./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-2.i --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/pthread/triangular-longest-2.i -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 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:05:14,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:05:14,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:05:14,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:05:14,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:05:14,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:05:14,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:05:14,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:05:14,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:05:14,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:05:14,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:05:14,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:05:14,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:05:14,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:05:14,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:05:14,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:05:14,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:05:14,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:05:14,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:05:14,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:05:14,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:05:14,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:05:14,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:05:14,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:05:14,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:05:14,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:05:14,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:05:14,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:05:14,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:05:14,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:05:14,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:05:14,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:05:14,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:05:14,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:05:14,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:05:14,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:05:14,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:05:14,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:05:14,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:05:14,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:05:14,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:05:14,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:05:14,468 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:05:14,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:05:14,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:05:14,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:05:14,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:05:14,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:05:14,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:05:14,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:05:14,471 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:05:14,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:05:14,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:05:14,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:05:14,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:05:14,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:05:14,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:05:14,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:05:14,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:05:14,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:05:14,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:05:14,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:05:14,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:05:14,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:05:14,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:05:14,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:05:14,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:05:14,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:05:14,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:05:14,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:05:14,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:05:14,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:05:14,480 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:05:14,480 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:05:14,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:05:14,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:05:14,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2021-12-17 22:05:14,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:05:14,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:05:14,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:05:14,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:05:14,731 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:05:14,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-2.i [2021-12-17 22:05:14,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff9d20cf/38becd2f8ff448da90483a260fbc520f/FLAGa6ad5a645 [2021-12-17 22:05:15,167 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:05:15,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i [2021-12-17 22:05:15,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff9d20cf/38becd2f8ff448da90483a260fbc520f/FLAGa6ad5a645 [2021-12-17 22:05:15,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dff9d20cf/38becd2f8ff448da90483a260fbc520f [2021-12-17 22:05:15,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:05:15,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:05:15,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:05:15,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:05:15,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:05:15,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1431b4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15, skipping insertion in model container [2021-12-17 22:05:15,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:05:15,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:05:15,508 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/pthread/triangular-longest-2.i[30964,30977] [2021-12-17 22:05:15,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:05:15,514 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:05:15,559 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/pthread/triangular-longest-2.i[30964,30977] [2021-12-17 22:05:15,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:05:15,597 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:05:15,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15 WrapperNode [2021-12-17 22:05:15,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:05:15,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:05:15,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:05:15,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:05:15,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,657 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-12-17 22:05:15,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:05:15,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:05:15,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:05:15,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:05:15,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:05:15,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:05:15,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:05:15,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:05:15,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (1/1) ... [2021-12-17 22:05:15,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:05:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:15,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 22:05:15,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 22:05:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-12-17 22:05:15,769 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-12-17 22:05:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-12-17 22:05:15,770 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-12-17 22:05:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:05:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:05:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:05:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:05:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:05:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:05:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:05:15,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:05:15,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:05:15,772 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:05:15,910 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:05:15,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:05:16,052 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:05:16,066 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:05:16,067 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 22:05:16,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:05:16 BoogieIcfgContainer [2021-12-17 22:05:16,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:05:16,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:05:16,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:05:16,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:05:16,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:05:15" (1/3) ... [2021-12-17 22:05:16,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cafd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:05:16, skipping insertion in model container [2021-12-17 22:05:16,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:05:15" (2/3) ... [2021-12-17 22:05:16,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cafd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:05:16, skipping insertion in model container [2021-12-17 22:05:16,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:05:16" (3/3) ... [2021-12-17 22:05:16,075 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-12-17 22:05:16,079 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:05:16,079 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:05:16,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:05:16,080 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:05:16,107 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,107 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,107 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,107 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,108 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,108 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,108 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,108 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,109 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,110 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,110 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,110 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,110 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,111 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,111 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,112 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,112 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,112 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,113 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,113 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,113 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,113 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,114 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,115 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,115 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,115 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,115 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,115 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,116 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,116 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,116 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,116 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,116 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,116 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,116 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,117 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,117 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,117 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,117 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,117 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,118 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,118 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,118 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,118 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,119 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,119 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,119 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,119 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,119 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,120 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,120 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,123 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,124 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,124 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,124 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,124 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,124 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,129 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,130 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,130 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,130 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:05:16,131 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-17 22:05:16,171 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:05:16,177 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:05:16,177 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 22:05:16,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2021-12-17 22:05:16,225 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-12-17 22:05:16,225 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:05:16,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2021-12-17 22:05:16,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2021-12-17 22:05:16,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2021-12-17 22:05:16,253 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2021-12-17 22:05:16,253 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:05:16,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:16,255 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:16,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2021-12-17 22:05:16,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:16,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493449877] [2021-12-17 22:05:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:16,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:16,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:16,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493449877] [2021-12-17 22:05:16,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493449877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:05:16,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:05:16,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:05:16,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362568886] [2021-12-17 22:05:16,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:05:16,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:05:16,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:05:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:05:16,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:16,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 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) [2021-12-17 22:05:16,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:16,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:16,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:16,708 INFO L129 PetriNetUnfolder]: 50/247 cut-off events. [2021-12-17 22:05:16,708 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 22:05:16,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 247 events. 50/247 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1076 event pairs, 1 based on Foata normal form. 52/277 useless extension candidates. Maximal degree in co-relation 304. Up to 27 conditions per place. [2021-12-17 22:05:16,711 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 14 selfloop transitions, 6 changer transitions 20/85 dead transitions. [2021-12-17 22:05:16,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 240 flow [2021-12-17 22:05:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:05:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:05:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 491 transitions. [2021-12-17 22:05:16,724 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8767857142857143 [2021-12-17 22:05:16,725 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 491 transitions. [2021-12-17 22:05:16,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 491 transitions. [2021-12-17 22:05:16,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:16,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 491 transitions. [2021-12-17 22:05:16,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 61.375) internal successors, (491), 8 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,736 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,737 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 8 states and 491 transitions. [2021-12-17 22:05:16,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 240 flow [2021-12-17 22:05:16,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 22:05:16,741 INFO L242 Difference]: Finished difference. Result has 80 places, 59 transitions, 164 flow [2021-12-17 22:05:16,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2021-12-17 22:05:16,744 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2021-12-17 22:05:16,745 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 164 flow [2021-12-17 22:05:16,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 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) [2021-12-17 22:05:16,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:16,745 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] [2021-12-17 22:05:16,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:05:16,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2021-12-17 22:05:16,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:16,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367646452] [2021-12-17 22:05:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:16,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:16,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367646452] [2021-12-17 22:05:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367646452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:05:16,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:05:16,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:05:16,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213867982] [2021-12-17 22:05:16,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:05:16,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:05:16,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:16,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:05:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:05:16,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:16,821 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:16,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:16,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:16,881 INFO L129 PetriNetUnfolder]: 43/212 cut-off events. [2021-12-17 22:05:16,881 INFO L130 PetriNetUnfolder]: For 212/229 co-relation queries the response was YES. [2021-12-17 22:05:16,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 212 events. 43/212 cut-off events. For 212/229 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 754 event pairs, 0 based on Foata normal form. 3/194 useless extension candidates. Maximal degree in co-relation 414. Up to 40 conditions per place. [2021-12-17 22:05:16,883 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 22 selfloop transitions, 11 changer transitions 8/86 dead transitions. [2021-12-17 22:05:16,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 86 transitions, 414 flow [2021-12-17 22:05:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:05:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:05:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-12-17 22:05:16,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-12-17 22:05:16,885 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-12-17 22:05:16,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-12-17 22:05:16,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:16,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-12-17 22:05:16,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,888 INFO L186 Difference]: Start difference. First operand has 80 places, 59 transitions, 164 flow. Second operand 9 states and 530 transitions. [2021-12-17 22:05:16,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 86 transitions, 414 flow [2021-12-17 22:05:16,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 400 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-17 22:05:16,891 INFO L242 Difference]: Finished difference. Result has 81 places, 69 transitions, 282 flow [2021-12-17 22:05:16,891 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2021-12-17 22:05:16,892 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 11 predicate places. [2021-12-17 22:05:16,892 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 282 flow [2021-12-17 22:05:16,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,892 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:16,893 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] [2021-12-17 22:05:16,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:05:16,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2021-12-17 22:05:16,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:16,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771201966] [2021-12-17 22:05:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:16,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:16,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771201966] [2021-12-17 22:05:16,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771201966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:05:16,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:05:16,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:05:16,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898490605] [2021-12-17 22:05:16,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:05:16,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:05:16,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:16,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:05:16,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:05:16,962 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:16,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:16,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:16,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:16,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:17,050 INFO L129 PetriNetUnfolder]: 37/204 cut-off events. [2021-12-17 22:05:17,051 INFO L130 PetriNetUnfolder]: For 617/659 co-relation queries the response was YES. [2021-12-17 22:05:17,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 204 events. 37/204 cut-off events. For 617/659 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 713 event pairs, 0 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 487. Up to 36 conditions per place. [2021-12-17 22:05:17,052 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2021-12-17 22:05:17,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 552 flow [2021-12-17 22:05:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:05:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:05:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2021-12-17 22:05:17,054 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2021-12-17 22:05:17,054 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2021-12-17 22:05:17,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2021-12-17 22:05:17,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:17,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2021-12-17 22:05:17,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,057 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,057 INFO L186 Difference]: Start difference. First operand has 81 places, 69 transitions, 282 flow. Second operand 9 states and 524 transitions. [2021-12-17 22:05:17,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 552 flow [2021-12-17 22:05:17,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 508 flow, removed 22 selfloop flow, removed 3 redundant places. [2021-12-17 22:05:17,060 INFO L242 Difference]: Finished difference. Result has 88 places, 71 transitions, 331 flow [2021-12-17 22:05:17,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2021-12-17 22:05:17,061 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2021-12-17 22:05:17,061 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 331 flow [2021-12-17 22:05:17,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,062 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:17,062 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] [2021-12-17 22:05:17,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:05:17,062 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash 273435771, now seen corresponding path program 1 times [2021-12-17 22:05:17,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:17,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766567301] [2021-12-17 22:05:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:17,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:17,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:17,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766567301] [2021-12-17 22:05:17,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766567301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:05:17,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:05:17,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:05:17,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472783594] [2021-12-17 22:05:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:05:17,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:05:17,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:05:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:05:17,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:17,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:17,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:17,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:17,208 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2021-12-17 22:05:17,208 INFO L130 PetriNetUnfolder]: For 891/923 co-relation queries the response was YES. [2021-12-17 22:05:17,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 234 events. 43/234 cut-off events. For 891/923 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 838 event pairs, 1 based on Foata normal form. 10/222 useless extension candidates. Maximal degree in co-relation 609. Up to 42 conditions per place. [2021-12-17 22:05:17,210 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 20 changer transitions 8/93 dead transitions. [2021-12-17 22:05:17,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 685 flow [2021-12-17 22:05:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 22:05:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-17 22:05:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2021-12-17 22:05:17,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2021-12-17 22:05:17,212 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2021-12-17 22:05:17,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2021-12-17 22:05:17,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:17,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2021-12-17 22:05:17,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,215 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,215 INFO L186 Difference]: Start difference. First operand has 88 places, 71 transitions, 331 flow. Second operand 11 states and 644 transitions. [2021-12-17 22:05:17,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 685 flow [2021-12-17 22:05:17,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 588 flow, removed 38 selfloop flow, removed 8 redundant places. [2021-12-17 22:05:17,233 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 416 flow [2021-12-17 22:05:17,234 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=416, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-12-17 22:05:17,234 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 24 predicate places. [2021-12-17 22:05:17,234 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 416 flow [2021-12-17 22:05:17,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,235 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:17,235 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:17,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:05:17,235 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1454977483, now seen corresponding path program 2 times [2021-12-17 22:05:17,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:17,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768501732] [2021-12-17 22:05:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:17,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:17,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:17,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768501732] [2021-12-17 22:05:17,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768501732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:05:17,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:05:17,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:05:17,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096151686] [2021-12-17 22:05:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:05:17,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:05:17,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:05:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:05:17,299 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:17,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:17,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:17,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:17,421 INFO L129 PetriNetUnfolder]: 38/219 cut-off events. [2021-12-17 22:05:17,421 INFO L130 PetriNetUnfolder]: For 1007/1063 co-relation queries the response was YES. [2021-12-17 22:05:17,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 219 events. 38/219 cut-off events. For 1007/1063 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 808 event pairs, 1 based on Foata normal form. 20/218 useless extension candidates. Maximal degree in co-relation 600. Up to 41 conditions per place. [2021-12-17 22:05:17,423 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 18 selfloop transitions, 22 changer transitions 11/96 dead transitions. [2021-12-17 22:05:17,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 786 flow [2021-12-17 22:05:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:05:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:05:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-12-17 22:05:17,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-12-17 22:05:17,425 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-12-17 22:05:17,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-12-17 22:05:17,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:17,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-12-17 22:05:17,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 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) [2021-12-17 22:05:17,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,428 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,429 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 416 flow. Second operand 12 states and 696 transitions. [2021-12-17 22:05:17,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 786 flow [2021-12-17 22:05:17,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 712 flow, removed 21 selfloop flow, removed 7 redundant places. [2021-12-17 22:05:17,433 INFO L242 Difference]: Finished difference. Result has 101 places, 79 transitions, 494 flow [2021-12-17 22:05:17,433 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=494, PETRI_PLACES=101, PETRI_TRANSITIONS=79} [2021-12-17 22:05:17,434 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 31 predicate places. [2021-12-17 22:05:17,434 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 79 transitions, 494 flow [2021-12-17 22:05:17,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,434 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:17,434 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-17 22:05:17,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:05:17,435 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:17,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2138322864, now seen corresponding path program 1 times [2021-12-17 22:05:17,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958058857] [2021-12-17 22:05:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:17,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:17,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958058857] [2021-12-17 22:05:17,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958058857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264240961] [2021-12-17 22:05:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:17,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:17,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:17,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:17,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 22:05:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:17,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 22:05:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:17,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264240961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:17,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:17,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-17 22:05:17,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871241974] [2021-12-17 22:05:17,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:17,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 22:05:17,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 22:05:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-17 22:05:17,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:17,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 79 transitions, 494 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:17,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:17,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:17,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:18,059 INFO L129 PetriNetUnfolder]: 50/302 cut-off events. [2021-12-17 22:05:18,060 INFO L130 PetriNetUnfolder]: For 1818/1870 co-relation queries the response was YES. [2021-12-17 22:05:18,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 302 events. 50/302 cut-off events. For 1818/1870 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1054 event pairs, 0 based on Foata normal form. 24/295 useless extension candidates. Maximal degree in co-relation 887. Up to 59 conditions per place. [2021-12-17 22:05:18,062 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 34 selfloop transitions, 17 changer transitions 20/116 dead transitions. [2021-12-17 22:05:18,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 1215 flow [2021-12-17 22:05:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 22:05:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-17 22:05:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1104 transitions. [2021-12-17 22:05:18,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8300751879699249 [2021-12-17 22:05:18,065 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1104 transitions. [2021-12-17 22:05:18,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1104 transitions. [2021-12-17 22:05:18,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:18,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1104 transitions. [2021-12-17 22:05:18,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:18,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:18,069 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:18,069 INFO L186 Difference]: Start difference. First operand has 101 places, 79 transitions, 494 flow. Second operand 19 states and 1104 transitions. [2021-12-17 22:05:18,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 1215 flow [2021-12-17 22:05:18,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 116 transitions, 1089 flow, removed 42 selfloop flow, removed 10 redundant places. [2021-12-17 22:05:18,074 INFO L242 Difference]: Finished difference. Result has 119 places, 85 transitions, 598 flow [2021-12-17 22:05:18,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=598, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2021-12-17 22:05:18,075 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 49 predicate places. [2021-12-17 22:05:18,075 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 598 flow [2021-12-17 22:05:18,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:18,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:18,076 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-17 22:05:18,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 22:05:18,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 22:05:18,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2088183908, now seen corresponding path program 2 times [2021-12-17 22:05:18,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783597077] [2021-12-17 22:05:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:18,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:18,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783597077] [2021-12-17 22:05:18,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783597077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311286180] [2021-12-17 22:05:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:05:18,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:18,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:18,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 22:05:18,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:05:18,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 22:05:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:18,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:18,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311286180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:18,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:18,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-17 22:05:18,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190005223] [2021-12-17 22:05:18,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:18,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 22:05:18,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 22:05:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 22:05:18,673 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:18,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 598 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:18,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:18,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:18,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:18,990 INFO L129 PetriNetUnfolder]: 79/443 cut-off events. [2021-12-17 22:05:18,990 INFO L130 PetriNetUnfolder]: For 7219/7347 co-relation queries the response was YES. [2021-12-17 22:05:18,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 443 events. 79/443 cut-off events. For 7219/7347 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2069 event pairs, 0 based on Foata normal form. 27/427 useless extension candidates. Maximal degree in co-relation 1864. Up to 99 conditions per place. [2021-12-17 22:05:18,996 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 30 selfloop transitions, 48 changer transitions 23/146 dead transitions. [2021-12-17 22:05:18,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 146 transitions, 2267 flow [2021-12-17 22:05:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 22:05:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-17 22:05:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1626 transitions. [2021-12-17 22:05:18,999 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8295918367346938 [2021-12-17 22:05:18,999 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1626 transitions. [2021-12-17 22:05:18,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1626 transitions. [2021-12-17 22:05:19,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:19,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1626 transitions. [2021-12-17 22:05:19,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.07142857142857) internal successors, (1626), 28 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:19,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:19,005 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:19,005 INFO L186 Difference]: Start difference. First operand has 119 places, 85 transitions, 598 flow. Second operand 28 states and 1626 transitions. [2021-12-17 22:05:19,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 146 transitions, 2267 flow [2021-12-17 22:05:19,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 146 transitions, 1797 flow, removed 224 selfloop flow, removed 12 redundant places. [2021-12-17 22:05:19,015 INFO L242 Difference]: Finished difference. Result has 148 places, 105 transitions, 1045 flow [2021-12-17 22:05:19,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1045, PETRI_PLACES=148, PETRI_TRANSITIONS=105} [2021-12-17 22:05:19,016 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 78 predicate places. [2021-12-17 22:05:19,016 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 105 transitions, 1045 flow [2021-12-17 22:05:19,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:19,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:19,016 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-17 22:05:19,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:19,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-17 22:05:19,233 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1879270176, now seen corresponding path program 1 times [2021-12-17 22:05:19,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:19,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258554788] [2021-12-17 22:05:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:19,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:19,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:19,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258554788] [2021-12-17 22:05:19,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258554788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:19,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101576439] [2021-12-17 22:05:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:19,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:19,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:19,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:19,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 22:05:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 22:05:19,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:19,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:19,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101576439] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:19,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:19,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-17 22:05:19,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645425695] [2021-12-17 22:05:19,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:19,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 22:05:19,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 22:05:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-17 22:05:19,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:19,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 105 transitions, 1045 flow. Second operand has 16 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:19,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:19,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:19,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:20,229 INFO L129 PetriNetUnfolder]: 99/546 cut-off events. [2021-12-17 22:05:20,229 INFO L130 PetriNetUnfolder]: For 18427/18707 co-relation queries the response was YES. [2021-12-17 22:05:20,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 546 events. 99/546 cut-off events. For 18427/18707 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3025 event pairs, 2 based on Foata normal form. 31/523 useless extension candidates. Maximal degree in co-relation 3084. Up to 135 conditions per place. [2021-12-17 22:05:20,235 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 32 selfloop transitions, 65 changer transitions 23/165 dead transitions. [2021-12-17 22:05:20,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 3448 flow [2021-12-17 22:05:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 22:05:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-17 22:05:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1679 transitions. [2021-12-17 22:05:20,239 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8270935960591133 [2021-12-17 22:05:20,239 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1679 transitions. [2021-12-17 22:05:20,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1679 transitions. [2021-12-17 22:05:20,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:20,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1679 transitions. [2021-12-17 22:05:20,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.89655172413793) internal successors, (1679), 29 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:20,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:20,245 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:20,245 INFO L186 Difference]: Start difference. First operand has 148 places, 105 transitions, 1045 flow. Second operand 29 states and 1679 transitions. [2021-12-17 22:05:20,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 3448 flow [2021-12-17 22:05:20,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 165 transitions, 2887 flow, removed 274 selfloop flow, removed 10 redundant places. [2021-12-17 22:05:20,264 INFO L242 Difference]: Finished difference. Result has 176 places, 127 transitions, 1611 flow [2021-12-17 22:05:20,264 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1611, PETRI_PLACES=176, PETRI_TRANSITIONS=127} [2021-12-17 22:05:20,265 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 106 predicate places. [2021-12-17 22:05:20,265 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 127 transitions, 1611 flow [2021-12-17 22:05:20,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:20,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:20,266 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-12-17 22:05:20,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:20,482 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 [2021-12-17 22:05:20,482 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:20,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1375112713, now seen corresponding path program 2 times [2021-12-17 22:05:20,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:20,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837228876] [2021-12-17 22:05:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:20,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:20,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837228876] [2021-12-17 22:05:20,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837228876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326846849] [2021-12-17 22:05:20,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:05:20,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:20,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:20,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:20,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 22:05:20,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:05:20,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 22:05:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:20,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:20,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326846849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:20,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:20,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-17 22:05:20,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576123928] [2021-12-17 22:05:20,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:20,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 22:05:20,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 22:05:20,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-17 22:05:20,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:20,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 127 transitions, 1611 flow. Second operand has 17 states, 17 states have (on average 56.529411764705884) internal successors, (961), 17 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:20,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:20,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:20,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:21,517 INFO L129 PetriNetUnfolder]: 134/776 cut-off events. [2021-12-17 22:05:21,517 INFO L130 PetriNetUnfolder]: For 44131/44406 co-relation queries the response was YES. [2021-12-17 22:05:21,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5280 conditions, 776 events. 134/776 cut-off events. For 44131/44406 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4850 event pairs, 0 based on Foata normal form. 49/751 useless extension candidates. Maximal degree in co-relation 5187. Up to 188 conditions per place. [2021-12-17 22:05:21,529 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 44 selfloop transitions, 106 changer transitions 29/224 dead transitions. [2021-12-17 22:05:21,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 224 transitions, 6091 flow [2021-12-17 22:05:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 22:05:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-17 22:05:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2021-12-17 22:05:21,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-12-17 22:05:21,532 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2021-12-17 22:05:21,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2021-12-17 22:05:21,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:21,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2021-12-17 22:05:21,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:21,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:21,538 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:21,538 INFO L186 Difference]: Start difference. First operand has 176 places, 127 transitions, 1611 flow. Second operand 36 states and 2085 transitions. [2021-12-17 22:05:21,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 224 transitions, 6091 flow [2021-12-17 22:05:21,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 224 transitions, 4843 flow, removed 595 selfloop flow, removed 17 redundant places. [2021-12-17 22:05:21,623 INFO L242 Difference]: Finished difference. Result has 208 places, 169 transitions, 2627 flow [2021-12-17 22:05:21,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2627, PETRI_PLACES=208, PETRI_TRANSITIONS=169} [2021-12-17 22:05:21,625 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 138 predicate places. [2021-12-17 22:05:21,625 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 169 transitions, 2627 flow [2021-12-17 22:05:21,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.529411764705884) internal successors, (961), 17 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:21,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:21,626 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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] [2021-12-17 22:05:21,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:21,843 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 [2021-12-17 22:05:21,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1020208377, now seen corresponding path program 3 times [2021-12-17 22:05:21,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:21,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457540078] [2021-12-17 22:05:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:21,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:21,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457540078] [2021-12-17 22:05:21,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457540078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:21,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99628818] [2021-12-17 22:05:21,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:05:21,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:21,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:21,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:21,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 22:05:22,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 22:05:22,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:22,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 22:05:22,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:22,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99628818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:22,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:22,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-12-17 22:05:22,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703041353] [2021-12-17 22:05:22,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:22,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 22:05:22,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 22:05:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-12-17 22:05:22,391 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:22,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 169 transitions, 2627 flow. Second operand has 22 states, 22 states have (on average 56.45454545454545) internal successors, (1242), 22 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) [2021-12-17 22:05:22,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:22,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:22,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:23,189 INFO L129 PetriNetUnfolder]: 216/1345 cut-off events. [2021-12-17 22:05:23,190 INFO L130 PetriNetUnfolder]: For 99011/99308 co-relation queries the response was YES. [2021-12-17 22:05:23,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9841 conditions, 1345 events. 216/1345 cut-off events. For 99011/99308 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 9433 event pairs, 0 based on Foata normal form. 54/1263 useless extension candidates. Maximal degree in co-relation 9734. Up to 298 conditions per place. [2021-12-17 22:05:23,212 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 180 changer transitions 26/309 dead transitions. [2021-12-17 22:05:23,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 309 transitions, 9989 flow [2021-12-17 22:05:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 22:05:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-17 22:05:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2431 transitions. [2021-12-17 22:05:23,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8268707482993197 [2021-12-17 22:05:23,216 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2431 transitions. [2021-12-17 22:05:23,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2431 transitions. [2021-12-17 22:05:23,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:23,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2431 transitions. [2021-12-17 22:05:23,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.88095238095238) internal successors, (2431), 42 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:23,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 70.0) internal successors, (3010), 43 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:23,224 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 70.0) internal successors, (3010), 43 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:23,225 INFO L186 Difference]: Start difference. First operand has 208 places, 169 transitions, 2627 flow. Second operand 42 states and 2431 transitions. [2021-12-17 22:05:23,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 309 transitions, 9989 flow [2021-12-17 22:05:23,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 309 transitions, 7654 flow, removed 1134 selfloop flow, removed 24 redundant places. [2021-12-17 22:05:23,332 INFO L242 Difference]: Finished difference. Result has 241 places, 251 transitions, 4668 flow [2021-12-17 22:05:23,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4668, PETRI_PLACES=241, PETRI_TRANSITIONS=251} [2021-12-17 22:05:23,333 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 171 predicate places. [2021-12-17 22:05:23,334 INFO L470 AbstractCegarLoop]: Abstraction has has 241 places, 251 transitions, 4668 flow [2021-12-17 22:05:23,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.45454545454545) internal successors, (1242), 22 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) [2021-12-17 22:05:23,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:23,334 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:23,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 22:05:23,548 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 [2021-12-17 22:05:23,548 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1794679756, now seen corresponding path program 4 times [2021-12-17 22:05:23,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:23,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688219635] [2021-12-17 22:05:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:23,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:23,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:23,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688219635] [2021-12-17 22:05:23,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688219635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:23,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366881641] [2021-12-17 22:05:23,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:05:23,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:23,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:23,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:23,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 22:05:23,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:05:23,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 22:05:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:24,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:24,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366881641] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:24,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:24,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-12-17 22:05:24,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639502033] [2021-12-17 22:05:24,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:24,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 22:05:24,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 22:05:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 22:05:24,795 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:24,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 251 transitions, 4668 flow. Second operand has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:24,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:24,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:24,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:25,883 INFO L129 PetriNetUnfolder]: 258/1681 cut-off events. [2021-12-17 22:05:25,883 INFO L130 PetriNetUnfolder]: For 168548/168814 co-relation queries the response was YES. [2021-12-17 22:05:25,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13361 conditions, 1681 events. 258/1681 cut-off events. For 168548/168814 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10930 event pairs, 0 based on Foata normal form. 37/1536 useless extension candidates. Maximal degree in co-relation 13241. Up to 366 conditions per place. [2021-12-17 22:05:25,931 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 218 selfloop transitions, 45 changer transitions 50/358 dead transitions. [2021-12-17 22:05:25,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 358 transitions, 13268 flow [2021-12-17 22:05:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 22:05:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-12-17 22:05:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2834 transitions. [2021-12-17 22:05:25,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8262390670553936 [2021-12-17 22:05:25,939 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2834 transitions. [2021-12-17 22:05:25,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2834 transitions. [2021-12-17 22:05:25,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:25,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2834 transitions. [2021-12-17 22:05:25,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.83673469387755) internal successors, (2834), 49 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:25,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 70.0) internal successors, (3500), 50 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:25,949 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 70.0) internal successors, (3500), 50 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:25,950 INFO L186 Difference]: Start difference. First operand has 241 places, 251 transitions, 4668 flow. Second operand 49 states and 2834 transitions. [2021-12-17 22:05:25,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 358 transitions, 13268 flow [2021-12-17 22:05:26,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 358 transitions, 10792 flow, removed 1188 selfloop flow, removed 22 redundant places. [2021-12-17 22:05:26,108 INFO L242 Difference]: Finished difference. Result has 295 places, 277 transitions, 5175 flow [2021-12-17 22:05:26,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5175, PETRI_PLACES=295, PETRI_TRANSITIONS=277} [2021-12-17 22:05:26,109 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 225 predicate places. [2021-12-17 22:05:26,109 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 277 transitions, 5175 flow [2021-12-17 22:05:26,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:26,110 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:26,110 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:26,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:26,324 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 [2021-12-17 22:05:26,324 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2035951210, now seen corresponding path program 5 times [2021-12-17 22:05:26,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:26,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884830714] [2021-12-17 22:05:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:26,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:26,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:26,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884830714] [2021-12-17 22:05:26,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884830714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:26,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024061353] [2021-12-17 22:05:26,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:05:26,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:26,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:26,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:26,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 22:05:26,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 22:05:26,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 22:05:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:26,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:27,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024061353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:27,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:27,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2021-12-17 22:05:27,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433761674] [2021-12-17 22:05:27,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:27,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 22:05:27,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:27,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 22:05:27,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 22:05:27,370 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:27,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 277 transitions, 5175 flow. Second operand has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:27,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:27,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:27,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:28,776 INFO L129 PetriNetUnfolder]: 317/2170 cut-off events. [2021-12-17 22:05:28,776 INFO L130 PetriNetUnfolder]: For 316039/316474 co-relation queries the response was YES. [2021-12-17 22:05:28,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18998 conditions, 2170 events. 317/2170 cut-off events. For 316039/316474 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 15659 event pairs, 0 based on Foata normal form. 44/1976 useless extension candidates. Maximal degree in co-relation 18853. Up to 483 conditions per place. [2021-12-17 22:05:28,816 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 188 selfloop transitions, 142 changer transitions 50/425 dead transitions. [2021-12-17 22:05:28,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 425 transitions, 16656 flow [2021-12-17 22:05:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 22:05:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-12-17 22:05:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3235 transitions. [2021-12-17 22:05:28,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8252551020408163 [2021-12-17 22:05:28,821 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3235 transitions. [2021-12-17 22:05:28,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3235 transitions. [2021-12-17 22:05:28,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:28,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3235 transitions. [2021-12-17 22:05:28,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 57.767857142857146) internal successors, (3235), 56 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:28,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 70.0) internal successors, (3990), 57 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:28,829 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 70.0) internal successors, (3990), 57 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:28,829 INFO L186 Difference]: Start difference. First operand has 295 places, 277 transitions, 5175 flow. Second operand 56 states and 3235 transitions. [2021-12-17 22:05:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 425 transitions, 16656 flow [2021-12-17 22:05:29,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 425 transitions, 14373 flow, removed 1123 selfloop flow, removed 28 redundant places. [2021-12-17 22:05:29,295 INFO L242 Difference]: Finished difference. Result has 340 places, 339 transitions, 7175 flow [2021-12-17 22:05:29,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=7175, PETRI_PLACES=340, PETRI_TRANSITIONS=339} [2021-12-17 22:05:29,296 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 270 predicate places. [2021-12-17 22:05:29,296 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 339 transitions, 7175 flow [2021-12-17 22:05:29,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:29,297 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:29,297 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:29,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:29,511 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 [2021-12-17 22:05:29,512 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash -620052250, now seen corresponding path program 6 times [2021-12-17 22:05:29,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608080317] [2021-12-17 22:05:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:29,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:05:29,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:29,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608080317] [2021-12-17 22:05:29,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608080317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:29,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568252941] [2021-12-17 22:05:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 22:05:29,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:29,704 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:05:29,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 22:05:29,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 22:05:29,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 22:05:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:05:30,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:05:30,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568252941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:30,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:30,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2021-12-17 22:05:30,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037521025] [2021-12-17 22:05:30,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:30,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 22:05:30,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:30,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 22:05:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 22:05:30,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:30,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 339 transitions, 7175 flow. Second operand has 34 states, 34 states have (on average 56.3235294117647) internal successors, (1915), 34 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:30,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:30,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:30,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:32,460 INFO L129 PetriNetUnfolder]: 431/2973 cut-off events. [2021-12-17 22:05:32,460 INFO L130 PetriNetUnfolder]: For 600009/601296 co-relation queries the response was YES. [2021-12-17 22:05:32,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29613 conditions, 2973 events. 431/2973 cut-off events. For 600009/601296 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 24717 event pairs, 0 based on Foata normal form. 76/2736 useless extension candidates. Maximal degree in co-relation 29449. Up to 685 conditions per place. [2021-12-17 22:05:32,524 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 82 selfloop transitions, 378 changer transitions 50/555 dead transitions. [2021-12-17 22:05:32,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 555 transitions, 23501 flow [2021-12-17 22:05:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-17 22:05:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-17 22:05:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3699 transitions. [2021-12-17 22:05:32,529 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256696428571428 [2021-12-17 22:05:32,529 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3699 transitions. [2021-12-17 22:05:32,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3699 transitions. [2021-12-17 22:05:32,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:32,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3699 transitions. [2021-12-17 22:05:32,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.796875) internal successors, (3699), 64 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:32,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:32,539 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:32,539 INFO L186 Difference]: Start difference. First operand has 340 places, 339 transitions, 7175 flow. Second operand 64 states and 3699 transitions. [2021-12-17 22:05:32,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 555 transitions, 23501 flow [2021-12-17 22:05:33,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 555 transitions, 20484 flow, removed 1491 selfloop flow, removed 26 redundant places. [2021-12-17 22:05:33,740 INFO L242 Difference]: Finished difference. Result has 398 places, 460 transitions, 11271 flow [2021-12-17 22:05:33,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=11271, PETRI_PLACES=398, PETRI_TRANSITIONS=460} [2021-12-17 22:05:33,741 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 328 predicate places. [2021-12-17 22:05:33,741 INFO L470 AbstractCegarLoop]: Abstraction has has 398 places, 460 transitions, 11271 flow [2021-12-17 22:05:33,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.3235294117647) internal successors, (1915), 34 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:33,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:33,755 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:33,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:33,971 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 [2021-12-17 22:05:33,971 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1824928014, now seen corresponding path program 7 times [2021-12-17 22:05:33,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:33,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591643391] [2021-12-17 22:05:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:33,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:34,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591643391] [2021-12-17 22:05:34,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591643391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118490860] [2021-12-17 22:05:34,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 22:05:34,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:34,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:34,175 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) [2021-12-17 22:05:34,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 22:05:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 22:05:34,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:34,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:34,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118490860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:34,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:34,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-12-17 22:05:34,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950393515] [2021-12-17 22:05:34,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:34,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 22:05:34,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:34,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 22:05:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=814, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 22:05:34,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:34,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 460 transitions, 11271 flow. Second operand has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:34,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:34,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:34,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:37,165 INFO L129 PetriNetUnfolder]: 519/3641 cut-off events. [2021-12-17 22:05:37,165 INFO L130 PetriNetUnfolder]: For 992943/993640 co-relation queries the response was YES. [2021-12-17 22:05:37,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40555 conditions, 3641 events. 519/3641 cut-off events. For 992943/993640 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 31129 event pairs, 0 based on Foata normal form. 85/3343 useless extension candidates. Maximal degree in co-relation 40369. Up to 809 conditions per place. [2021-12-17 22:05:37,313 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 87 selfloop transitions, 474 changer transitions 50/656 dead transitions. [2021-12-17 22:05:37,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 656 transitions, 32679 flow [2021-12-17 22:05:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 22:05:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-17 22:05:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4397 transitions. [2021-12-17 22:05:37,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8265037593984963 [2021-12-17 22:05:37,322 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4397 transitions. [2021-12-17 22:05:37,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4397 transitions. [2021-12-17 22:05:37,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:37,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4397 transitions. [2021-12-17 22:05:37,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 57.85526315789474) internal successors, (4397), 76 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:37,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 70.0) internal successors, (5390), 77 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:37,335 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 70.0) internal successors, (5390), 77 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:37,335 INFO L186 Difference]: Start difference. First operand has 398 places, 460 transitions, 11271 flow. Second operand 76 states and 4397 transitions. [2021-12-17 22:05:37,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 656 transitions, 32679 flow [2021-12-17 22:05:39,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 656 transitions, 25757 flow, removed 3422 selfloop flow, removed 32 redundant places. [2021-12-17 22:05:39,290 INFO L242 Difference]: Finished difference. Result has 471 places, 549 transitions, 14696 flow [2021-12-17 22:05:39,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9079, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=14696, PETRI_PLACES=471, PETRI_TRANSITIONS=549} [2021-12-17 22:05:39,291 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 401 predicate places. [2021-12-17 22:05:39,292 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 549 transitions, 14696 flow [2021-12-17 22:05:39,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:39,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:39,292 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 12, 12, 12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:39,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:39,507 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 [2021-12-17 22:05:39,507 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1441585909, now seen corresponding path program 8 times [2021-12-17 22:05:39,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:39,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076319023] [2021-12-17 22:05:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:39,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:39,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:39,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076319023] [2021-12-17 22:05:39,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076319023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:39,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931693020] [2021-12-17 22:05:39,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:05:39,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:39,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:39,780 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) [2021-12-17 22:05:39,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 22:05:39,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:05:39,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 22:05:39,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:40,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 22:05:40,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931693020] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:40,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:40,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2021-12-17 22:05:40,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124557426] [2021-12-17 22:05:40,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:40,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 22:05:40,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 22:05:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 22:05:40,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:40,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 549 transitions, 14696 flow. Second operand has 46 states, 46 states have (on average 56.23913043478261) internal successors, (2587), 46 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:40,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:40,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:40,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:44,259 INFO L129 PetriNetUnfolder]: 702/4737 cut-off events. [2021-12-17 22:05:44,267 INFO L130 PetriNetUnfolder]: For 1651998/1653507 co-relation queries the response was YES. [2021-12-17 22:05:44,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60101 conditions, 4737 events. 702/4737 cut-off events. For 1651998/1653507 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 40107 event pairs, 0 based on Foata normal form. 96/4337 useless extension candidates. Maximal degree in co-relation 59887. Up to 1053 conditions per place. [2021-12-17 22:05:44,422 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 109 selfloop transitions, 661 changer transitions 53/868 dead transitions. [2021-12-17 22:05:44,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 868 transitions, 50567 flow [2021-12-17 22:05:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-17 22:05:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-12-17 22:05:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5837 transitions. [2021-12-17 22:05:44,428 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256011315417257 [2021-12-17 22:05:44,429 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5837 transitions. [2021-12-17 22:05:44,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5837 transitions. [2021-12-17 22:05:44,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:44,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5837 transitions. [2021-12-17 22:05:44,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 57.79207920792079) internal successors, (5837), 101 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:44,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 70.0) internal successors, (7140), 102 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:44,445 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 70.0) internal successors, (7140), 102 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:44,446 INFO L186 Difference]: Start difference. First operand has 471 places, 549 transitions, 14696 flow. Second operand 101 states and 5837 transitions. [2021-12-17 22:05:44,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 868 transitions, 50567 flow [2021-12-17 22:05:46,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 868 transitions, 38044 flow, removed 6137 selfloop flow, removed 39 redundant places. [2021-12-17 22:05:46,750 INFO L242 Difference]: Finished difference. Result has 571 places, 732 transitions, 20403 flow [2021-12-17 22:05:46,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=11399, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=20403, PETRI_PLACES=571, PETRI_TRANSITIONS=732} [2021-12-17 22:05:46,751 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 501 predicate places. [2021-12-17 22:05:46,751 INFO L470 AbstractCegarLoop]: Abstraction has has 571 places, 732 transitions, 20403 flow [2021-12-17 22:05:46,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 56.23913043478261) internal successors, (2587), 46 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:46,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:46,752 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:46,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 22:05:46,963 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 [2021-12-17 22:05:46,964 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1356186340, now seen corresponding path program 9 times [2021-12-17 22:05:46,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:46,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409417910] [2021-12-17 22:05:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:46,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:47,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409417910] [2021-12-17 22:05:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409417910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209215580] [2021-12-17 22:05:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:05:47,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:47,660 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) [2021-12-17 22:05:47,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 22:05:47,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 22:05:47,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:05:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:05:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:48,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:05:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209215580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:05:50,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:05:50,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 85 [2021-12-17 22:05:50,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87175518] [2021-12-17 22:05:50,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:05:50,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 22:05:50,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:05:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 22:05:50,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1732, Invalid=5408, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 22:05:50,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:05:50,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 732 transitions, 20403 flow. Second operand has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:50,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:05:50,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:05:50,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:05:52,908 INFO L129 PetriNetUnfolder]: 690/4858 cut-off events. [2021-12-17 22:05:52,908 INFO L130 PetriNetUnfolder]: For 2276585/2277105 co-relation queries the response was YES. [2021-12-17 22:05:53,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63785 conditions, 4858 events. 690/4858 cut-off events. For 2276585/2277105 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 40908 event pairs, 0 based on Foata normal form. 31/4364 useless extension candidates. Maximal degree in co-relation 63531. Up to 1119 conditions per place. [2021-12-17 22:05:53,084 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 687 selfloop transitions, 59 changer transitions 14/805 dead transitions. [2021-12-17 22:05:53,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 805 transitions, 34608 flow [2021-12-17 22:05:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 22:05:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-17 22:05:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2924 transitions. [2021-12-17 22:05:53,088 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.819047619047619 [2021-12-17 22:05:53,088 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2924 transitions. [2021-12-17 22:05:53,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2924 transitions. [2021-12-17 22:05:53,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:05:53,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2924 transitions. [2021-12-17 22:05:53,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.333333333333336) internal successors, (2924), 51 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:53,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:53,094 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:53,095 INFO L186 Difference]: Start difference. First operand has 571 places, 732 transitions, 20403 flow. Second operand 51 states and 2924 transitions. [2021-12-17 22:05:53,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 805 transitions, 34608 flow [2021-12-17 22:05:58,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 805 transitions, 27355 flow, removed 3543 selfloop flow, removed 33 redundant places. [2021-12-17 22:05:58,456 INFO L242 Difference]: Finished difference. Result has 589 places, 746 transitions, 16519 flow [2021-12-17 22:05:58,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=15504, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=16519, PETRI_PLACES=589, PETRI_TRANSITIONS=746} [2021-12-17 22:05:58,458 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 519 predicate places. [2021-12-17 22:05:58,458 INFO L470 AbstractCegarLoop]: Abstraction has has 589 places, 746 transitions, 16519 flow [2021-12-17 22:05:58,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:05:58,459 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:05:58,460 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:05:58,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-17 22:05:58,677 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 [2021-12-17 22:05:58,677 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:05:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:05:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1190348046, now seen corresponding path program 10 times [2021-12-17 22:05:58,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:05:58,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215671250] [2021-12-17 22:05:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:05:58,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:05:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:05:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:05:59,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:05:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215671250] [2021-12-17 22:05:59,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215671250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:05:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114643361] [2021-12-17 22:05:59,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:05:59,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:05:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:05:59,567 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) [2021-12-17 22:05:59,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 22:05:59,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:05:59,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:05:59,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:05:59,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:06:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:00,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:06:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:01,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114643361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:06:01,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:06:01,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-17 22:06:01,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631030938] [2021-12-17 22:06:01,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:06:01,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 22:06:01,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:06:01,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 22:06:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1659, Invalid=5651, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 22:06:01,951 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:06:01,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 746 transitions, 16519 flow. Second operand has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:01,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:06:01,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:06:01,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:06:06,014 INFO L129 PetriNetUnfolder]: 760/5451 cut-off events. [2021-12-17 22:06:06,014 INFO L130 PetriNetUnfolder]: For 2192919/2193627 co-relation queries the response was YES. [2021-12-17 22:06:06,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65730 conditions, 5451 events. 760/5451 cut-off events. For 2192919/2193627 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 46431 event pairs, 0 based on Foata normal form. 44/4905 useless extension candidates. Maximal degree in co-relation 65475. Up to 1191 conditions per place. [2021-12-17 22:06:06,163 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 629 selfloop transitions, 226 changer transitions 20/920 dead transitions. [2021-12-17 22:06:06,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 920 transitions, 38740 flow [2021-12-17 22:06:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:06:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:06:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5609 transitions. [2021-12-17 22:06:06,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8176384839650146 [2021-12-17 22:06:06,168 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5609 transitions. [2021-12-17 22:06:06,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5609 transitions. [2021-12-17 22:06:06,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:06:06,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5609 transitions. [2021-12-17 22:06:06,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.234693877551024) internal successors, (5609), 98 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:06,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:06,180 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:06,180 INFO L186 Difference]: Start difference. First operand has 589 places, 746 transitions, 16519 flow. Second operand 98 states and 5609 transitions. [2021-12-17 22:06:06,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 920 transitions, 38740 flow [2021-12-17 22:06:10,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 920 transitions, 37608 flow, removed 521 selfloop flow, removed 36 redundant places. [2021-12-17 22:06:10,560 INFO L242 Difference]: Finished difference. Result has 674 places, 812 transitions, 18756 flow [2021-12-17 22:06:10,561 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=15803, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=18756, PETRI_PLACES=674, PETRI_TRANSITIONS=812} [2021-12-17 22:06:10,561 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 604 predicate places. [2021-12-17 22:06:10,561 INFO L470 AbstractCegarLoop]: Abstraction has has 674 places, 812 transitions, 18756 flow [2021-12-17 22:06:10,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:10,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:06:10,562 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:06:10,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 22:06:10,777 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 [2021-12-17 22:06:10,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:06:10,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:06:10,778 INFO L85 PathProgramCache]: Analyzing trace with hash 422781118, now seen corresponding path program 11 times [2021-12-17 22:06:10,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:06:10,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880171244] [2021-12-17 22:06:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:06:10,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:06:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:06:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:11,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:06:11,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880171244] [2021-12-17 22:06:11,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880171244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:06:11,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633877752] [2021-12-17 22:06:11,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:06:11,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:06:11,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:06:11,468 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) [2021-12-17 22:06:11,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 22:06:11,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-17 22:06:11,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:06:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:06:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:06:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:12,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:06:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:13,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633877752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:06:13,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:06:13,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-17 22:06:13,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952489785] [2021-12-17 22:06:13,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:06:13,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 22:06:13,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:06:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 22:06:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=6031, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 22:06:13,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:06:13,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 812 transitions, 18756 flow. Second operand has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:13,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:06:13,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:06:13,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:06:19,090 INFO L129 PetriNetUnfolder]: 942/7041 cut-off events. [2021-12-17 22:06:19,091 INFO L130 PetriNetUnfolder]: For 3131298/3131864 co-relation queries the response was YES. [2021-12-17 22:06:19,189 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88403 conditions, 7041 events. 942/7041 cut-off events. For 3131298/3131864 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 64267 event pairs, 0 based on Foata normal form. 70/6351 useless extension candidates. Maximal degree in co-relation 88123. Up to 1555 conditions per place. [2021-12-17 22:06:19,254 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 445 selfloop transitions, 595 changer transitions 20/1105 dead transitions. [2021-12-17 22:06:19,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 1105 transitions, 45669 flow [2021-12-17 22:06:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:06:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:06:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5615 transitions. [2021-12-17 22:06:19,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8185131195335277 [2021-12-17 22:06:19,258 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5615 transitions. [2021-12-17 22:06:19,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5615 transitions. [2021-12-17 22:06:19,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:06:19,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5615 transitions. [2021-12-17 22:06:19,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.295918367346935) internal successors, (5615), 98 states have internal predecessors, (5615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:19,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:19,293 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:19,293 INFO L186 Difference]: Start difference. First operand has 674 places, 812 transitions, 18756 flow. Second operand 98 states and 5615 transitions. [2021-12-17 22:06:19,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 1105 transitions, 45669 flow [2021-12-17 22:06:26,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 1105 transitions, 43598 flow, removed 887 selfloop flow, removed 45 redundant places. [2021-12-17 22:06:26,752 INFO L242 Difference]: Finished difference. Result has 734 places, 996 transitions, 24480 flow [2021-12-17 22:06:26,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=17397, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=24480, PETRI_PLACES=734, PETRI_TRANSITIONS=996} [2021-12-17 22:06:26,753 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 664 predicate places. [2021-12-17 22:06:26,753 INFO L470 AbstractCegarLoop]: Abstraction has has 734 places, 996 transitions, 24480 flow [2021-12-17 22:06:26,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:26,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:06:26,754 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:06:26,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-17 22:06:26,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 22:06:26,955 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:06:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:06:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash 825869244, now seen corresponding path program 12 times [2021-12-17 22:06:26,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:06:26,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138073435] [2021-12-17 22:06:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:06:26,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:06:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:06:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:27,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:06:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138073435] [2021-12-17 22:06:27,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138073435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:06:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103325700] [2021-12-17 22:06:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 22:06:27,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:06:27,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:06:27,579 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:06:27,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 22:06:27,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-17 22:06:27,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:06:27,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:06:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:06:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:28,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:06:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:29,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103325700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:06:29,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:06:29,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 85 [2021-12-17 22:06:29,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672197516] [2021-12-17 22:06:29,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:06:29,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 22:06:29,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:06:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 22:06:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=5986, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 22:06:29,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:06:29,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 996 transitions, 24480 flow. Second operand has 85 states, 85 states have (on average 56.10588235294118) internal successors, (4769), 85 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:29,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:06:29,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:06:29,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:06:36,039 INFO L129 PetriNetUnfolder]: 1090/8289 cut-off events. [2021-12-17 22:06:36,040 INFO L130 PetriNetUnfolder]: For 4073387/4074056 co-relation queries the response was YES. [2021-12-17 22:06:36,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108769 conditions, 8289 events. 1090/8289 cut-off events. For 4073387/4074056 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 79046 event pairs, 0 based on Foata normal form. 107/7502 useless extension candidates. Maximal degree in co-relation 108480. Up to 1851 conditions per place. [2021-12-17 22:06:36,322 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 366 selfloop transitions, 823 changer transitions 20/1254 dead transitions. [2021-12-17 22:06:36,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 824 places, 1254 transitions, 51779 flow [2021-12-17 22:06:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:06:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:06:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5618 transitions. [2021-12-17 22:06:36,346 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8189504373177843 [2021-12-17 22:06:36,346 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5618 transitions. [2021-12-17 22:06:36,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5618 transitions. [2021-12-17 22:06:36,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:06:36,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5618 transitions. [2021-12-17 22:06:36,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.326530612244895) internal successors, (5618), 98 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:36,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:36,357 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:36,357 INFO L186 Difference]: Start difference. First operand has 734 places, 996 transitions, 24480 flow. Second operand 98 states and 5618 transitions. [2021-12-17 22:06:36,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 824 places, 1254 transitions, 51779 flow [2021-12-17 22:06:49,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 1254 transitions, 48454 flow, removed 1470 selfloop flow, removed 28 redundant places. [2021-12-17 22:06:49,180 INFO L242 Difference]: Finished difference. Result has 818 places, 1147 transitions, 29210 flow [2021-12-17 22:06:49,181 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=22391, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=702, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=29210, PETRI_PLACES=818, PETRI_TRANSITIONS=1147} [2021-12-17 22:06:49,182 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 748 predicate places. [2021-12-17 22:06:49,182 INFO L470 AbstractCegarLoop]: Abstraction has has 818 places, 1147 transitions, 29210 flow [2021-12-17 22:06:49,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 56.10588235294118) internal successors, (4769), 85 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:49,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:06:49,183 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:06:49,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 22:06:49,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:06:49,399 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:06:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:06:49,399 INFO L85 PathProgramCache]: Analyzing trace with hash -420093952, now seen corresponding path program 13 times [2021-12-17 22:06:49,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:06:49,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84626165] [2021-12-17 22:06:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:06:49,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:06:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:06:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:50,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:06:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84626165] [2021-12-17 22:06:50,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84626165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:06:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874663618] [2021-12-17 22:06:50,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 22:06:50,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:06:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:06:50,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:06:50,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 22:06:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:06:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:06:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:06:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:50,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:06:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:06:51,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874663618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:06:51,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:06:51,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-17 22:06:51,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586982182] [2021-12-17 22:06:51,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:06:51,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 22:06:51,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:06:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 22:06:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=6271, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 22:06:51,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:06:51,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 1147 transitions, 29210 flow. Second operand has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:51,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:06:51,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:06:51,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:06:58,511 INFO L129 PetriNetUnfolder]: 1268/9757 cut-off events. [2021-12-17 22:06:58,512 INFO L130 PetriNetUnfolder]: For 5055147/5055902 co-relation queries the response was YES. [2021-12-17 22:06:58,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130787 conditions, 9757 events. 1268/9757 cut-off events. For 5055147/5055902 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 97205 event pairs, 0 based on Foata normal form. 145/8841 useless extension candidates. Maximal degree in co-relation 130482. Up to 2187 conditions per place. [2021-12-17 22:06:58,757 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 304 selfloop transitions, 1065 changer transitions 20/1434 dead transitions. [2021-12-17 22:06:58,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 1434 transitions, 57722 flow [2021-12-17 22:06:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:06:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:06:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5621 transitions. [2021-12-17 22:06:58,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8193877551020409 [2021-12-17 22:06:58,762 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5621 transitions. [2021-12-17 22:06:58,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5621 transitions. [2021-12-17 22:06:58,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:06:58,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5621 transitions. [2021-12-17 22:06:58,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.357142857142854) internal successors, (5621), 98 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:58,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:58,791 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:06:58,791 INFO L186 Difference]: Start difference. First operand has 818 places, 1147 transitions, 29210 flow. Second operand 98 states and 5621 transitions. [2021-12-17 22:06:58,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 1434 transitions, 57722 flow [2021-12-17 22:07:17,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 1434 transitions, 53511 flow, removed 1713 selfloop flow, removed 38 redundant places. [2021-12-17 22:07:17,978 INFO L242 Difference]: Finished difference. Result has 885 places, 1327 transitions, 34165 flow [2021-12-17 22:07:17,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=26507, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=949, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=34165, PETRI_PLACES=885, PETRI_TRANSITIONS=1327} [2021-12-17 22:07:17,980 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 815 predicate places. [2021-12-17 22:07:17,980 INFO L470 AbstractCegarLoop]: Abstraction has has 885 places, 1327 transitions, 34165 flow [2021-12-17 22:07:17,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:07:17,981 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:07:17,981 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:07:18,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-17 22:07:18,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:07:18,196 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:07:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:07:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1092826086, now seen corresponding path program 14 times [2021-12-17 22:07:18,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:07:18,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523111635] [2021-12-17 22:07:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:07:18,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:07:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:07:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:07:18,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:07:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523111635] [2021-12-17 22:07:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523111635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:07:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032525540] [2021-12-17 22:07:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:07:18,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:07:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:07:18,698 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:07:18,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 22:07:18,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:07:18,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:07:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:07:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:07:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:07:19,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:07:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:07:20,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032525540] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:07:20,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:07:20,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-17 22:07:20,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585654378] [2021-12-17 22:07:20,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:07:20,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 22:07:20,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:07:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 22:07:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=6351, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 22:07:20,824 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:07:20,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 885 places, 1327 transitions, 34165 flow. Second operand has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:07:20,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:07:20,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:07:20,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:07:29,543 INFO L129 PetriNetUnfolder]: 1402/10886 cut-off events. [2021-12-17 22:07:29,543 INFO L130 PetriNetUnfolder]: For 5769857/5770864 co-relation queries the response was YES. [2021-12-17 22:07:29,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147088 conditions, 10886 events. 1402/10886 cut-off events. For 5769857/5770864 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 110789 event pairs, 0 based on Foata normal form. 177/9886 useless extension candidates. Maximal degree in co-relation 146775. Up to 2431 conditions per place. [2021-12-17 22:07:30,033 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 247 selfloop transitions, 1258 changer transitions 20/1570 dead transitions. [2021-12-17 22:07:30,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 975 places, 1570 transitions, 62204 flow [2021-12-17 22:07:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:07:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:07:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5625 transitions. [2021-12-17 22:07:30,040 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8199708454810496 [2021-12-17 22:07:30,040 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5625 transitions. [2021-12-17 22:07:30,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5625 transitions. [2021-12-17 22:07:30,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:07:30,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5625 transitions. [2021-12-17 22:07:30,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.39795918367347) internal successors, (5625), 98 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:07:30,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:07:30,096 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:07:30,097 INFO L186 Difference]: Start difference. First operand has 885 places, 1327 transitions, 34165 flow. Second operand 98 states and 5625 transitions. [2021-12-17 22:07:30,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 975 places, 1570 transitions, 62204 flow [2021-12-17 22:08:13,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 1570 transitions, 57793 flow, removed 1788 selfloop flow, removed 37 redundant places. [2021-12-17 22:08:13,837 INFO L242 Difference]: Finished difference. Result has 953 places, 1463 transitions, 38342 flow [2021-12-17 22:08:13,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=31290, PETRI_DIFFERENCE_MINUEND_PLACES=841, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=38342, PETRI_PLACES=953, PETRI_TRANSITIONS=1463} [2021-12-17 22:08:13,838 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 883 predicate places. [2021-12-17 22:08:13,838 INFO L470 AbstractCegarLoop]: Abstraction has has 953 places, 1463 transitions, 38342 flow [2021-12-17 22:08:13,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:08:13,839 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:08:13,839 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:08:13,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 22:08:14,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:08:14,055 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:08:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:08:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash 138021162, now seen corresponding path program 15 times [2021-12-17 22:08:14,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:08:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621000227] [2021-12-17 22:08:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:08:14,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:08:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:08:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:08:14,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:08:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621000227] [2021-12-17 22:08:14,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621000227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:08:14,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978508250] [2021-12-17 22:08:14,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:08:14,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:08:14,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:08:14,703 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:08:14,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 22:08:14,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-17 22:08:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:08:14,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 22:08:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:08:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:08:15,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:08:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:08:16,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978508250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:08:16,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:08:16,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-17 22:08:16,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797035670] [2021-12-17 22:08:16,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:08:16,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 22:08:16,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:08:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 22:08:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=6367, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 22:08:16,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:08:16,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 1463 transitions, 38342 flow. Second operand has 86 states, 86 states have (on average 56.116279069767444) internal successors, (4826), 86 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:08:16,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:08:16,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:08:16,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:08:23,989 INFO L129 PetriNetUnfolder]: 1502/11689 cut-off events. [2021-12-17 22:08:23,990 INFO L130 PetriNetUnfolder]: For 6313582/6314427 co-relation queries the response was YES. [2021-12-17 22:08:24,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159711 conditions, 11689 events. 1502/11689 cut-off events. For 6313582/6314427 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 120710 event pairs, 0 based on Foata normal form. 199/10623 useless extension candidates. Maximal degree in co-relation 159390. Up to 2603 conditions per place. [2021-12-17 22:08:24,414 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 201 selfloop transitions, 1406 changer transitions 20/1672 dead transitions. [2021-12-17 22:08:24,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1043 places, 1672 transitions, 66027 flow [2021-12-17 22:08:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:08:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:08:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5629 transitions. [2021-12-17 22:08:24,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8205539358600583 [2021-12-17 22:08:24,418 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5629 transitions. [2021-12-17 22:08:24,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5629 transitions. [2021-12-17 22:08:24,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:08:24,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5629 transitions. [2021-12-17 22:08:24,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.43877551020408) internal successors, (5629), 98 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:08:24,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:08:24,427 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:08:24,427 INFO L186 Difference]: Start difference. First operand has 953 places, 1463 transitions, 38342 flow. Second operand 98 states and 5629 transitions. [2021-12-17 22:08:24,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1043 places, 1672 transitions, 66027 flow [2021-12-17 22:08:57,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1004 places, 1672 transitions, 61445 flow, removed 1785 selfloop flow, removed 39 redundant places. [2021-12-17 22:08:57,117 INFO L242 Difference]: Finished difference. Result has 1019 places, 1565 transitions, 41990 flow [2021-12-17 22:08:57,118 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=35408, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=41990, PETRI_PLACES=1019, PETRI_TRANSITIONS=1565} [2021-12-17 22:08:57,118 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 949 predicate places. [2021-12-17 22:08:57,118 INFO L470 AbstractCegarLoop]: Abstraction has has 1019 places, 1565 transitions, 41990 flow [2021-12-17 22:08:57,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.116279069767444) internal successors, (4826), 86 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:08:57,120 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:08:57,120 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:08:57,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-17 22:08:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:08:57,335 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:08:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:08:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash -814029322, now seen corresponding path program 16 times [2021-12-17 22:08:57,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:08:57,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680284315] [2021-12-17 22:08:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:08:57,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:08:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:08:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:08:57,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:08:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680284315] [2021-12-17 22:08:57,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680284315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:08:57,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288296106] [2021-12-17 22:08:57,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:08:57,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:08:57,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:08:57,863 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:08:57,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 22:08:57,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:08:57,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:08:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:08:57,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:08:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:08:58,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:08:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:08:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288296106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:08:59,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:08:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 85 [2021-12-17 22:08:59,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41817691] [2021-12-17 22:08:59,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:08:59,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 22:08:59,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:08:59,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 22:08:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=6126, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 22:08:59,683 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:08:59,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1019 places, 1565 transitions, 41990 flow. Second operand has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:08:59,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:08:59,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:08:59,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:09:08,113 INFO L129 PetriNetUnfolder]: 1584/12334 cut-off events. [2021-12-17 22:09:08,113 INFO L130 PetriNetUnfolder]: For 6696461/6697765 co-relation queries the response was YES. [2021-12-17 22:09:08,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169615 conditions, 12334 events. 1584/12334 cut-off events. For 6696461/6697765 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 129192 event pairs, 0 based on Foata normal form. 211/11211 useless extension candidates. Maximal degree in co-relation 169285. Up to 2743 conditions per place. [2021-12-17 22:09:08,517 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 171 selfloop transitions, 1520 changer transitions 20/1756 dead transitions. [2021-12-17 22:09:08,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1109 places, 1756 transitions, 69459 flow [2021-12-17 22:09:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:09:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:09:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5632 transitions. [2021-12-17 22:09:08,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8209912536443149 [2021-12-17 22:09:08,536 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5632 transitions. [2021-12-17 22:09:08,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5632 transitions. [2021-12-17 22:09:08,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:09:08,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5632 transitions. [2021-12-17 22:09:08,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.46938775510204) internal successors, (5632), 98 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:08,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:08,544 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:08,544 INFO L186 Difference]: Start difference. First operand has 1019 places, 1565 transitions, 41990 flow. Second operand 98 states and 5632 transitions. [2021-12-17 22:09:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1109 places, 1756 transitions, 69459 flow [2021-12-17 22:09:44,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1059 places, 1756 transitions, 64700 flow, removed 1646 selfloop flow, removed 50 redundant places. [2021-12-17 22:09:44,558 INFO L242 Difference]: Finished difference. Result has 1076 places, 1649 transitions, 45145 flow [2021-12-17 22:09:44,559 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=38719, PETRI_DIFFERENCE_MINUEND_PLACES=962, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=45145, PETRI_PLACES=1076, PETRI_TRANSITIONS=1649} [2021-12-17 22:09:44,560 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 1006 predicate places. [2021-12-17 22:09:44,560 INFO L470 AbstractCegarLoop]: Abstraction has has 1076 places, 1649 transitions, 45145 flow [2021-12-17 22:09:44,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:44,561 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:09:44,561 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:09:44,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-17 22:09:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:09:44,775 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:09:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:09:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1882868772, now seen corresponding path program 17 times [2021-12-17 22:09:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:09:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553373000] [2021-12-17 22:09:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:09:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:09:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:09:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:09:45,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:09:45,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553373000] [2021-12-17 22:09:45,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553373000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:09:45,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000138727] [2021-12-17 22:09:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:09:45,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:09:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:09:45,362 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:09:45,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 22:09:45,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-17 22:09:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:09:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:09:45,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:09:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:09:45,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:09:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:09:47,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000138727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:09:47,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:09:47,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-17 22:09:47,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93537504] [2021-12-17 22:09:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:09:47,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 22:09:47,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:09:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 22:09:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1183, Invalid=6127, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 22:09:47,048 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:09:47,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1076 places, 1649 transitions, 45145 flow. Second operand has 86 states, 86 states have (on average 56.116279069767444) internal successors, (4826), 86 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:47,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:09:47,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:09:47,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:09:55,947 INFO L129 PetriNetUnfolder]: 1641/12776 cut-off events. [2021-12-17 22:09:55,947 INFO L130 PetriNetUnfolder]: For 7084813/7085726 co-relation queries the response was YES. [2021-12-17 22:09:56,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176766 conditions, 12776 events. 1641/12776 cut-off events. For 7084813/7085726 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 134629 event pairs, 0 based on Foata normal form. 229/11626 useless extension candidates. Maximal degree in co-relation 176425. Up to 2827 conditions per place. [2021-12-17 22:09:56,314 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 150 selfloop transitions, 1600 changer transitions 20/1815 dead transitions. [2021-12-17 22:09:56,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1166 places, 1815 transitions, 72138 flow [2021-12-17 22:09:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:09:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:09:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5639 transitions. [2021-12-17 22:09:56,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8220116618075802 [2021-12-17 22:09:56,318 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5639 transitions. [2021-12-17 22:09:56,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5639 transitions. [2021-12-17 22:09:56,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:09:56,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5639 transitions. [2021-12-17 22:09:56,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.54081632653061) internal successors, (5639), 98 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:56,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:56,326 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:09:56,326 INFO L186 Difference]: Start difference. First operand has 1076 places, 1649 transitions, 45145 flow. Second operand 98 states and 5639 transitions. [2021-12-17 22:09:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1166 places, 1815 transitions, 72138 flow [2021-12-17 22:10:32,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1109 places, 1815 transitions, 67115 flow, removed 1606 selfloop flow, removed 57 redundant places. [2021-12-17 22:10:32,196 INFO L242 Difference]: Finished difference. Result has 1128 places, 1708 transitions, 47414 flow [2021-12-17 22:10:32,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=41540, PETRI_DIFFERENCE_MINUEND_PLACES=1012, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=47414, PETRI_PLACES=1128, PETRI_TRANSITIONS=1708} [2021-12-17 22:10:32,198 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 1058 predicate places. [2021-12-17 22:10:32,198 INFO L470 AbstractCegarLoop]: Abstraction has has 1128 places, 1708 transitions, 47414 flow [2021-12-17 22:10:32,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.116279069767444) internal successors, (4826), 86 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:10:32,199 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:10:32,199 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:10:32,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 22:10:32,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:10:32,404 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:10:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:10:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1161051854, now seen corresponding path program 18 times [2021-12-17 22:10:32,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:10:32,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801934985] [2021-12-17 22:10:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:10:32,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:10:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:10:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:10:32,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:10:32,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801934985] [2021-12-17 22:10:32,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801934985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:10:32,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983489260] [2021-12-17 22:10:32,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 22:10:32,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:10:32,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:10:32,949 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:10:32,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 22:10:33,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 22:10:33,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:10:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 22:10:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:10:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:10:33,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:10:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:10:34,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983489260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:10:34,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:10:34,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 85 [2021-12-17 22:10:34,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931011626] [2021-12-17 22:10:34,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:10:34,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-17 22:10:34,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:10:34,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-17 22:10:34,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1518, Invalid=5622, Unknown=0, NotChecked=0, Total=7140 [2021-12-17 22:10:34,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:10:34,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1128 places, 1708 transitions, 47414 flow. Second operand has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:10:34,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:10:34,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:10:34,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:10:44,963 INFO L129 PetriNetUnfolder]: 1688/13056 cut-off events. [2021-12-17 22:10:44,963 INFO L130 PetriNetUnfolder]: For 7438802/7439897 co-relation queries the response was YES. [2021-12-17 22:10:45,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183622 conditions, 13056 events. 1688/13056 cut-off events. For 7438802/7439897 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 137699 event pairs, 0 based on Foata normal form. 237/11887 useless extension candidates. Maximal degree in co-relation 183268. Up to 2883 conditions per place. [2021-12-17 22:10:45,625 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 143 selfloop transitions, 1646 changer transitions 20/1854 dead transitions. [2021-12-17 22:10:45,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 1854 transitions, 74884 flow [2021-12-17 22:10:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-17 22:10:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-17 22:10:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5650 transitions. [2021-12-17 22:10:45,632 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8236151603498543 [2021-12-17 22:10:45,632 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5650 transitions. [2021-12-17 22:10:45,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5650 transitions. [2021-12-17 22:10:45,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:10:45,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5650 transitions. [2021-12-17 22:10:45,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.6530612244898) internal successors, (5650), 98 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:10:45,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:10:45,641 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:10:45,642 INFO L186 Difference]: Start difference. First operand has 1128 places, 1708 transitions, 47414 flow. Second operand 98 states and 5650 transitions. [2021-12-17 22:10:45,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1218 places, 1854 transitions, 74884 flow [2021-12-17 22:11:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1153 places, 1854 transitions, 69693 flow, removed 1542 selfloop flow, removed 65 redundant places. [2021-12-17 22:11:27,733 INFO L242 Difference]: Finished difference. Result has 1172 places, 1741 transitions, 49591 flow [2021-12-17 22:11:27,734 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=43701, PETRI_DIFFERENCE_MINUEND_PLACES=1056, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=49591, PETRI_PLACES=1172, PETRI_TRANSITIONS=1741} [2021-12-17 22:11:27,734 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 1102 predicate places. [2021-12-17 22:11:27,735 INFO L470 AbstractCegarLoop]: Abstraction has has 1172 places, 1741 transitions, 49591 flow [2021-12-17 22:11:27,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:11:27,736 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:11:27,736 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:11:27,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 22:11:27,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 22:11:27,953 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:11:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:11:27,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2103398278, now seen corresponding path program 19 times [2021-12-17 22:11:27,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:11:27,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857603154] [2021-12-17 22:11:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:11:27,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:11:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:11:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:11:28,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:11:28,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857603154] [2021-12-17 22:11:28,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857603154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:11:28,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003794962] [2021-12-17 22:11:28,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 22:11:28,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:11:28,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:11:28,561 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:11:28,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 22:11:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:11:28,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:11:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:11:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:11:29,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:11:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:11:30,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003794962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:11:30,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:11:30,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-17 22:11:30,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826781291] [2021-12-17 22:11:30,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:11:30,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-17 22:11:30,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:11:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-17 22:11:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1662, Invalid=5648, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 22:11:30,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-17 22:11:30,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1172 places, 1741 transitions, 49591 flow. Second operand has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:11:30,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:11:30,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-17 22:11:30,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:11:43,066 INFO L129 PetriNetUnfolder]: 1680/12989 cut-off events. [2021-12-17 22:11:43,066 INFO L130 PetriNetUnfolder]: For 7634607/7635836 co-relation queries the response was YES. [2021-12-17 22:11:44,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185224 conditions, 12989 events. 1680/12989 cut-off events. For 7634607/7635836 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 136937 event pairs, 0 based on Foata normal form. 248/11840 useless extension candidates. Maximal degree in co-relation 184859. Up to 2871 conditions per place. [2021-12-17 22:11:44,326 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 132 selfloop transitions, 1658 changer transitions 19/1854 dead transitions. [2021-12-17 22:11:44,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1257 places, 1854 transitions, 75268 flow [2021-12-17 22:11:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-17 22:11:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-12-17 22:11:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5357 transitions. [2021-12-17 22:11:44,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8228878648233487 [2021-12-17 22:11:44,331 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5357 transitions. [2021-12-17 22:11:44,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5357 transitions. [2021-12-17 22:11:44,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:11:44,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5357 transitions. [2021-12-17 22:11:44,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 57.60215053763441) internal successors, (5357), 93 states have internal predecessors, (5357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:11:44,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 70.0) internal successors, (6580), 94 states have internal predecessors, (6580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:11:44,358 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 70.0) internal successors, (6580), 94 states have internal predecessors, (6580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:11:44,371 INFO L186 Difference]: Start difference. First operand has 1172 places, 1741 transitions, 49591 flow. Second operand 93 states and 5357 transitions. [2021-12-17 22:11:44,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1257 places, 1854 transitions, 75268 flow [2021-12-17 22:12:37,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1174 places, 1854 transitions, 68687 flow, removed 1884 selfloop flow, removed 83 redundant places. [2021-12-17 22:12:37,207 INFO L242 Difference]: Finished difference. Result has 1185 places, 1749 transitions, 49720 flow [2021-12-17 22:12:37,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=45092, PETRI_DIFFERENCE_MINUEND_PLACES=1082, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=49720, PETRI_PLACES=1185, PETRI_TRANSITIONS=1749} [2021-12-17 22:12:37,210 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 1115 predicate places. [2021-12-17 22:12:37,211 INFO L470 AbstractCegarLoop]: Abstraction has has 1185 places, 1749 transitions, 49720 flow [2021-12-17 22:12:37,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:12:37,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:12:37,211 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:12:37,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 22:12:37,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 22:12:37,427 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:12:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:12:37,428 INFO L85 PathProgramCache]: Analyzing trace with hash -82113532, now seen corresponding path program 20 times [2021-12-17 22:12:37,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:12:37,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873852746] [2021-12-17 22:12:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:12:37,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:12:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:12:37,488 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 22:12:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:12:37,602 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 22:12:37,603 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 22:12:37,603 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-17 22:12:37,605 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-17 22:12:37,605 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-17 22:12:37,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 22:12:37,608 INFO L732 BasicCegarLoop]: Path program histogram: [20, 2, 2, 2, 1] [2021-12-17 22:12:37,611 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-17 22:12:37,611 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 22:12:37,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 10:12:37 BasicIcfg [2021-12-17 22:12:37,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 22:12:37,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 22:12:37,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 22:12:37,731 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 22:12:37,732 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:05:16" (3/4) ... [2021-12-17 22:12:37,733 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 22:12:37,858 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 22:12:37,858 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 22:12:37,859 INFO L158 Benchmark]: Toolchain (without parser) took 442663.02ms. Allocated memory was 92.3MB in the beginning and 6.7GB in the end (delta: 6.6GB). Free memory was 61.6MB in the beginning and 1.6GB in the end (delta: -1.6GB). Peak memory consumption was 5.1GB. Max. memory is 16.1GB. [2021-12-17 22:12:37,859 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 49.0MB in the beginning and 48.9MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 22:12:37,859 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.75ms. Allocated memory is still 92.3MB. Free memory was 61.4MB in the beginning and 58.9MB in the end (delta: 2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 22:12:37,860 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.53ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 56.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:12:37,860 INFO L158 Benchmark]: Boogie Preprocessor took 42.66ms. Allocated memory is still 92.3MB. Free memory was 56.9MB in the beginning and 55.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 22:12:37,860 INFO L158 Benchmark]: RCFGBuilder took 367.36ms. Allocated memory was 92.3MB in the beginning and 123.7MB in the end (delta: 31.5MB). Free memory was 55.4MB in the beginning and 100.8MB in the end (delta: -45.3MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2021-12-17 22:12:37,860 INFO L158 Benchmark]: TraceAbstraction took 441661.22ms. Allocated memory was 123.7MB in the beginning and 6.7GB in the end (delta: 6.6GB). Free memory was 100.2MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 5.0GB. Max. memory is 16.1GB. [2021-12-17 22:12:37,861 INFO L158 Benchmark]: Witness Printer took 127.15ms. Allocated memory is still 6.7GB. Free memory was 1.7GB in the beginning and 1.6GB in the end (delta: 40.9MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2021-12-17 22:12:37,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 49.0MB in the beginning and 48.9MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.75ms. Allocated memory is still 92.3MB. Free memory was 61.4MB in the beginning and 58.9MB in the end (delta: 2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.53ms. Allocated memory is still 92.3MB. Free memory was 58.9MB in the beginning and 56.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.66ms. Allocated memory is still 92.3MB. Free memory was 56.9MB in the beginning and 55.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 367.36ms. Allocated memory was 92.3MB in the beginning and 123.7MB in the end (delta: 31.5MB). Free memory was 55.4MB in the beginning and 100.8MB in the end (delta: -45.3MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * TraceAbstraction took 441661.22ms. Allocated memory was 123.7MB in the beginning and 6.7GB in the end (delta: 6.6GB). Free memory was 100.2MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 5.0GB. Max. memory is 16.1GB. * Witness Printer took 127.15ms. Allocated memory is still 6.7GB. Free memory was 1.7GB in the beginning and 1.6GB in the end (delta: 40.9MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=1] [L716] 0 int condI = i >= (2*20 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=9, id1={5:0}, id2={3:0}, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=6, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=10] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=9] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=9, k=11] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=9, k=11] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=11] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=10] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=10] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=11] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=11] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=11] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=11, k=12] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=12] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=12] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=12, k=12] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=12] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=12] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=13] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=14] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=14] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=13, k=14] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=14] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=14] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=15] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=14, k=15] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=15] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=16] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=15, k=16] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=16] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=17] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=16, k=17] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=16] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=17] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=17] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=18] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=17, k=18] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=18, k=18] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L696] COND TRUE 1 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=18, k=19] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L704] COND TRUE 2 k < 20 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L719] 0 int condJ = j >= (2*20 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=19, k=19] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 441.4s, OverallIterations: 27, TraceHistogramMax: 20, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 400.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3170 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3170 mSDsluCounter, 554 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 916 mSDsCounter, 7983 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7508 IncrementalHoareTripleChecker+Invalid, 15491 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7983 mSolverCounterUnsat, 110 mSDtfsCounter, 7508 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8738 GetRequests, 6090 SyntacticMatches, 54 SemanticMatches, 2594 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124385 ImplicationChecksByTransitivity, 40.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49720occurred in iteration=26, InterpolantAutomatonStates: 1575, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 33.8s InterpolantComputationTime, 7138 NumberOfCodeBlocks, 7125 NumberOfCodeBlocksAsserted, 192 NumberOfCheckSat, 10190 ConstructedInterpolants, 0 QuantifiedInterpolants, 46680 SizeOfPredicates, 547 NumberOfNonLiveVariables, 6588 ConjunctsInSsa, 677 ConjunctsInUnsatCore, 68 InterpolantComputations, 5 PerfectInterpolantSequences, 82/60045 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-17 22:12:37,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE