetUnfolder]: 3889/7196 cut-off events. [2021-12-21 15:19:10,467 INFO L130 PetriNetUnfolder]: For 1329/1329 co-relation queries the response was YES. [2021-12-21 15:19:10,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13841 conditions, 7196 events. 3889/7196 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 52361 event pairs, 1937 based on Foata normal form. 4/7009 useless extension candidates. Maximal degree in co-relation 10867. Up to 2051 conditions per place. [2021-12-21 15:19:10,515 INFO L132 encePairwiseOnDemand]: 120/142 looper letters, 94 selfloop transitions, 23 changer transitions 23/218 dead transitions. [2021-12-21 15:19:10,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 218 transitions, 800 flow [2021-12-21 15:19:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 15:19:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-21 15:19:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1650 transitions. [2021-12-21 15:19:10,533 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7262323943661971 [2021-12-21 15:19:10,534 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1650 transitions. [2021-12-21 15:19:10,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1650 transitions. [2021-12-21 15:19:10,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:10,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1650 transitions. [2021-12-21 15:19:10,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 103.125) internal successors, (1650), 16 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:10,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:10,556 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:10,557 INFO L186 Difference]: Start difference. First operand has 136 places, 125 transitions, 274 flow. Second operand 16 states and 1650 transitions. [2021-12-21 15:19:10,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 218 transitions, 800 flow [2021-12-21 15:19:10,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 218 transitions, 744 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-21 15:19:10,573 INFO L242 Difference]: Finished difference. Result has 153 places, 138 transitions, 406 flow [2021-12-21 15:19:10,575 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=406, PETRI_PLACES=153, PETRI_TRANSITIONS=138} [2021-12-21 15:19:10,578 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 17 predicate places. [2021-12-21 15:19:10,578 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 138 transitions, 406 flow [2021-12-21 15:19:10,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 97.58333333333333) internal successors, (1171), 12 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:10,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:10,580 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] [2021-12-21 15:19:10,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:19:10,580 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash -319312236, now seen corresponding path program 2 times [2021-12-21 15:19:10,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:10,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760793793] [2021-12-21 15:19:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:10,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:11,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:11,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760793793] [2021-12-21 15:19:11,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760793793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:11,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:11,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 15:19:11,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575386368] [2021-12-21 15:19:11,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:11,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:19:11,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:19:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-21 15:19:11,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 142 [2021-12-21 15:19:11,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 138 transitions, 406 flow. Second operand has 12 states, 12 states have (on average 99.41666666666667) internal successors, (1193), 12 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:11,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:11,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 142 [2021-12-21 15:19:11,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:12,330 INFO L129 PetriNetUnfolder]: 3356/6094 cut-off events. [2021-12-21 15:19:12,331 INFO L130 PetriNetUnfolder]: For 4711/4744 co-relation queries the response was YES. [2021-12-21 15:19:12,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15830 conditions, 6094 events. 3356/6094 cut-off events. For 4711/4744 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42071 event pairs, 1456 based on Foata normal form. 2/5918 useless extension candidates. Maximal degree in co-relation 15811. Up to 4080 conditions per place. [2021-12-21 15:19:12,380 INFO L132 encePairwiseOnDemand]: 122/142 looper letters, 70 selfloop transitions, 24 changer transitions 52/226 dead transitions. [2021-12-21 15:19:12,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 226 transitions, 1038 flow [2021-12-21 15:19:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 15:19:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-21 15:19:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1671 transitions. [2021-12-21 15:19:12,386 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.735475352112676 [2021-12-21 15:19:12,386 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1671 transitions. [2021-12-21 15:19:12,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1671 transitions. [2021-12-21 15:19:12,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:12,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1671 transitions. [2021-12-21 15:19:12,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 104.4375) internal successors, (1671), 16 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:12,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:12,398 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:12,398 INFO L186 Difference]: Start difference. First operand has 153 places, 138 transitions, 406 flow. Second operand 16 states and 1671 transitions. [2021-12-21 15:19:12,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 226 transitions, 1038 flow [2021-12-21 15:19:12,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 991 flow, removed 14 selfloop flow, removed 8 redundant places. [2021-12-21 15:19:12,414 INFO L242 Difference]: Finished difference. Result has 161 places, 153 transitions, 550 flow [2021-12-21 15:19:12,414 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=550, PETRI_PLACES=161, PETRI_TRANSITIONS=153} [2021-12-21 15:19:12,415 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 25 predicate places. [2021-12-21 15:19:12,415 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 153 transitions, 550 flow [2021-12-21 15:19:12,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.41666666666667) internal successors, (1193), 12 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:12,416 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:12,416 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] [2021-12-21 15:19:12,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:19:12,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:12,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1555202034, now seen corresponding path program 3 times [2021-12-21 15:19:12,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:12,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337508385] [2021-12-21 15:19:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:12,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:12,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:12,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337508385] [2021-12-21 15:19:12,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337508385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:12,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:12,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:19:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006542268] [2021-12-21 15:19:12,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:12,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:19:12,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:19:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:19:12,687 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 142 [2021-12-21 15:19:12,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 153 transitions, 550 flow. Second operand has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:12,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:12,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 142 [2021-12-21 15:19:12,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:13,649 INFO L129 PetriNetUnfolder]: 3512/6511 cut-off events. [2021-12-21 15:19:13,649 INFO L130 PetriNetUnfolder]: For 9120/9145 co-relation queries the response was YES. [2021-12-21 15:19:13,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19618 conditions, 6511 events. 3512/6511 cut-off events. For 9120/9145 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 46623 event pairs, 1533 based on Foata normal form. 2/6292 useless extension candidates. Maximal degree in co-relation 19595. Up to 3139 conditions per place. [2021-12-21 15:19:13,821 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 58 selfloop transitions, 16 changer transitions 45/203 dead transitions. [2021-12-21 15:19:13,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 203 transitions, 1040 flow [2021-12-21 15:19:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:19:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:19:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1089 transitions. [2021-12-21 15:19:13,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7669014084507042 [2021-12-21 15:19:13,825 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1089 transitions. [2021-12-21 15:19:13,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1089 transitions. [2021-12-21 15:19:13,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:13,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1089 transitions. [2021-12-21 15:19:13,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.9) internal successors, (1089), 10 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:13,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:13,832 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:13,832 INFO L186 Difference]: Start difference. First operand has 161 places, 153 transitions, 550 flow. Second operand 10 states and 1089 transitions. [2021-12-21 15:19:13,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 203 transitions, 1040 flow [2021-12-21 15:19:13,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 203 transitions, 987 flow, removed 21 selfloop flow, removed 10 redundant places. [2021-12-21 15:19:13,844 INFO L242 Difference]: Finished difference. Result has 158 places, 148 transitions, 556 flow [2021-12-21 15:19:13,845 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=556, PETRI_PLACES=158, PETRI_TRANSITIONS=148} [2021-12-21 15:19:13,845 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 22 predicate places. [2021-12-21 15:19:13,846 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 148 transitions, 556 flow [2021-12-21 15:19:13,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:13,846 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:13,847 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] [2021-12-21 15:19:13,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:19:13,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 309347148, now seen corresponding path program 4 times [2021-12-21 15:19:13,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:13,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536648910] [2021-12-21 15:19:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:13,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:13,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536648910] [2021-12-21 15:19:13,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536648910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:13,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:13,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:19:13,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921645400] [2021-12-21 15:19:13,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:13,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:19:13,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:13,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:19:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:19:13,981 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:13,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 148 transitions, 556 flow. Second operand has 7 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:13,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:13,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:13,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:14,634 INFO L129 PetriNetUnfolder]: 2357/5433 cut-off events. [2021-12-21 15:19:14,634 INFO L130 PetriNetUnfolder]: For 9864/10374 co-relation queries the response was YES. [2021-12-21 15:19:14,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15715 conditions, 5433 events. 2357/5433 cut-off events. For 9864/10374 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 46111 event pairs, 546 based on Foata normal form. 113/5350 useless extension candidates. Maximal degree in co-relation 15693. Up to 1164 conditions per place. [2021-12-21 15:19:14,702 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 70 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2021-12-21 15:19:14,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 198 transitions, 948 flow [2021-12-21 15:19:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:19:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:19:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 802 transitions. [2021-12-21 15:19:14,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.806841046277666 [2021-12-21 15:19:14,705 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 802 transitions. [2021-12-21 15:19:14,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 802 transitions. [2021-12-21 15:19:14,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:14,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 802 transitions. [2021-12-21 15:19:14,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.57142857142857) internal successors, (802), 7 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:14,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:14,711 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:14,711 INFO L186 Difference]: Start difference. First operand has 158 places, 148 transitions, 556 flow. Second operand 7 states and 802 transitions. [2021-12-21 15:19:14,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 198 transitions, 948 flow [2021-12-21 15:19:14,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 198 transitions, 898 flow, removed 15 selfloop flow, removed 8 redundant places. [2021-12-21 15:19:14,728 INFO L242 Difference]: Finished difference. Result has 152 places, 164 transitions, 671 flow [2021-12-21 15:19:14,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=671, PETRI_PLACES=152, PETRI_TRANSITIONS=164} [2021-12-21 15:19:14,729 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 16 predicate places. [2021-12-21 15:19:14,729 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 164 transitions, 671 flow [2021-12-21 15:19:14,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:14,730 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:14,730 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] [2021-12-21 15:19:14,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:19:14,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1227166372, now seen corresponding path program 5 times [2021-12-21 15:19:14,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:14,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479772195] [2021-12-21 15:19:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:14,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:14,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479772195] [2021-12-21 15:19:14,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479772195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:14,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:14,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:19:14,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896381119] [2021-12-21 15:19:14,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:14,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:19:14,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:19:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:19:14,819 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:14,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 164 transitions, 671 flow. Second operand has 8 states, 8 states have (on average 107.25) internal successors, (858), 8 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:14,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:14,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:14,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:15,693 INFO L129 PetriNetUnfolder]: 2738/6174 cut-off events. [2021-12-21 15:19:15,693 INFO L130 PetriNetUnfolder]: For 13606/14028 co-relation queries the response was YES. [2021-12-21 15:19:15,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20320 conditions, 6174 events. 2738/6174 cut-off events. For 13606/14028 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 52885 event pairs, 559 based on Foata normal form. 164/6078 useless extension candidates. Maximal degree in co-relation 7543. Up to 1501 conditions per place. [2021-12-21 15:19:15,751 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 76 selfloop transitions, 60 changer transitions 2/242 dead transitions. [2021-12-21 15:19:15,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 242 transitions, 1366 flow [2021-12-21 15:19:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:19:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:19:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2021-12-21 15:19:15,754 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8133802816901409 [2021-12-21 15:19:15,754 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2021-12-21 15:19:15,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2021-12-21 15:19:15,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:15,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2021-12-21 15:19:15,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:15,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:15,760 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:15,760 INFO L186 Difference]: Start difference. First operand has 152 places, 164 transitions, 671 flow. Second operand 8 states and 924 transitions. [2021-12-21 15:19:15,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 242 transitions, 1366 flow [2021-12-21 15:19:15,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 242 transitions, 1310 flow, removed 26 selfloop flow, removed 3 redundant places. [2021-12-21 15:19:15,782 INFO L242 Difference]: Finished difference. Result has 159 places, 198 transitions, 1092 flow [2021-12-21 15:19:15,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1092, PETRI_PLACES=159, PETRI_TRANSITIONS=198} [2021-12-21 15:19:15,785 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 23 predicate places. [2021-12-21 15:19:15,785 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 198 transitions, 1092 flow [2021-12-21 15:19:15,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.25) internal successors, (858), 8 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:15,788 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:15,788 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] [2021-12-21 15:19:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:19:15,788 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1585665588, now seen corresponding path program 6 times [2021-12-21 15:19:15,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401099523] [2021-12-21 15:19:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:15,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:15,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401099523] [2021-12-21 15:19:15,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401099523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:15,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:15,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:19:15,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642124773] [2021-12-21 15:19:15,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:15,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:19:15,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:19:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:19:15,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:15,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 198 transitions, 1092 flow. Second operand has 10 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:15,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:15,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:15,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:16,741 INFO L129 PetriNetUnfolder]: 2540/5759 cut-off events. [2021-12-21 15:19:16,741 INFO L130 PetriNetUnfolder]: For 19286/19994 co-relation queries the response was YES. [2021-12-21 15:19:16,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22012 conditions, 5759 events. 2540/5759 cut-off events. For 19286/19994 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 49708 event pairs, 342 based on Foata normal form. 385/5876 useless extension candidates. Maximal degree in co-relation 14778. Up to 1229 conditions per place. [2021-12-21 15:19:16,811 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 86 selfloop transitions, 121 changer transitions 2/313 dead transitions. [2021-12-21 15:19:16,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 313 transitions, 2321 flow [2021-12-21 15:19:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:19:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:19:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1257 transitions. [2021-12-21 15:19:16,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8047375160051217 [2021-12-21 15:19:16,815 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1257 transitions. [2021-12-21 15:19:16,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1257 transitions. [2021-12-21 15:19:16,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:16,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1257 transitions. [2021-12-21 15:19:16,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 114.27272727272727) internal successors, (1257), 11 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:16,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:16,822 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:16,823 INFO L186 Difference]: Start difference. First operand has 159 places, 198 transitions, 1092 flow. Second operand 11 states and 1257 transitions. [2021-12-21 15:19:16,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 313 transitions, 2321 flow [2021-12-21 15:19:16,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 313 transitions, 2269 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-12-21 15:19:16,849 INFO L242 Difference]: Finished difference. Result has 172 places, 253 transitions, 1978 flow [2021-12-21 15:19:16,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1978, PETRI_PLACES=172, PETRI_TRANSITIONS=253} [2021-12-21 15:19:16,852 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 36 predicate places. [2021-12-21 15:19:16,852 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 253 transitions, 1978 flow [2021-12-21 15:19:16,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:16,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:16,853 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] [2021-12-21 15:19:16,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:19:16,853 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1355584276, now seen corresponding path program 7 times [2021-12-21 15:19:16,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:16,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69628424] [2021-12-21 15:19:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:16,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:16,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69628424] [2021-12-21 15:19:16,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69628424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:16,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:16,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:19:16,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696245730] [2021-12-21 15:19:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:16,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:19:16,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:19:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:19:16,973 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:16,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 253 transitions, 1978 flow. Second operand has 8 states, 8 states have (on average 107.25) internal successors, (858), 8 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:16,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:16,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:16,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:17,844 INFO L129 PetriNetUnfolder]: 2529/6028 cut-off events. [2021-12-21 15:19:17,844 INFO L130 PetriNetUnfolder]: For 33018/34107 co-relation queries the response was YES. [2021-12-21 15:19:17,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25882 conditions, 6028 events. 2529/6028 cut-off events. For 33018/34107 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 53511 event pairs, 487 based on Foata normal form. 370/6096 useless extension candidates. Maximal degree in co-relation 10615. Up to 1455 conditions per place. [2021-12-21 15:19:17,918 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 83 selfloop transitions, 115 changer transitions 1/303 dead transitions. [2021-12-21 15:19:17,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 303 transitions, 2689 flow [2021-12-21 15:19:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:19:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:19:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2021-12-21 15:19:17,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8133802816901409 [2021-12-21 15:19:17,922 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2021-12-21 15:19:17,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2021-12-21 15:19:17,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:17,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2021-12-21 15:19:17,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:17,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:17,928 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:17,928 INFO L186 Difference]: Start difference. First operand has 172 places, 253 transitions, 1978 flow. Second operand 8 states and 924 transitions. [2021-12-21 15:19:17,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 303 transitions, 2689 flow [2021-12-21 15:19:17,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 303 transitions, 2608 flow, removed 31 selfloop flow, removed 4 redundant places. [2021-12-21 15:19:17,997 INFO L242 Difference]: Finished difference. Result has 176 places, 262 transitions, 2269 flow [2021-12-21 15:19:17,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2269, PETRI_PLACES=176, PETRI_TRANSITIONS=262} [2021-12-21 15:19:17,999 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 40 predicate places. [2021-12-21 15:19:17,999 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 262 transitions, 2269 flow [2021-12-21 15:19:18,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.25) internal successors, (858), 8 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:18,000 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:18,000 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:18,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:19:18,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 185697594, now seen corresponding path program 8 times [2021-12-21 15:19:18,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:18,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225974723] [2021-12-21 15:19:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:18,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:18,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225974723] [2021-12-21 15:19:18,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225974723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:18,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:18,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:19:18,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600759428] [2021-12-21 15:19:18,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:18,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:19:18,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:19:18,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:19:18,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:18,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 262 transitions, 2269 flow. Second operand has 7 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:18,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:18,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:18,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:19,101 INFO L129 PetriNetUnfolder]: 2232/5485 cut-off events. [2021-12-21 15:19:19,102 INFO L130 PetriNetUnfolder]: For 34806/35924 co-relation queries the response was YES. [2021-12-21 15:19:19,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25152 conditions, 5485 events. 2232/5485 cut-off events. For 34806/35924 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 50048 event pairs, 637 based on Foata normal form. 364/5576 useless extension candidates. Maximal degree in co-relation 16710. Up to 1276 conditions per place. [2021-12-21 15:19:19,172 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 111 selfloop transitions, 86 changer transitions 3/302 dead transitions. [2021-12-21 15:19:19,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 302 transitions, 3001 flow [2021-12-21 15:19:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:19:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:19:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 801 transitions. [2021-12-21 15:19:19,175 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8058350100603622 [2021-12-21 15:19:19,176 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 801 transitions. [2021-12-21 15:19:19,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 801 transitions. [2021-12-21 15:19:19,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:19,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 801 transitions. [2021-12-21 15:19:19,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:19,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:19,181 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:19,181 INFO L186 Difference]: Start difference. First operand has 176 places, 262 transitions, 2269 flow. Second operand 7 states and 801 transitions. [2021-12-21 15:19:19,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 302 transitions, 3001 flow [2021-12-21 15:19:19,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 302 transitions, 2825 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-21 15:19:19,251 INFO L242 Difference]: Finished difference. Result has 179 places, 267 transitions, 2435 flow [2021-12-21 15:19:19,251 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2435, PETRI_PLACES=179, PETRI_TRANSITIONS=267} [2021-12-21 15:19:19,253 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 43 predicate places. [2021-12-21 15:19:19,254 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 267 transitions, 2435 flow [2021-12-21 15:19:19,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:19,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:19,255 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] [2021-12-21 15:19:19,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:19:19,255 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1206902234, now seen corresponding path program 9 times [2021-12-21 15:19:19,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:19,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326579198] [2021-12-21 15:19:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:19,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:19,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:19,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326579198] [2021-12-21 15:19:19,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326579198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:19,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:19,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:19:19,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343763687] [2021-12-21 15:19:19,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:19,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:19:19,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:19:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:19:19,346 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:19,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 267 transitions, 2435 flow. Second operand has 7 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:19,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:19,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:19,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:20,003 INFO L129 PetriNetUnfolder]: 1156/3311 cut-off events. [2021-12-21 15:19:20,003 INFO L130 PetriNetUnfolder]: For 23493/24268 co-relation queries the response was YES. [2021-12-21 15:19:20,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15239 conditions, 3311 events. 1156/3311 cut-off events. For 23493/24268 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 27860 event pairs, 231 based on Foata normal form. 293/3477 useless extension candidates. Maximal degree in co-relation 11193. Up to 745 conditions per place. [2021-12-21 15:19:20,050 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 105 selfloop transitions, 98 changer transitions 1/301 dead transitions. [2021-12-21 15:19:20,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 301 transitions, 3154 flow [2021-12-21 15:19:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:19:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:19:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 799 transitions. [2021-12-21 15:19:20,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8038229376257545 [2021-12-21 15:19:20,053 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 799 transitions. [2021-12-21 15:19:20,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 799 transitions. [2021-12-21 15:19:20,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:20,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 799 transitions. [2021-12-21 15:19:20,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.14285714285714) internal successors, (799), 7 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,059 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,059 INFO L186 Difference]: Start difference. First operand has 179 places, 267 transitions, 2435 flow. Second operand 7 states and 799 transitions. [2021-12-21 15:19:20,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 301 transitions, 3154 flow [2021-12-21 15:19:20,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 301 transitions, 3005 flow, removed 9 selfloop flow, removed 7 redundant places. [2021-12-21 15:19:20,106 INFO L242 Difference]: Finished difference. Result has 180 places, 273 transitions, 2723 flow [2021-12-21 15:19:20,107 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2723, PETRI_PLACES=180, PETRI_TRANSITIONS=273} [2021-12-21 15:19:20,108 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 44 predicate places. [2021-12-21 15:19:20,108 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 273 transitions, 2723 flow [2021-12-21 15:19:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:20,109 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] [2021-12-21 15:19:20,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 15:19:20,110 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1638573064, now seen corresponding path program 10 times [2021-12-21 15:19:20,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:20,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283087866] [2021-12-21 15:19:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:20,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:20,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:20,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283087866] [2021-12-21 15:19:20,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283087866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:20,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:20,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:19:20,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650601376] [2021-12-21 15:19:20,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:20,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:19:20,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:19:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:19:20,232 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:20,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 273 transitions, 2723 flow. Second operand has 8 states, 8 states have (on average 107.25) internal successors, (858), 8 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:20,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:20,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:20,849 INFO L129 PetriNetUnfolder]: 1147/3232 cut-off events. [2021-12-21 15:19:20,849 INFO L130 PetriNetUnfolder]: For 25223/26218 co-relation queries the response was YES. [2021-12-21 15:19:20,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15534 conditions, 3232 events. 1147/3232 cut-off events. For 25223/26218 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 26907 event pairs, 143 based on Foata normal form. 368/3454 useless extension candidates. Maximal degree in co-relation 9572. Up to 694 conditions per place. [2021-12-21 15:19:20,890 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 85 selfloop transitions, 138 changer transitions 5/325 dead transitions. [2021-12-21 15:19:20,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 325 transitions, 3565 flow [2021-12-21 15:19:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 15:19:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-21 15:19:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2021-12-21 15:19:20,893 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8133802816901409 [2021-12-21 15:19:20,893 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2021-12-21 15:19:20,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2021-12-21 15:19:20,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:20,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2021-12-21 15:19:20,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.5) internal successors, (924), 8 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,900 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,900 INFO L186 Difference]: Start difference. First operand has 180 places, 273 transitions, 2723 flow. Second operand 8 states and 924 transitions. [2021-12-21 15:19:20,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 325 transitions, 3565 flow [2021-12-21 15:19:20,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 325 transitions, 3428 flow, removed 11 selfloop flow, removed 4 redundant places. [2021-12-21 15:19:20,948 INFO L242 Difference]: Finished difference. Result has 184 places, 277 transitions, 2980 flow [2021-12-21 15:19:20,949 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2980, PETRI_PLACES=184, PETRI_TRANSITIONS=277} [2021-12-21 15:19:20,949 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 48 predicate places. [2021-12-21 15:19:20,950 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 277 transitions, 2980 flow [2021-12-21 15:19:20,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.25) internal successors, (858), 8 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:20,950 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:20,950 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] [2021-12-21 15:19:20,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 15:19:20,951 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1813783264, now seen corresponding path program 11 times [2021-12-21 15:19:20,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:20,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080308661] [2021-12-21 15:19:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:20,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:21,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080308661] [2021-12-21 15:19:21,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080308661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:21,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:21,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 15:19:21,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570217126] [2021-12-21 15:19:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:21,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:19:21,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:19:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:19:21,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:21,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 277 transitions, 2980 flow. Second operand has 9 states, 9 states have (on average 106.77777777777777) internal successors, (961), 9 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:21,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:21,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:21,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:21,715 INFO L129 PetriNetUnfolder]: 1061/3089 cut-off events. [2021-12-21 15:19:21,716 INFO L130 PetriNetUnfolder]: For 26992/27914 co-relation queries the response was YES. [2021-12-21 15:19:21,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15227 conditions, 3089 events. 1061/3089 cut-off events. For 26992/27914 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 25918 event pairs, 147 based on Foata normal form. 388/3344 useless extension candidates. Maximal degree in co-relation 6523. Up to 623 conditions per place. [2021-12-21 15:19:21,751 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 94 selfloop transitions, 144 changer transitions 8/343 dead transitions. [2021-12-21 15:19:21,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 343 transitions, 3965 flow [2021-12-21 15:19:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:19:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:19:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1153 transitions. [2021-12-21 15:19:21,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8119718309859155 [2021-12-21 15:19:21,756 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1153 transitions. [2021-12-21 15:19:21,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1153 transitions. [2021-12-21 15:19:21,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:21,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1153 transitions. [2021-12-21 15:19:21,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.3) internal successors, (1153), 10 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:21,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:21,762 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:21,763 INFO L186 Difference]: Start difference. First operand has 184 places, 277 transitions, 2980 flow. Second operand 10 states and 1153 transitions. [2021-12-21 15:19:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 343 transitions, 3965 flow [2021-12-21 15:19:21,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 343 transitions, 3618 flow, removed 9 selfloop flow, removed 8 redundant places. [2021-12-21 15:19:21,819 INFO L242 Difference]: Finished difference. Result has 187 places, 283 transitions, 3080 flow [2021-12-21 15:19:21,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3080, PETRI_PLACES=187, PETRI_TRANSITIONS=283} [2021-12-21 15:19:21,820 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 51 predicate places. [2021-12-21 15:19:21,820 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 283 transitions, 3080 flow [2021-12-21 15:19:21,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 106.77777777777777) internal successors, (961), 9 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:21,821 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:21,821 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] [2021-12-21 15:19:21,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 15:19:21,821 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1402516794, now seen corresponding path program 12 times [2021-12-21 15:19:21,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:21,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815676515] [2021-12-21 15:19:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:21,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:21,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:21,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815676515] [2021-12-21 15:19:21,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815676515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:21,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:21,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 15:19:21,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824919751] [2021-12-21 15:19:21,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:21,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:19:21,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:21,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:19:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:19:21,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:21,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 283 transitions, 3080 flow. Second operand has 9 states, 9 states have (on average 106.77777777777777) internal successors, (961), 9 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:21,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:21,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:21,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:22,482 INFO L129 PetriNetUnfolder]: 670/2197 cut-off events. [2021-12-21 15:19:22,482 INFO L130 PetriNetUnfolder]: For 19680/20475 co-relation queries the response was YES. [2021-12-21 15:19:22,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2197 events. 670/2197 cut-off events. For 19680/20475 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17717 event pairs, 72 based on Foata normal form. 383/2502 useless extension candidates. Maximal degree in co-relation 8813. Up to 488 conditions per place. [2021-12-21 15:19:22,501 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 85 selfloop transitions, 136 changer transitions 33/351 dead transitions. [2021-12-21 15:19:22,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 351 transitions, 4260 flow [2021-12-21 15:19:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:19:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:19:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1146 transitions. [2021-12-21 15:19:22,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8070422535211268 [2021-12-21 15:19:22,506 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1146 transitions. [2021-12-21 15:19:22,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1146 transitions. [2021-12-21 15:19:22,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:22,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1146 transitions. [2021-12-21 15:19:22,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.6) internal successors, (1146), 10 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:22,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:22,513 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:22,513 INFO L186 Difference]: Start difference. First operand has 187 places, 283 transitions, 3080 flow. Second operand 10 states and 1146 transitions. [2021-12-21 15:19:22,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 351 transitions, 4260 flow [2021-12-21 15:19:22,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 351 transitions, 3928 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-12-21 15:19:22,554 INFO L242 Difference]: Finished difference. Result has 191 places, 273 transitions, 2952 flow [2021-12-21 15:19:22,555 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2952, PETRI_PLACES=191, PETRI_TRANSITIONS=273} [2021-12-21 15:19:22,556 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 55 predicate places. [2021-12-21 15:19:22,556 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 273 transitions, 2952 flow [2021-12-21 15:19:22,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 106.77777777777777) internal successors, (961), 9 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:22,556 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:22,557 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] [2021-12-21 15:19:22,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 15:19:22,557 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1006620680, now seen corresponding path program 13 times [2021-12-21 15:19:22,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:22,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629428643] [2021-12-21 15:19:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:22,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:22,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:22,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629428643] [2021-12-21 15:19:22,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629428643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:22,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:22,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:19:22,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325930092] [2021-12-21 15:19:22,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:22,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:19:22,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:19:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:19:22,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:22,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 273 transitions, 2952 flow. Second operand has 10 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:22,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:22,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:22,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:23,140 INFO L129 PetriNetUnfolder]: 543/1937 cut-off events. [2021-12-21 15:19:23,140 INFO L130 PetriNetUnfolder]: For 16510/16975 co-relation queries the response was YES. [2021-12-21 15:19:23,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9623 conditions, 1937 events. 543/1937 cut-off events. For 16510/16975 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15238 event pairs, 58 based on Foata normal form. 213/2085 useless extension candidates. Maximal degree in co-relation 5922. Up to 397 conditions per place. [2021-12-21 15:19:23,155 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 70 selfloop transitions, 135 changer transitions 28/330 dead transitions. [2021-12-21 15:19:23,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 330 transitions, 3889 flow [2021-12-21 15:19:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:19:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:19:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1246 transitions. [2021-12-21 15:19:23,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7976952624839949 [2021-12-21 15:19:23,162 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1246 transitions. [2021-12-21 15:19:23,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1246 transitions. [2021-12-21 15:19:23,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:23,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1246 transitions. [2021-12-21 15:19:23,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 113.27272727272727) internal successors, (1246), 11 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,168 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,168 INFO L186 Difference]: Start difference. First operand has 191 places, 273 transitions, 2952 flow. Second operand 11 states and 1246 transitions. [2021-12-21 15:19:23,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 330 transitions, 3889 flow [2021-12-21 15:19:23,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 330 transitions, 3758 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-21 15:19:23,210 INFO L242 Difference]: Finished difference. Result has 197 places, 259 transitions, 2864 flow [2021-12-21 15:19:23,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2864, PETRI_PLACES=197, PETRI_TRANSITIONS=259} [2021-12-21 15:19:23,212 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 61 predicate places. [2021-12-21 15:19:23,212 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 259 transitions, 2864 flow [2021-12-21 15:19:23,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,213 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:23,213 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] [2021-12-21 15:19:23,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 15:19:23,213 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2095217038, now seen corresponding path program 14 times [2021-12-21 15:19:23,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:23,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018698088] [2021-12-21 15:19:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:23,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:23,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:23,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018698088] [2021-12-21 15:19:23,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018698088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:23,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:23,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:19:23,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784788994] [2021-12-21 15:19:23,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:23,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:19:23,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:19:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:19:23,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:23,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 259 transitions, 2864 flow. Second operand has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:23,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:23,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:23,872 INFO L129 PetriNetUnfolder]: 500/1868 cut-off events. [2021-12-21 15:19:23,872 INFO L130 PetriNetUnfolder]: For 18438/18863 co-relation queries the response was YES. [2021-12-21 15:19:23,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9424 conditions, 1868 events. 500/1868 cut-off events. For 18438/18863 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14734 event pairs, 71 based on Foata normal form. 174/1977 useless extension candidates. Maximal degree in co-relation 4616. Up to 372 conditions per place. [2021-12-21 15:19:23,885 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 69 selfloop transitions, 133 changer transitions 31/330 dead transitions. [2021-12-21 15:19:23,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 330 transitions, 4018 flow [2021-12-21 15:19:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:19:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-21 15:19:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1571 transitions. [2021-12-21 15:19:23,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.790241448692153 [2021-12-21 15:19:23,888 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1571 transitions. [2021-12-21 15:19:23,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1571 transitions. [2021-12-21 15:19:23,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:23,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1571 transitions. [2021-12-21 15:19:23,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 112.21428571428571) internal successors, (1571), 14 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,894 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,894 INFO L186 Difference]: Start difference. First operand has 197 places, 259 transitions, 2864 flow. Second operand 14 states and 1571 transitions. [2021-12-21 15:19:23,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 330 transitions, 4018 flow [2021-12-21 15:19:23,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 330 transitions, 3824 flow, removed 7 selfloop flow, removed 7 redundant places. [2021-12-21 15:19:23,933 INFO L242 Difference]: Finished difference. Result has 204 places, 257 transitions, 2952 flow [2021-12-21 15:19:23,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2952, PETRI_PLACES=204, PETRI_TRANSITIONS=257} [2021-12-21 15:19:23,934 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 68 predicate places. [2021-12-21 15:19:23,934 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 257 transitions, 2952 flow [2021-12-21 15:19:23,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:23,935 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:23,935 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:23,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 15:19:23,935 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1334773760, now seen corresponding path program 15 times [2021-12-21 15:19:23,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463431396] [2021-12-21 15:19:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:23,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:24,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463431396] [2021-12-21 15:19:24,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463431396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:24,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:24,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:19:24,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327390717] [2021-12-21 15:19:24,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:24,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:19:24,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:19:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:19:24,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:24,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 257 transitions, 2952 flow. Second operand has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:24,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:24,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:24,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:24,580 INFO L129 PetriNetUnfolder]: 460/1771 cut-off events. [2021-12-21 15:19:24,580 INFO L130 PetriNetUnfolder]: For 18653/19031 co-relation queries the response was YES. [2021-12-21 15:19:24,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 1771 events. 460/1771 cut-off events. For 18653/19031 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13957 event pairs, 64 based on Foata normal form. 190/1900 useless extension candidates. Maximal degree in co-relation 5252. Up to 338 conditions per place. [2021-12-21 15:19:24,590 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 73 selfloop transitions, 134 changer transitions 17/321 dead transitions. [2021-12-21 15:19:24,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 321 transitions, 3918 flow [2021-12-21 15:19:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:19:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-21 15:19:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1572 transitions. [2021-12-21 15:19:24,593 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7907444668008048 [2021-12-21 15:19:24,593 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1572 transitions. [2021-12-21 15:19:24,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1572 transitions. [2021-12-21 15:19:24,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:24,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1572 transitions. [2021-12-21 15:19:24,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 112.28571428571429) internal successors, (1572), 14 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:24,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:24,599 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:24,599 INFO L186 Difference]: Start difference. First operand has 204 places, 257 transitions, 2952 flow. Second operand 14 states and 1572 transitions. [2021-12-21 15:19:24,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 321 transitions, 3918 flow [2021-12-21 15:19:24,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 321 transitions, 3614 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-12-21 15:19:24,635 INFO L242 Difference]: Finished difference. Result has 205 places, 257 transitions, 2930 flow [2021-12-21 15:19:24,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2930, PETRI_PLACES=205, PETRI_TRANSITIONS=257} [2021-12-21 15:19:24,636 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 69 predicate places. [2021-12-21 15:19:24,636 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 257 transitions, 2930 flow [2021-12-21 15:19:24,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:24,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:24,637 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] [2021-12-21 15:19:24,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 15:19:24,638 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash -196373240, now seen corresponding path program 16 times [2021-12-21 15:19:24,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:24,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821494722] [2021-12-21 15:19:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:24,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:24,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:24,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821494722] [2021-12-21 15:19:24,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821494722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:24,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:24,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:19:24,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119535421] [2021-12-21 15:19:24,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:24,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:19:24,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:19:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:19:24,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:24,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 257 transitions, 2930 flow. Second operand has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:24,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:24,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:24,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:25,194 INFO L129 PetriNetUnfolder]: 450/1698 cut-off events. [2021-12-21 15:19:25,194 INFO L130 PetriNetUnfolder]: For 18470/18851 co-relation queries the response was YES. [2021-12-21 15:19:25,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8855 conditions, 1698 events. 450/1698 cut-off events. For 18470/18851 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 13201 event pairs, 62 based on Foata normal form. 161/1791 useless extension candidates. Maximal degree in co-relation 6644. Up to 324 conditions per place. [2021-12-21 15:19:25,207 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 69 selfloop transitions, 130 changer transitions 19/313 dead transitions. [2021-12-21 15:19:25,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 313 transitions, 3847 flow [2021-12-21 15:19:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 15:19:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-21 15:19:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1567 transitions. [2021-12-21 15:19:25,209 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7882293762575453 [2021-12-21 15:19:25,209 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1567 transitions. [2021-12-21 15:19:25,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1567 transitions. [2021-12-21 15:19:25,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:25,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1567 transitions. [2021-12-21 15:19:25,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.92857142857143) internal successors, (1567), 14 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:25,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:25,215 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:25,215 INFO L186 Difference]: Start difference. First operand has 205 places, 257 transitions, 2930 flow. Second operand 14 states and 1567 transitions. [2021-12-21 15:19:25,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 313 transitions, 3847 flow [2021-12-21 15:19:25,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 313 transitions, 3712 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-12-21 15:19:25,260 INFO L242 Difference]: Finished difference. Result has 214 places, 251 transitions, 2951 flow [2021-12-21 15:19:25,261 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2951, PETRI_PLACES=214, PETRI_TRANSITIONS=251} [2021-12-21 15:19:25,261 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 78 predicate places. [2021-12-21 15:19:25,262 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 251 transitions, 2951 flow [2021-12-21 15:19:25,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:25,262 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:25,262 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] [2021-12-21 15:19:25,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 15:19:25,263 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1887506384, now seen corresponding path program 17 times [2021-12-21 15:19:25,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:25,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322875929] [2021-12-21 15:19:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:25,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:25,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:25,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322875929] [2021-12-21 15:19:25,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322875929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:25,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:25,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 15:19:25,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789668952] [2021-12-21 15:19:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:25,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:19:25,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:19:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 15:19:25,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:25,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 251 transitions, 2951 flow. Second operand has 9 states, 9 states have (on average 106.77777777777777) internal successors, (961), 9 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:25,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:25,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:25,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:25,875 INFO L129 PetriNetUnfolder]: 90/511 cut-off events. [2021-12-21 15:19:25,876 INFO L130 PetriNetUnfolder]: For 6033/6191 co-relation queries the response was YES. [2021-12-21 15:19:25,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2920 conditions, 511 events. 90/511 cut-off events. For 6033/6191 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2638 event pairs, 5 based on Foata normal form. 110/616 useless extension candidates. Maximal degree in co-relation 2475. Up to 113 conditions per place. [2021-12-21 15:19:25,879 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 40 selfloop transitions, 29 changer transitions 53/214 dead transitions. [2021-12-21 15:19:25,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 214 transitions, 2320 flow [2021-12-21 15:19:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:19:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:19:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1113 transitions. [2021-12-21 15:19:25,881 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7838028169014084 [2021-12-21 15:19:25,881 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1113 transitions. [2021-12-21 15:19:25,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1113 transitions. [2021-12-21 15:19:25,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:25,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1113 transitions. [2021-12-21 15:19:25,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:25,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:25,885 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:25,885 INFO L186 Difference]: Start difference. First operand has 214 places, 251 transitions, 2951 flow. Second operand 10 states and 1113 transitions. [2021-12-21 15:19:25,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 214 transitions, 2320 flow [2021-12-21 15:19:25,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 214 transitions, 2057 flow, removed 27 selfloop flow, removed 16 redundant places. [2021-12-21 15:19:25,905 INFO L242 Difference]: Finished difference. Result has 207 places, 149 transitions, 899 flow [2021-12-21 15:19:25,905 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=899, PETRI_PLACES=207, PETRI_TRANSITIONS=149} [2021-12-21 15:19:25,906 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 71 predicate places. [2021-12-21 15:19:25,906 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 149 transitions, 899 flow [2021-12-21 15:19:25,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 106.77777777777777) internal successors, (961), 9 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:25,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:25,907 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] [2021-12-21 15:19:25,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 15:19:25,908 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 320186320, now seen corresponding path program 18 times [2021-12-21 15:19:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208213683] [2021-12-21 15:19:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:25,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:26,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208213683] [2021-12-21 15:19:26,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208213683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:26,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:26,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 15:19:26,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461029258] [2021-12-21 15:19:26,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:26,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:19:26,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:19:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:19:26,019 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:26,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 149 transitions, 899 flow. Second operand has 10 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:26,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:26,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:26,176 INFO L129 PetriNetUnfolder]: 23/217 cut-off events. [2021-12-21 15:19:26,177 INFO L130 PetriNetUnfolder]: For 1494/1510 co-relation queries the response was YES. [2021-12-21 15:19:26,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 217 events. 23/217 cut-off events. For 1494/1510 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 437 event pairs, 3 based on Foata normal form. 12/228 useless extension candidates. Maximal degree in co-relation 698. Up to 29 conditions per place. [2021-12-21 15:19:26,179 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 33 selfloop transitions, 21 changer transitions 12/158 dead transitions. [2021-12-21 15:19:26,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 158 transitions, 1091 flow [2021-12-21 15:19:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:19:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:19:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1089 transitions. [2021-12-21 15:19:26,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7669014084507042 [2021-12-21 15:19:26,181 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1089 transitions. [2021-12-21 15:19:26,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1089 transitions. [2021-12-21 15:19:26,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:26,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1089 transitions. [2021-12-21 15:19:26,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.9) internal successors, (1089), 10 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:26,185 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 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) [2021-12-21 15:19:26,185 INFO L186 Difference]: Start difference. First operand has 207 places, 149 transitions, 899 flow. Second operand 10 states and 1089 transitions. [2021-12-21 15:19:26,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 158 transitions, 1091 flow [2021-12-21 15:19:26,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 158 transitions, 814 flow, removed 34 selfloop flow, removed 31 redundant places. [2021-12-21 15:19:26,192 INFO L242 Difference]: Finished difference. Result has 177 places, 137 transitions, 560 flow [2021-12-21 15:19:26,192 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=560, PETRI_PLACES=177, PETRI_TRANSITIONS=137} [2021-12-21 15:19:26,193 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, 41 predicate places. [2021-12-21 15:19:26,193 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 137 transitions, 560 flow [2021-12-21 15:19:26,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,194 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:26,194 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:26,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 15:19:26,194 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-21 15:19:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 309151368, now seen corresponding path program 19 times [2021-12-21 15:19:26,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:26,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925093363] [2021-12-21 15:19:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:26,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:26,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925093363] [2021-12-21 15:19:26,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925093363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:26,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:26,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 15:19:26,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257855347] [2021-12-21 15:19:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:26,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 15:19:26,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 15:19:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 15:19:26,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 142 [2021-12-21 15:19:26,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 137 transitions, 560 flow. Second operand has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:26,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 142 [2021-12-21 15:19:26,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:26,425 INFO L129 PetriNetUnfolder]: 14/136 cut-off events. [2021-12-21 15:19:26,426 INFO L130 PetriNetUnfolder]: For 409/413 co-relation queries the response was YES. [2021-12-21 15:19:26,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 136 events. 14/136 cut-off events. For 409/413 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 172 event pairs, 1 based on Foata normal form. 3/138 useless extension candidates. Maximal degree in co-relation 420. Up to 18 conditions per place. [2021-12-21 15:19:26,427 INFO L132 encePairwiseOnDemand]: 132/142 looper letters, 0 selfloop transitions, 0 changer transitions 116/116 dead transitions. [2021-12-21 15:19:26,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 116 transitions, 597 flow [2021-12-21 15:19:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 15:19:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-21 15:19:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1275 transitions. [2021-12-21 15:19:26,429 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7482394366197183 [2021-12-21 15:19:26,429 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1275 transitions. [2021-12-21 15:19:26,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1275 transitions. [2021-12-21 15:19:26,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:26,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1275 transitions. [2021-12-21 15:19:26,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.25) internal successors, (1275), 12 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,434 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,434 INFO L186 Difference]: Start difference. First operand has 177 places, 137 transitions, 560 flow. Second operand 12 states and 1275 transitions. [2021-12-21 15:19:26,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 116 transitions, 597 flow [2021-12-21 15:19:26,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 116 transitions, 481 flow, removed 3 selfloop flow, removed 26 redundant places. [2021-12-21 15:19:26,438 INFO L242 Difference]: Finished difference. Result has 134 places, 0 transitions, 0 flow [2021-12-21 15:19:26,438 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=134, PETRI_TRANSITIONS=0} [2021-12-21 15:19:26,439 INFO L334 CegarLoopForPetriNet]: 136 programPoint places, -2 predicate places. [2021-12-21 15:19:26,439 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 0 transitions, 0 flow [2021-12-21 15:19:26,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:26,443 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-12-21 15:19:26,443 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2021-12-21 15:19:26,443 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2021-12-21 15:19:26,444 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2021-12-21 15:19:26,444 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2021-12-21 15:19:26,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 15:19:26,447 INFO L732 BasicCegarLoop]: Path program histogram: [19] [2021-12-21 15:19:26,449 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-21 15:19:26,449 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 15:19:26,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 03:19:26 BasicIcfg [2021-12-21 15:19:26,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 15:19:26,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 15:19:26,454 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 15:19:26,454 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 15:19:26,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:19:07" (3/4) ... [2021-12-21 15:19:26,457 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-21 15:19:26,462 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-21 15:19:26,462 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-21 15:19:26,462 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-12-21 15:19:26,462 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread4 [2021-12-21 15:19:26,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2021-12-21 15:19:26,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-21 15:19:26,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-21 15:19:26,470 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-21 15:19:26,509 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 15:19:26,509 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 15:19:26,510 INFO L158 Benchmark]: Toolchain (without parser) took 19725.76ms. Allocated memory was 104.9MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 76.4MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 632.9MB. Max. memory is 16.1GB. [2021-12-21 15:19:26,510 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 104.9MB. Free memory is still 61.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 15:19:26,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.59ms. Allocated memory is still 104.9MB. Free memory was 76.3MB in the beginning and 77.3MB in the end (delta: -1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 15:19:26,511 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.90ms. Allocated memory is still 104.9MB. Free memory was 77.3MB in the beginning and 75.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 15:19:26,511 INFO L158 Benchmark]: Boogie Preprocessor took 30.00ms. Allocated memory is still 104.9MB. Free memory was 75.2MB in the beginning and 74.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 15:19:26,511 INFO L158 Benchmark]: RCFGBuilder took 469.72ms. Allocated memory is still 104.9MB. Free memory was 73.8MB in the beginning and 54.7MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-21 15:19:26,511 INFO L158 Benchmark]: TraceAbstraction took 18899.86ms. Allocated memory was 104.9MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 54.4MB in the beginning and 1.6GB in the end (delta: -1.6GB). Peak memory consumption was 609.5MB. Max. memory is 16.1GB. [2021-12-21 15:19:26,512 INFO L158 Benchmark]: Witness Printer took 55.47ms. Allocated memory is still 2.3GB. Free memory was 1.6GB in the beginning and 1.6GB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 15:19:26,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 104.9MB. Free memory is still 61.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.59ms. Allocated memory is still 104.9MB. Free memory was 76.3MB in the beginning and 77.3MB in the end (delta: -1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.90ms. Allocated memory is still 104.9MB. Free memory was 77.3MB in the beginning and 75.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.00ms. Allocated memory is still 104.9MB. Free memory was 75.2MB in the beginning and 74.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 469.72ms. Allocated memory is still 104.9MB. Free memory was 73.8MB in the beginning and 54.7MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 18899.86ms. Allocated memory was 104.9MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 54.4MB in the beginning and 1.6GB in the end (delta: -1.6GB). Peak memory consumption was 609.5MB. Max. memory is 16.1GB. * Witness Printer took 55.47ms. Allocated memory is still 2.3GB. Free memory was 1.6GB in the beginning and 1.6GB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 146]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 174 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.7s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 14.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1215 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1215 mSDsluCounter, 914 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1915 mSDsCounter, 612 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5106 IncrementalHoareTripleChecker+Invalid, 5718 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 612 mSolverCounterUnsat, 268 mSDtfsCounter, 5106 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3080occurred in iteration=11, InterpolantAutomatonStates: 203, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 2299 NumberOfCodeBlocks, 2299 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 2280 ConstructedInterpolants, 0 QuantifiedInterpolants, 6612 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-21 15:19:26,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE