./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:05:55,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:05:55,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:05:55,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:05:55,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:05:55,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:05:55,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:05:55,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:05:55,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:05:55,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:05:55,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:05:55,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:05:55,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:05:55,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:05:55,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:05:55,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:05:55,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:05:55,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:05:55,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:05:55,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:05:55,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:05:55,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:05:55,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:05:55,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:05:55,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:05:55,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:05:55,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:05:55,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:05:55,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:05:55,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:05:55,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:05:55,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:05:55,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:05:55,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:05:55,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:05:55,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:05:55,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:05:55,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:05:55,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:05:55,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:05:55,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:05:55,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:05:55,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:05:55,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:05:55,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:05:55,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:05:55,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:05:55,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:05:55,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:05:55,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:05:55,365 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:05:55,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:05:55,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:05:55,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:05:55,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:05:55,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:05:55,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:05:55,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:05:55,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:05:55,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:05:55,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:05:55,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:05:55,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:05:55,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:05:55,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:05:55,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:05:55,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:05:55,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:05:55,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:05:55,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:05:55,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:05:55,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:05:55,371 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:05:55,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:05:55,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:05:55,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:05:55,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2021-12-16 03:05:55,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:05:55,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:05:55,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:05:55,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:05:55,665 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:05:55,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2021-12-16 03:05:55,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e697738/3dedb2df3150408fa65d290af5c8c01a/FLAG3b9f35b81 [2021-12-16 03:05:56,137 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:05:56,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2021-12-16 03:05:56,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e697738/3dedb2df3150408fa65d290af5c8c01a/FLAG3b9f35b81 [2021-12-16 03:05:56,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e697738/3dedb2df3150408fa65d290af5c8c01a [2021-12-16 03:05:56,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:05:56,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:05:56,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:05:56,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:05:56,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:05:56,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122aabac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56, skipping insertion in model container [2021-12-16 03:05:56,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:05:56,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:05:56,771 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2021-12-16 03:05:56,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:05:56,778 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:05:56,798 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2021-12-16 03:05:56,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:05:56,810 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:05:56,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56 WrapperNode [2021-12-16 03:05:56,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:05:56,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:05:56,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:05:56,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:05:56,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,836 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2021-12-16 03:05:56,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:05:56,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:05:56,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:05:56,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:05:56,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:05:56,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:05:56,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:05:56,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:05:56,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (1/1) ... [2021-12-16 03:05:56,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:05:56,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:56,888 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) [2021-12-16 03:05:56,908 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 [2021-12-16 03:05:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:05:56,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:05:56,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:05:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:05:56,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:05:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:05:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:05:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:05:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:05:56,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:05:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:05:56,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:05:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:05:56,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:05:56,917 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:05:56,990 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:05:56,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:05:57,162 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:05:57,201 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:05:57,207 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 03:05:57,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:05:57 BoogieIcfgContainer [2021-12-16 03:05:57,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:05:57,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:05:57,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:05:57,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:05:57,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:05:56" (1/3) ... [2021-12-16 03:05:57,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fe9763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:05:57, skipping insertion in model container [2021-12-16 03:05:57,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:05:56" (2/3) ... [2021-12-16 03:05:57,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fe9763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:05:57, skipping insertion in model container [2021-12-16 03:05:57,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:05:57" (3/3) ... [2021-12-16 03:05:57,216 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2021-12-16 03:05:57,219 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:05:57,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:05:57,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:05:57,220 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:05:57,267 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,267 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,267 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,268 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,269 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,270 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,270 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,272 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,273 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,273 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,276 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,279 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,279 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,279 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,280 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,280 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,280 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,285 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,285 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,285 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,286 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,288 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,288 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,289 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,290 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:05:57,296 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:05:57,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:05:57,358 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 [2021-12-16 03:05:57,359 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:05:57,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2021-12-16 03:05:57,456 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2021-12-16 03:05:57,459 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:05:57,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2021-12-16 03:05:57,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2021-12-16 03:05:57,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2021-12-16 03:05:57,492 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2021-12-16 03:05:57,500 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:05:57,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:57,513 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] [2021-12-16 03:05:57,514 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1603327647, now seen corresponding path program 1 times [2021-12-16 03:05:57,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:57,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370516928] [2021-12-16 03:05:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:57,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:57,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:57,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370516928] [2021-12-16 03:05:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370516928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:57,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:05:57,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:05:57,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563457143] [2021-12-16 03:05:57,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:57,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:05:57,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:05:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:05:57,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2021-12-16 03:05:57,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:57,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:57,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2021-12-16 03:05:57,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:57,894 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2021-12-16 03:05:57,894 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-12-16 03:05:57,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2021-12-16 03:05:57,896 INFO L132 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2021-12-16 03:05:57,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2021-12-16 03:05:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:05:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:05:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2021-12-16 03:05:57,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2021-12-16 03:05:57,918 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2021-12-16 03:05:57,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2021-12-16 03:05:57,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:57,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2021-12-16 03:05:57,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:57,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:57,936 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:57,938 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2021-12-16 03:05:57,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2021-12-16 03:05:57,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:05:57,950 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2021-12-16 03:05:57,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-12-16 03:05:57,956 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2021-12-16 03:05:57,956 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2021-12-16 03:05:57,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:57,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:57,956 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] [2021-12-16 03:05:57,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:05:57,957 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2021-12-16 03:05:57,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:57,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128486063] [2021-12-16 03:05:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:57,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:58,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:58,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128486063] [2021-12-16 03:05:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128486063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:58,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:05:58,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:05:58,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408811657] [2021-12-16 03:05:58,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:58,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:05:58,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:05:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:05:58,113 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-16 03:05:58,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:58,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:58,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-16 03:05:58,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:58,199 INFO L129 PetriNetUnfolder]: 8/111 cut-off events. [2021-12-16 03:05:58,200 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-12-16 03:05:58,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2021-12-16 03:05:58,201 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2021-12-16 03:05:58,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2021-12-16 03:05:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:05:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:05:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2021-12-16 03:05:58,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2021-12-16 03:05:58,205 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2021-12-16 03:05:58,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2021-12-16 03:05:58,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:58,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2021-12-16 03:05:58,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:58,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:58,209 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:58,209 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2021-12-16 03:05:58,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2021-12-16 03:05:58,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:05:58,212 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2021-12-16 03:05:58,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2021-12-16 03:05:58,213 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2021-12-16 03:05:58,214 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2021-12-16 03:05:58,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:58,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:58,217 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] [2021-12-16 03:05:58,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:05:58,218 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash -824748536, now seen corresponding path program 1 times [2021-12-16 03:05:58,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:58,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421799937] [2021-12-16 03:05:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:58,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:58,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421799937] [2021-12-16 03:05:58,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421799937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:58,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320008485] [2021-12-16 03:05:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:58,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:58,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:58,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:05:58,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:05:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:05:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:05:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:58,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:05:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:59,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320008485] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:59,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:05:59,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2021-12-16 03:05:59,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27061971] [2021-12-16 03:05:59,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:59,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:05:59,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:05:59,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:05:59,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2021-12-16 03:05:59,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:59,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2021-12-16 03:05:59,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:59,134 INFO L129 PetriNetUnfolder]: 42/189 cut-off events. [2021-12-16 03:05:59,134 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-16 03:05:59,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 189 events. 42/189 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 706 event pairs, 12 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 300. Up to 38 conditions per place. [2021-12-16 03:05:59,137 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 5 changer transitions 3/83 dead transitions. [2021-12-16 03:05:59,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 242 flow [2021-12-16 03:05:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:05:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-16 03:05:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2021-12-16 03:05:59,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2021-12-16 03:05:59,140 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2021-12-16 03:05:59,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2021-12-16 03:05:59,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:59,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2021-12-16 03:05:59,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,144 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,145 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 4 states and 299 transitions. [2021-12-16 03:05:59,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 242 flow [2021-12-16 03:05:59,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 236 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-16 03:05:59,147 INFO L242 Difference]: Finished difference. Result has 80 places, 75 transitions, 192 flow [2021-12-16 03:05:59,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2021-12-16 03:05:59,150 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2021-12-16 03:05:59,150 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 192 flow [2021-12-16 03:05:59,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:59,151 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] [2021-12-16 03:05:59,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 03:05:59,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:59,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 565393570, now seen corresponding path program 2 times [2021-12-16 03:05:59,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420950175] [2021-12-16 03:05:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:59,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:59,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:59,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420950175] [2021-12-16 03:05:59,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420950175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:59,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:05:59,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:05:59,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2415745] [2021-12-16 03:05:59,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:59,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:05:59,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:59,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:05:59,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:05:59,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-16 03:05:59,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:59,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-16 03:05:59,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:59,640 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2021-12-16 03:05:59,640 INFO L130 PetriNetUnfolder]: For 115/124 co-relation queries the response was YES. [2021-12-16 03:05:59,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 313 events. 85/313 cut-off events. For 115/124 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1507 event pairs, 28 based on Foata normal form. 7/313 useless extension candidates. Maximal degree in co-relation 637. Up to 107 conditions per place. [2021-12-16 03:05:59,643 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 38 selfloop transitions, 8 changer transitions 11/111 dead transitions. [2021-12-16 03:05:59,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 438 flow [2021-12-16 03:05:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:05:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:05:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2021-12-16 03:05:59,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8448275862068966 [2021-12-16 03:05:59,645 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2021-12-16 03:05:59,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2021-12-16 03:05:59,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:59,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2021-12-16 03:05:59,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,649 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,649 INFO L186 Difference]: Start difference. First operand has 80 places, 75 transitions, 192 flow. Second operand 6 states and 441 transitions. [2021-12-16 03:05:59,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 438 flow [2021-12-16 03:05:59,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:05:59,653 INFO L242 Difference]: Finished difference. Result has 89 places, 82 transitions, 268 flow [2021-12-16 03:05:59,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2021-12-16 03:05:59,654 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2021-12-16 03:05:59,654 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 268 flow [2021-12-16 03:05:59,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:59,655 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] [2021-12-16 03:05:59,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:05:59,655 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:05:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:05:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1895955256, now seen corresponding path program 3 times [2021-12-16 03:05:59,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:05:59,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912573740] [2021-12-16 03:05:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:05:59,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:05:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:05:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:59,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:05:59,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912573740] [2021-12-16 03:05:59,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912573740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:05:59,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909743569] [2021-12-16 03:05:59,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:05:59,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:05:59,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:05:59,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:05:59,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:05:59,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 03:05:59,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:05:59,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:05:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:05:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:05:59,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:05:59,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909743569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:05:59,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:05:59,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-12-16 03:05:59,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792535679] [2021-12-16 03:05:59,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:05:59,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:05:59,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:05:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:05:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:05:59,941 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2021-12-16 03:05:59,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 82 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:05:59,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2021-12-16 03:05:59,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:05:59,986 INFO L129 PetriNetUnfolder]: 60/276 cut-off events. [2021-12-16 03:05:59,986 INFO L130 PetriNetUnfolder]: For 237/243 co-relation queries the response was YES. [2021-12-16 03:05:59,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 276 events. 60/276 cut-off events. For 237/243 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1196 event pairs, 17 based on Foata normal form. 8/275 useless extension candidates. Maximal degree in co-relation 631. Up to 62 conditions per place. [2021-12-16 03:05:59,988 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 25 selfloop transitions, 10 changer transitions 2/96 dead transitions. [2021-12-16 03:05:59,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 407 flow [2021-12-16 03:05:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:05:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-16 03:05:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 301 transitions. [2021-12-16 03:05:59,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8649425287356322 [2021-12-16 03:05:59,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 301 transitions. [2021-12-16 03:05:59,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 301 transitions. [2021-12-16 03:05:59,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:05:59,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 301 transitions. [2021-12-16 03:05:59,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,991 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,992 INFO L186 Difference]: Start difference. First operand has 89 places, 82 transitions, 268 flow. Second operand 4 states and 301 transitions. [2021-12-16 03:05:59,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 407 flow [2021-12-16 03:05:59,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 403 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-16 03:05:59,995 INFO L242 Difference]: Finished difference. Result has 92 places, 84 transitions, 319 flow [2021-12-16 03:05:59,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2021-12-16 03:05:59,996 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2021-12-16 03:05:59,996 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 319 flow [2021-12-16 03:05:59,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:05:59,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:05:59,996 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] [2021-12-16 03:06:00,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:06:00,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:00,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:00,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1098148480, now seen corresponding path program 4 times [2021-12-16 03:06:00,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:00,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362335558] [2021-12-16 03:06:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:00,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:00,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:00,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362335558] [2021-12-16 03:06:00,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362335558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:06:00,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:06:00,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:06:00,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446816585] [2021-12-16 03:06:00,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:06:00,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:06:00,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:06:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:06:00,263 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-16 03:06:00,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:00,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-16 03:06:00,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:00,374 INFO L129 PetriNetUnfolder]: 108/345 cut-off events. [2021-12-16 03:06:00,374 INFO L130 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2021-12-16 03:06:00,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 345 events. 108/345 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1443 event pairs, 36 based on Foata normal form. 1/339 useless extension candidates. Maximal degree in co-relation 978. Up to 112 conditions per place. [2021-12-16 03:06:00,378 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 41 selfloop transitions, 9 changer transitions 1/105 dead transitions. [2021-12-16 03:06:00,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 105 transitions, 538 flow [2021-12-16 03:06:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:06:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:06:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2021-12-16 03:06:00,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8344827586206897 [2021-12-16 03:06:00,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2021-12-16 03:06:00,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2021-12-16 03:06:00,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:00,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2021-12-16 03:06:00,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,382 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,382 INFO L186 Difference]: Start difference. First operand has 92 places, 84 transitions, 319 flow. Second operand 5 states and 363 transitions. [2021-12-16 03:06:00,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 105 transitions, 538 flow [2021-12-16 03:06:00,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 519 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-12-16 03:06:00,387 INFO L242 Difference]: Finished difference. Result has 96 places, 87 transitions, 362 flow [2021-12-16 03:06:00,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2021-12-16 03:06:00,389 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 19 predicate places. [2021-12-16 03:06:00,389 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 362 flow [2021-12-16 03:06:00,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,390 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:00,390 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] [2021-12-16 03:06:00,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:06:00,390 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:00,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1132170860, now seen corresponding path program 5 times [2021-12-16 03:06:00,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875651078] [2021-12-16 03:06:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:00,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:00,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:00,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875651078] [2021-12-16 03:06:00,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875651078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:06:00,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:06:00,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:06:00,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939790984] [2021-12-16 03:06:00,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:06:00,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:06:00,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:00,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:06:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:06:00,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-16 03:06:00,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:00,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-16 03:06:00,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:00,542 INFO L129 PetriNetUnfolder]: 107/318 cut-off events. [2021-12-16 03:06:00,543 INFO L130 PetriNetUnfolder]: For 639/641 co-relation queries the response was YES. [2021-12-16 03:06:00,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 318 events. 107/318 cut-off events. For 639/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1255 event pairs, 37 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 966. Up to 111 conditions per place. [2021-12-16 03:06:00,545 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 32 selfloop transitions, 9 changer transitions 2/97 dead transitions. [2021-12-16 03:06:00,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 500 flow [2021-12-16 03:06:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:06:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:06:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 420 transitions. [2021-12-16 03:06:00,547 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8045977011494253 [2021-12-16 03:06:00,547 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 420 transitions. [2021-12-16 03:06:00,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 420 transitions. [2021-12-16 03:06:00,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:00,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 420 transitions. [2021-12-16 03:06:00,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,549 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,549 INFO L186 Difference]: Start difference. First operand has 96 places, 87 transitions, 362 flow. Second operand 6 states and 420 transitions. [2021-12-16 03:06:00,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 500 flow [2021-12-16 03:06:00,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 489 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-16 03:06:00,554 INFO L242 Difference]: Finished difference. Result has 101 places, 87 transitions, 382 flow [2021-12-16 03:06:00,554 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2021-12-16 03:06:00,555 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2021-12-16 03:06:00,555 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 382 flow [2021-12-16 03:06:00,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:00,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:00,556 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:00,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 03:06:00,556 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1603200416, now seen corresponding path program 1 times [2021-12-16 03:06:00,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:00,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772928291] [2021-12-16 03:06:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:00,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:00,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:00,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772928291] [2021-12-16 03:06:00,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772928291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:00,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204521101] [2021-12-16 03:06:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:00,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:00,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:00,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:00,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:06:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 03:06:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:06:00,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:06:01,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204521101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:01,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:01,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2021-12-16 03:06:01,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100141357] [2021-12-16 03:06:01,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:01,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 03:06:01,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 03:06:01,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:06:01,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:01,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 382 flow. Second operand has 9 states, 9 states have (on average 66.88888888888889) internal successors, (602), 9 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:01,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:01,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:01,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:01,190 INFO L129 PetriNetUnfolder]: 51/339 cut-off events. [2021-12-16 03:06:01,190 INFO L130 PetriNetUnfolder]: For 641/663 co-relation queries the response was YES. [2021-12-16 03:06:01,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 339 events. 51/339 cut-off events. For 641/663 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1582 event pairs, 12 based on Foata normal form. 11/345 useless extension candidates. Maximal degree in co-relation 829. Up to 48 conditions per place. [2021-12-16 03:06:01,193 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 22 selfloop transitions, 7 changer transitions 5/103 dead transitions. [2021-12-16 03:06:01,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 103 transitions, 494 flow [2021-12-16 03:06:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:06:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:06:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2021-12-16 03:06:01,194 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2021-12-16 03:06:01,195 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2021-12-16 03:06:01,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2021-12-16 03:06:01,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:01,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2021-12-16 03:06:01,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:01,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:01,198 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:01,198 INFO L186 Difference]: Start difference. First operand has 101 places, 87 transitions, 382 flow. Second operand 7 states and 476 transitions. [2021-12-16 03:06:01,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 103 transitions, 494 flow [2021-12-16 03:06:01,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 472 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-16 03:06:01,203 INFO L242 Difference]: Finished difference. Result has 104 places, 90 transitions, 408 flow [2021-12-16 03:06:01,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=104, PETRI_TRANSITIONS=90} [2021-12-16 03:06:01,206 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 27 predicate places. [2021-12-16 03:06:01,206 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 90 transitions, 408 flow [2021-12-16 03:06:01,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 66.88888888888889) internal successors, (602), 9 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:01,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:01,207 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:01,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 03:06:01,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:01,431 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash 47133748, now seen corresponding path program 2 times [2021-12-16 03:06:01,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:01,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258430480] [2021-12-16 03:06:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:01,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:01,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258430480] [2021-12-16 03:06:01,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258430480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:01,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083943196] [2021-12-16 03:06:01,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:06:01,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:01,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:01,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:06:01,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:06:01,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:01,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:01,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:02,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083943196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:02,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:02,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-16 03:06:02,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534557681] [2021-12-16 03:06:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 03:06:02,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 03:06:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:06:02,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:02,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 90 transitions, 408 flow. Second operand has 17 states, 17 states have (on average 65.3529411764706) internal successors, (1111), 17 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:02,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:02,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:02,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:02,732 INFO L129 PetriNetUnfolder]: 338/973 cut-off events. [2021-12-16 03:06:02,732 INFO L130 PetriNetUnfolder]: For 2040/2046 co-relation queries the response was YES. [2021-12-16 03:06:02,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3051 conditions, 973 events. 338/973 cut-off events. For 2040/2046 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5895 event pairs, 53 based on Foata normal form. 5/976 useless extension candidates. Maximal degree in co-relation 3031. Up to 170 conditions per place. [2021-12-16 03:06:02,741 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 83 selfloop transitions, 44 changer transitions 9/190 dead transitions. [2021-12-16 03:06:02,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 190 transitions, 1295 flow [2021-12-16 03:06:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 03:06:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-16 03:06:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1556 transitions. [2021-12-16 03:06:02,746 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7776111944027986 [2021-12-16 03:06:02,746 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1556 transitions. [2021-12-16 03:06:02,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1556 transitions. [2021-12-16 03:06:02,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:02,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1556 transitions. [2021-12-16 03:06:02,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.65217391304348) internal successors, (1556), 23 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:02,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:02,756 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:02,756 INFO L186 Difference]: Start difference. First operand has 104 places, 90 transitions, 408 flow. Second operand 23 states and 1556 transitions. [2021-12-16 03:06:02,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 190 transitions, 1295 flow [2021-12-16 03:06:02,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 190 transitions, 1269 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-12-16 03:06:02,764 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 819 flow [2021-12-16 03:06:02,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=819, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2021-12-16 03:06:02,765 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 58 predicate places. [2021-12-16 03:06:02,765 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 819 flow [2021-12-16 03:06:02,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.3529411764706) internal successors, (1111), 17 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:02,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:02,766 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:02,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 03:06:02,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:02,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1281276886, now seen corresponding path program 3 times [2021-12-16 03:06:02,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491854639] [2021-12-16 03:06:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:03,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491854639] [2021-12-16 03:06:03,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491854639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434316162] [2021-12-16 03:06:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:06:03,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:03,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:03,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:06:03,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 03:06:03,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:03,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434316162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:03,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:03,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-16 03:06:03,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987346943] [2021-12-16 03:06:03,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:03,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 03:06:03,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 03:06:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:06:03,442 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:03,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 819 flow. Second operand has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:03,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:03,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:03,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:04,569 INFO L129 PetriNetUnfolder]: 500/1258 cut-off events. [2021-12-16 03:06:04,570 INFO L130 PetriNetUnfolder]: For 5753/5759 co-relation queries the response was YES. [2021-12-16 03:06:04,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5405 conditions, 1258 events. 500/1258 cut-off events. For 5753/5759 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7651 event pairs, 8 based on Foata normal form. 21/1273 useless extension candidates. Maximal degree in co-relation 5373. Up to 203 conditions per place. [2021-12-16 03:06:04,581 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 129 selfloop transitions, 161 changer transitions 11/355 dead transitions. [2021-12-16 03:06:04,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 355 transitions, 3413 flow [2021-12-16 03:06:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 03:06:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-16 03:06:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3173 transitions. [2021-12-16 03:06:04,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7759843482514062 [2021-12-16 03:06:04,615 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3173 transitions. [2021-12-16 03:06:04,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3173 transitions. [2021-12-16 03:06:04,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:04,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3173 transitions. [2021-12-16 03:06:04,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.51063829787235) internal successors, (3173), 47 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:04,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:04,631 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:04,631 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 819 flow. Second operand 47 states and 3173 transitions. [2021-12-16 03:06:04,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 355 transitions, 3413 flow [2021-12-16 03:06:04,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 355 transitions, 3127 flow, removed 109 selfloop flow, removed 10 redundant places. [2021-12-16 03:06:04,651 INFO L242 Difference]: Finished difference. Result has 183 places, 249 transitions, 2281 flow [2021-12-16 03:06:04,652 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2281, PETRI_PLACES=183, PETRI_TRANSITIONS=249} [2021-12-16 03:06:04,652 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 106 predicate places. [2021-12-16 03:06:04,652 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 249 transitions, 2281 flow [2021-12-16 03:06:04,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.5) internal successors, (1048), 16 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:04,653 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:04,653 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:04,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:06:04,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 03:06:04,870 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash 862804126, now seen corresponding path program 4 times [2021-12-16 03:06:04,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:04,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622727141] [2021-12-16 03:06:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:04,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:04,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622727141] [2021-12-16 03:06:04,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622727141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652321056] [2021-12-16 03:06:04,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:06:04,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:04,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:04,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:06:05,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:06:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:05,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:05,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652321056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:05,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:05,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-16 03:06:05,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614371378] [2021-12-16 03:06:05,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:05,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:06:05,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:06:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:06:05,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:05,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 249 transitions, 2281 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:05,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:05,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:05,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:07,330 INFO L129 PetriNetUnfolder]: 705/1994 cut-off events. [2021-12-16 03:06:07,330 INFO L130 PetriNetUnfolder]: For 13756/13768 co-relation queries the response was YES. [2021-12-16 03:06:07,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9441 conditions, 1994 events. 705/1994 cut-off events. For 13756/13768 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15080 event pairs, 7 based on Foata normal form. 11/1998 useless extension candidates. Maximal degree in co-relation 9397. Up to 277 conditions per place. [2021-12-16 03:06:07,349 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 215 selfloop transitions, 261 changer transitions 36/566 dead transitions. [2021-12-16 03:06:07,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 566 transitions, 6596 flow [2021-12-16 03:06:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-16 03:06:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-12-16 03:06:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4777 transitions. [2021-12-16 03:06:07,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733527602395985 [2021-12-16 03:06:07,355 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4777 transitions. [2021-12-16 03:06:07,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4777 transitions. [2021-12-16 03:06:07,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:07,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4777 transitions. [2021-12-16 03:06:07,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 67.28169014084507) internal successors, (4777), 71 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:07,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:07,402 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 87.0) internal successors, (6264), 72 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:07,402 INFO L186 Difference]: Start difference. First operand has 183 places, 249 transitions, 2281 flow. Second operand 71 states and 4777 transitions. [2021-12-16 03:06:07,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 566 transitions, 6596 flow [2021-12-16 03:06:07,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 566 transitions, 6076 flow, removed 185 selfloop flow, removed 2 redundant places. [2021-12-16 03:06:07,455 INFO L242 Difference]: Finished difference. Result has 275 places, 401 transitions, 4365 flow [2021-12-16 03:06:07,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4365, PETRI_PLACES=275, PETRI_TRANSITIONS=401} [2021-12-16 03:06:07,456 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 198 predicate places. [2021-12-16 03:06:07,456 INFO L470 AbstractCegarLoop]: Abstraction has has 275 places, 401 transitions, 4365 flow [2021-12-16 03:06:07,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:07,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:07,457 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:07,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 03:06:07,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:07,674 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash 701945810, now seen corresponding path program 5 times [2021-12-16 03:06:07,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:07,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618983286] [2021-12-16 03:06:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:07,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:07,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:07,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618983286] [2021-12-16 03:06:07,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618983286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:07,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904396159] [2021-12-16 03:06:07,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:06:07,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:07,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:07,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:07,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:06:07,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-16 03:06:07,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:07,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:08,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:08,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904396159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:08,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:08,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-16 03:06:08,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893328570] [2021-12-16 03:06:08,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:08,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:06:08,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:06:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:06:08,257 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:08,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 401 transitions, 4365 flow. Second operand has 18 states, 18 states have (on average 65.61111111111111) internal successors, (1181), 18 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:08,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:08,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:08,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:10,234 INFO L129 PetriNetUnfolder]: 999/2700 cut-off events. [2021-12-16 03:06:10,234 INFO L130 PetriNetUnfolder]: For 45466/45482 co-relation queries the response was YES. [2021-12-16 03:06:10,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15698 conditions, 2700 events. 999/2700 cut-off events. For 45466/45482 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 21494 event pairs, 26 based on Foata normal form. 33/2718 useless extension candidates. Maximal degree in co-relation 15629. Up to 321 conditions per place. [2021-12-16 03:06:10,284 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 219 selfloop transitions, 454 changer transitions 3/730 dead transitions. [2021-12-16 03:06:10,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 730 transitions, 9754 flow [2021-12-16 03:06:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 03:06:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-12-16 03:06:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4171 transitions. [2021-12-16 03:06:10,308 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7732665925101965 [2021-12-16 03:06:10,308 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4171 transitions. [2021-12-16 03:06:10,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4171 transitions. [2021-12-16 03:06:10,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:10,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4171 transitions. [2021-12-16 03:06:10,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.2741935483871) internal successors, (4171), 62 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:10,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:10,322 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:10,322 INFO L186 Difference]: Start difference. First operand has 275 places, 401 transitions, 4365 flow. Second operand 62 states and 4171 transitions. [2021-12-16 03:06:10,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 730 transitions, 9754 flow [2021-12-16 03:06:10,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 730 transitions, 8689 flow, removed 472 selfloop flow, removed 6 redundant places. [2021-12-16 03:06:10,545 INFO L242 Difference]: Finished difference. Result has 352 places, 627 transitions, 7638 flow [2021-12-16 03:06:10,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3755, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=7638, PETRI_PLACES=352, PETRI_TRANSITIONS=627} [2021-12-16 03:06:10,546 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 275 predicate places. [2021-12-16 03:06:10,546 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 627 transitions, 7638 flow [2021-12-16 03:06:10,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.61111111111111) internal successors, (1181), 18 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:10,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:10,547 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:10,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-16 03:06:10,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:10,764 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1474959396, now seen corresponding path program 6 times [2021-12-16 03:06:10,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:10,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11596133] [2021-12-16 03:06:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:10,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:10,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11596133] [2021-12-16 03:06:10,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11596133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612492062] [2021-12-16 03:06:10,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:06:10,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:10,911 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:10,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:06:10,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-16 03:06:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:10,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:11,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:11,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612492062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:11,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:11,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-16 03:06:11,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936701677] [2021-12-16 03:06:11,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:11,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 03:06:11,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 03:06:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-16 03:06:11,358 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:11,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 627 transitions, 7638 flow. Second operand has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:11,360 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:11,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:11,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:15,182 INFO L129 PetriNetUnfolder]: 1504/4123 cut-off events. [2021-12-16 03:06:15,183 INFO L130 PetriNetUnfolder]: For 71669/71686 co-relation queries the response was YES. [2021-12-16 03:06:15,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25336 conditions, 4123 events. 1504/4123 cut-off events. For 71669/71686 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 36693 event pairs, 30 based on Foata normal form. 36/4139 useless extension candidates. Maximal degree in co-relation 25242. Up to 539 conditions per place. [2021-12-16 03:06:15,250 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 249 selfloop transitions, 792 changer transitions 11/1106 dead transitions. [2021-12-16 03:06:15,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1106 transitions, 16140 flow [2021-12-16 03:06:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-16 03:06:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-12-16 03:06:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7221 transitions. [2021-12-16 03:06:15,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2021-12-16 03:06:15,257 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7221 transitions. [2021-12-16 03:06:15,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7221 transitions. [2021-12-16 03:06:15,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:15,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7221 transitions. [2021-12-16 03:06:15,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.86111111111111) internal successors, (7221), 108 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:15,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:15,282 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:15,282 INFO L186 Difference]: Start difference. First operand has 352 places, 627 transitions, 7638 flow. Second operand 108 states and 7221 transitions. [2021-12-16 03:06:15,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1106 transitions, 16140 flow [2021-12-16 03:06:15,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1106 transitions, 15399 flow, removed 241 selfloop flow, removed 12 redundant places. [2021-12-16 03:06:15,672 INFO L242 Difference]: Finished difference. Result has 481 places, 943 transitions, 13648 flow [2021-12-16 03:06:15,673 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=13648, PETRI_PLACES=481, PETRI_TRANSITIONS=943} [2021-12-16 03:06:15,673 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 404 predicate places. [2021-12-16 03:06:15,673 INFO L470 AbstractCegarLoop]: Abstraction has has 481 places, 943 transitions, 13648 flow [2021-12-16 03:06:15,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.3) internal successors, (1306), 20 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:15,674 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:15,674 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:15,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:06:15,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 03:06:15,888 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1298141610, now seen corresponding path program 7 times [2021-12-16 03:06:15,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971741927] [2021-12-16 03:06:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:15,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:16,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971741927] [2021-12-16 03:06:16,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971741927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446512761] [2021-12-16 03:06:16,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 03:06:16,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:16,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:16,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:06:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:16,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:16,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:16,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:16,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446512761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:16,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:16,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-16 03:06:16,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515436155] [2021-12-16 03:06:16,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:06:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:06:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:06:16,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:16,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 943 transitions, 13648 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:16,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:16,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:16,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:20,106 INFO L129 PetriNetUnfolder]: 2139/5877 cut-off events. [2021-12-16 03:06:20,107 INFO L130 PetriNetUnfolder]: For 118699/118718 co-relation queries the response was YES. [2021-12-16 03:06:20,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39474 conditions, 5877 events. 2139/5877 cut-off events. For 118699/118718 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 56932 event pairs, 46 based on Foata normal form. 36/5893 useless extension candidates. Maximal degree in co-relation 39350. Up to 745 conditions per place. [2021-12-16 03:06:20,233 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 276 selfloop transitions, 1205 changer transitions 6/1541 dead transitions. [2021-12-16 03:06:20,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 1541 transitions, 25815 flow [2021-12-16 03:06:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-16 03:06:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-12-16 03:06:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2021-12-16 03:06:20,239 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2021-12-16 03:06:20,239 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2021-12-16 03:06:20,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2021-12-16 03:06:20,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:20,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2021-12-16 03:06:20,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:20,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:20,256 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:20,256 INFO L186 Difference]: Start difference. First operand has 481 places, 943 transitions, 13648 flow. Second operand 79 states and 5263 transitions. [2021-12-16 03:06:20,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 1541 transitions, 25815 flow [2021-12-16 03:06:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1541 transitions, 24833 flow, removed 291 selfloop flow, removed 28 redundant places. [2021-12-16 03:06:21,466 INFO L242 Difference]: Finished difference. Result has 563 places, 1440 transitions, 24439 flow [2021-12-16 03:06:21,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=12969, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=24439, PETRI_PLACES=563, PETRI_TRANSITIONS=1440} [2021-12-16 03:06:21,468 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 486 predicate places. [2021-12-16 03:06:21,468 INFO L470 AbstractCegarLoop]: Abstraction has has 563 places, 1440 transitions, 24439 flow [2021-12-16 03:06:21,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:21,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:21,469 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:21,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 03:06:21,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 03:06:21,689 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash 262790282, now seen corresponding path program 8 times [2021-12-16 03:06:21,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:21,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895819053] [2021-12-16 03:06:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:21,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:21,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:21,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895819053] [2021-12-16 03:06:21,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895819053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:21,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661306749] [2021-12-16 03:06:21,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:06:21,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:21,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:21,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:21,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:06:21,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:06:21,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:21,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:22,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:22,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661306749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:22,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:22,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-16 03:06:22,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201774508] [2021-12-16 03:06:22,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:22,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:06:22,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:06:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:06:22,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:22,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1440 transitions, 24439 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:22,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:22,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:22,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:26,631 INFO L129 PetriNetUnfolder]: 2377/6444 cut-off events. [2021-12-16 03:06:26,634 INFO L130 PetriNetUnfolder]: For 144241/144260 co-relation queries the response was YES. [2021-12-16 03:06:26,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47180 conditions, 6444 events. 2377/6444 cut-off events. For 144241/144260 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 62256 event pairs, 389 based on Foata normal form. 15/6350 useless extension candidates. Maximal degree in co-relation 47025. Up to 1713 conditions per place. [2021-12-16 03:06:26,920 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 1113 selfloop transitions, 596 changer transitions 7/1770 dead transitions. [2021-12-16 03:06:26,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1770 transitions, 33214 flow [2021-12-16 03:06:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 03:06:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-16 03:06:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2758 transitions. [2021-12-16 03:06:26,925 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7731987664704233 [2021-12-16 03:06:26,926 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2758 transitions. [2021-12-16 03:06:26,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2758 transitions. [2021-12-16 03:06:26,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:26,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2758 transitions. [2021-12-16 03:06:26,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 67.26829268292683) internal successors, (2758), 41 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:26,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:26,954 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:26,954 INFO L186 Difference]: Start difference. First operand has 563 places, 1440 transitions, 24439 flow. Second operand 41 states and 2758 transitions. [2021-12-16 03:06:26,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1770 transitions, 33214 flow [2021-12-16 03:06:29,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 585 places, 1770 transitions, 32890 flow, removed 45 selfloop flow, removed 18 redundant places. [2021-12-16 03:06:29,265 INFO L242 Difference]: Finished difference. Result has 603 places, 1633 transitions, 29505 flow [2021-12-16 03:06:29,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=24202, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=29505, PETRI_PLACES=603, PETRI_TRANSITIONS=1633} [2021-12-16 03:06:29,268 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 526 predicate places. [2021-12-16 03:06:29,268 INFO L470 AbstractCegarLoop]: Abstraction has has 603 places, 1633 transitions, 29505 flow [2021-12-16 03:06:29,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:29,268 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:29,269 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:29,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 03:06:29,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 03:06:29,483 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1852369858, now seen corresponding path program 9 times [2021-12-16 03:06:29,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178359338] [2021-12-16 03:06:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:29,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:29,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178359338] [2021-12-16 03:06:29,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178359338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348222759] [2021-12-16 03:06:29,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:06:29,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:29,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:29,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:06:29,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 03:06:29,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:29,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:30,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348222759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:30,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:30,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-16 03:06:30,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308920916] [2021-12-16 03:06:30,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:30,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 03:06:30,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 03:06:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-16 03:06:30,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:30,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1633 transitions, 29505 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:30,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:30,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:30,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:34,166 INFO L129 PetriNetUnfolder]: 2413/6498 cut-off events. [2021-12-16 03:06:34,167 INFO L130 PetriNetUnfolder]: For 171930/171954 co-relation queries the response was YES. [2021-12-16 03:06:34,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51368 conditions, 6498 events. 2413/6498 cut-off events. For 171930/171954 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 62518 event pairs, 310 based on Foata normal form. 9/6385 useless extension candidates. Maximal degree in co-relation 51196. Up to 1723 conditions per place. [2021-12-16 03:06:34,381 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 897 selfloop transitions, 803 changer transitions 5/1759 dead transitions. [2021-12-16 03:06:34,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1759 transitions, 35381 flow [2021-12-16 03:06:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 03:06:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-16 03:06:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2295 transitions. [2021-12-16 03:06:34,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7758620689655172 [2021-12-16 03:06:34,384 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2295 transitions. [2021-12-16 03:06:34,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2295 transitions. [2021-12-16 03:06:34,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:34,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2295 transitions. [2021-12-16 03:06:34,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 67.5) internal successors, (2295), 34 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:34,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 87.0) internal successors, (3045), 35 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:34,389 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 87.0) internal successors, (3045), 35 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:34,389 INFO L186 Difference]: Start difference. First operand has 603 places, 1633 transitions, 29505 flow. Second operand 34 states and 2295 transitions. [2021-12-16 03:06:34,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1759 transitions, 35381 flow [2021-12-16 03:06:36,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 1759 transitions, 34982 flow, removed 150 selfloop flow, removed 11 redundant places. [2021-12-16 03:06:36,375 INFO L242 Difference]: Finished difference. Result has 633 places, 1685 transitions, 31869 flow [2021-12-16 03:06:36,376 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=29127, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=749, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=31869, PETRI_PLACES=633, PETRI_TRANSITIONS=1685} [2021-12-16 03:06:36,382 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 556 predicate places. [2021-12-16 03:06:36,382 INFO L470 AbstractCegarLoop]: Abstraction has has 633 places, 1685 transitions, 31869 flow [2021-12-16 03:06:36,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:36,382 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:36,383 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:36,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 03:06:36,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 03:06:36,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1361762118, now seen corresponding path program 10 times [2021-12-16 03:06:36,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:36,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331441616] [2021-12-16 03:06:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:36,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:36,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:36,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331441616] [2021-12-16 03:06:36,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331441616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:36,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298233894] [2021-12-16 03:06:36,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:06:36,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:36,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:36,729 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:36,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 03:06:36,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:06:36,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:06:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:36,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:37,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298233894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:37,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:37,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-16 03:06:37,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104194299] [2021-12-16 03:06:37,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:37,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 03:06:37,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 03:06:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-16 03:06:37,206 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:37,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1685 transitions, 31869 flow. Second operand has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:37,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:37,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:37,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:06:44,574 INFO L129 PetriNetUnfolder]: 3555/9571 cut-off events. [2021-12-16 03:06:44,574 INFO L130 PetriNetUnfolder]: For 288601/288628 co-relation queries the response was YES. [2021-12-16 03:06:44,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78997 conditions, 9571 events. 3555/9571 cut-off events. For 288601/288628 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 98759 event pairs, 245 based on Foata normal form. 18/9448 useless extension candidates. Maximal degree in co-relation 78815. Up to 1368 conditions per place. [2021-12-16 03:06:44,818 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 938 selfloop transitions, 1537 changer transitions 5/2534 dead transitions. [2021-12-16 03:06:44,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 2534 transitions, 54482 flow [2021-12-16 03:06:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 03:06:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-16 03:06:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3864 transitions. [2021-12-16 03:06:44,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779189352692075 [2021-12-16 03:06:44,823 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3864 transitions. [2021-12-16 03:06:44,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3864 transitions. [2021-12-16 03:06:44,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:06:44,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3864 transitions. [2021-12-16 03:06:44,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 67.78947368421052) internal successors, (3864), 57 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:44,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:44,851 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 87.0) internal successors, (5046), 58 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:44,852 INFO L186 Difference]: Start difference. First operand has 633 places, 1685 transitions, 31869 flow. Second operand 57 states and 3864 transitions. [2021-12-16 03:06:44,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 2534 transitions, 54482 flow [2021-12-16 03:06:48,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2534 transitions, 54113 flow, removed 121 selfloop flow, removed 9 redundant places. [2021-12-16 03:06:48,787 INFO L242 Difference]: Finished difference. Result has 700 places, 2287 transitions, 49878 flow [2021-12-16 03:06:48,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=31643, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=979, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=49878, PETRI_PLACES=700, PETRI_TRANSITIONS=2287} [2021-12-16 03:06:48,790 INFO L334 CegarLoopForPetriNet]: 77 programPoint places, 623 predicate places. [2021-12-16 03:06:48,790 INFO L470 AbstractCegarLoop]: Abstraction has has 700 places, 2287 transitions, 49878 flow [2021-12-16 03:06:48,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.27777777777777) internal successors, (1175), 18 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:48,791 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:06:48,791 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:06:48,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 03:06:49,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 03:06:49,007 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:06:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:06:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1036784394, now seen corresponding path program 11 times [2021-12-16 03:06:49,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:06:49,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086983907] [2021-12-16 03:06:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:06:49,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:06:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:06:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:49,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:06:49,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086983907] [2021-12-16 03:06:49,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086983907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:06:49,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482233410] [2021-12-16 03:06:49,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:06:49,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:06:49,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:06:49,136 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:06:49,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 03:06:49,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-16 03:06:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:06:49,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 03:06:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:06:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:49,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:06:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:06:49,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482233410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:06:49,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:06:49,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 24 [2021-12-16 03:06:49,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175804576] [2021-12-16 03:06:49,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:06:49,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 03:06:49,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:06:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 03:06:49,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-12-16 03:06:49,815 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2021-12-16 03:06:49,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 2287 transitions, 49878 flow. Second operand has 24 states, 24 states have (on average 65.04166666666667) internal successors, (1561), 24 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:06:49,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:06:49,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2021-12-16 03:06:49,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:04,596 INFO L129 PetriNetUnfolder]: 4789/13481 cut-off events. [2021-12-16 03:07:04,596 INFO L130 PetriNetUnfolder]: For 666151/666180 co-relation queries the response was YES. [2021-12-16 03:07:04,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120287 conditions, 13481 events. 4789/13481 cut-off events. For 666151/666180 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 152153 event pairs, 116 based on Foata normal form. 65/13518 useless extension candidates. Maximal degree in co-relation 120085. Up to 1623 conditions per place. [2021-12-16 03:07:05,072 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 572 selfloop transitions, 3025 changer transitions 5/3656 dead transitions. [2021-12-16 03:07:05,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 3656 transitions, 86451 flow [2021-12-16 03:07:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-16 03:07:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-12-16 03:07:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 9040 transitions. [2021-12-16 03:07:05,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7640297498309668 [2021-12-16 03:07:05,082 INFO L72 ComplementDD]: Start complementDD. Operand 136 states and 9040 transitions. [2021-12-16 03:07:05,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 136 states and 9040 transitions. [2021-12-16 03:07:05,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:05,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 136 states and 9040 transitions. [2021-12-16 03:07:05,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 137 states, 136 states have (on average 66.47058823529412) internal successors, (9040), 136 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:05,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 137 states, 137 states have (on average 87.0) internal successors, (11919), 137 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:05,111 INFO L81 ComplementDD]: Finished complementDD. Result has 137 states, 137 states have (on average 87.0) internal successors, (11919), 137 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:05,111 INFO L186 Difference]: Start difference. First operand has 700 places, 2287 transitions, 49878 flow. Second operand 136 states and 9040 transitions. [2021-12-16 03:07:05,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 3656 transitions, 86451 flow