./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-1.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-longer-1.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 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:42:50,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:42:50,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:42:50,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:42:50,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:42:50,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:42:50,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:42:50,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:42:50,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:42:50,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:42:50,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:42:50,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:42:50,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:42:50,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:42:50,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:42:50,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:42:50,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:42:50,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:42:50,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:42:50,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:42:50,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:42:50,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:42:50,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:42:50,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:42:50,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:42:50,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:42:50,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:42:50,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:42:50,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:42:50,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:42:50,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:42:50,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:42:50,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:42:50,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:42:50,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:42:50,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:42:50,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:42:50,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:42:50,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:42:50,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:42:50,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:42:50,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:42:50,305 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:42:50,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:42:50,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:42:50,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:42:50,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:42:50,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:42:50,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:42:50,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:42:50,308 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:42:50,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:42:50,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:42:50,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:42:50,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:42:50,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:42:50,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:42:50,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:42:50,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:42:50,310 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:42:50,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:42:50,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:42:50,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:42:50,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:42:50,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:42:50,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:42:50,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:42:50,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:42:50,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:42:50,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:42:50,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:42:50,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:42:50,313 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:42:50,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:42:50,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:42:50,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:42:50,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2021-12-16 02:42:50,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:42:50,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:42:50,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:42:50,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:42:50,552 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:42:50,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2021-12-16 02:42:50,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872baf0a9/a2731d02c2fb4adea6ad8c1d70c12a0a/FLAG3661a76de [2021-12-16 02:42:51,020 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:42:51,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2021-12-16 02:42:51,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872baf0a9/a2731d02c2fb4adea6ad8c1d70c12a0a/FLAG3661a76de [2021-12-16 02:42:51,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872baf0a9/a2731d02c2fb4adea6ad8c1d70c12a0a [2021-12-16 02:42:51,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:42:51,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:42:51,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:42:51,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:42:51,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:42:51,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5423647e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51, skipping insertion in model container [2021-12-16 02:42:51,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:42:51,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:42:51,691 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-longer-1.i[30961,30974] [2021-12-16 02:42:51,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:42:51,702 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:42:51,740 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-longer-1.i[30961,30974] [2021-12-16 02:42:51,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:42:51,775 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:42:51,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51 WrapperNode [2021-12-16 02:42:51,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:42:51,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:42:51,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:42:51,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:42:51,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,829 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-12-16 02:42:51,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:42:51,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:42:51,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:42:51,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:42:51,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:42:51,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:42:51,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:42:51,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:42:51,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (1/1) ... [2021-12-16 02:42:51,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:42:51,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:51,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 02:42:51,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 02:42:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-12-16 02:42:51,947 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-12-16 02:42:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-12-16 02:42:51,947 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-12-16 02:42:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 02:42:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 02:42:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:42:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 02:42:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 02:42:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:42:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 02:42:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:42:51,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:42:51,950 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 02:42:52,084 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:42:52,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:42:52,223 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:42:52,228 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:42:52,228 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 02:42:52,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:42:52 BoogieIcfgContainer [2021-12-16 02:42:52,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:42:52,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:42:52,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:42:52,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:42:52,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:42:51" (1/3) ... [2021-12-16 02:42:52,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec2e8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:42:52, skipping insertion in model container [2021-12-16 02:42:52,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:51" (2/3) ... [2021-12-16 02:42:52,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec2e8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:42:52, skipping insertion in model container [2021-12-16 02:42:52,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:42:52" (3/3) ... [2021-12-16 02:42:52,238 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-12-16 02:42:52,253 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 02:42:52,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:42:52,254 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 02:42:52,254 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 02:42:52,287 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,288 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,288 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,288 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,288 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,295 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,295 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,295 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,296 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,296 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,297 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,297 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,298 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,298 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,298 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,298 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,298 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,298 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,299 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,299 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,300 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,300 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,300 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,301 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,301 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,301 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,301 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,301 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,303 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,303 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,303 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,303 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,303 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,304 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,304 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,304 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,304 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,304 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,305 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,305 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,305 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,305 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,305 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,306 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,306 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,306 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,306 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,306 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,307 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,307 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,307 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,307 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,308 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,308 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,313 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,313 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,313 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,314 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,314 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,314 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,320 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,321 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,321 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,322 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,322 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,322 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:52,322 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-16 02:42:52,374 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:42:52,384 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 02:42:52,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 02:42:52,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2021-12-16 02:42:52,443 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-12-16 02:42:52,443 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-16 02:42:52,448 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. [2021-12-16 02:42:52,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2021-12-16 02:42:52,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2021-12-16 02:42:52,475 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2021-12-16 02:42:52,476 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-16 02:42:52,477 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:52,478 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] [2021-12-16 02:42:52,481 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2021-12-16 02:42:52,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:52,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836544816] [2021-12-16 02:42:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:52,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:52,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836544816] [2021-12-16 02:42:52,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836544816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:52,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:52,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:42:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637915435] [2021-12-16 02:42:52,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:52,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:42:52,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:52,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:42:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:42:52,867 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:52,872 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) [2021-12-16 02:42:52,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:52,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:52,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:53,024 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2021-12-16 02:42:53,024 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 02:42:53,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 210 events. 42/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 816 event pairs, 3 based on Foata normal form. 46/240 useless extension candidates. Maximal degree in co-relation 257. Up to 28 conditions per place. [2021-12-16 02:42:53,028 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2021-12-16 02:42:53,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2021-12-16 02:42:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:42:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-16 02:42:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2021-12-16 02:42:53,052 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2021-12-16 02:42:53,052 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2021-12-16 02:42:53,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2021-12-16 02:42:53,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:53,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2021-12-16 02:42:53,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:53,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:53,073 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:53,074 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2021-12-16 02:42:53,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2021-12-16 02:42:53,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 02:42:53,081 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2021-12-16 02:42:53,082 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2021-12-16 02:42:53,085 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2021-12-16 02:42:53,085 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2021-12-16 02:42:53,086 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) [2021-12-16 02:42:53,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:53,086 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] [2021-12-16 02:42:53,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:42:53,087 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2021-12-16 02:42:53,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:53,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587772626] [2021-12-16 02:42:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:53,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:53,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587772626] [2021-12-16 02:42:53,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587772626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:53,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:53,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:42:53,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140799945] [2021-12-16 02:42:53,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:53,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:42:53,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:53,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:42:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:42:53,235 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:53,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 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) [2021-12-16 02:42:53,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:53,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:53,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:53,407 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2021-12-16 02:42:53,408 INFO L130 PetriNetUnfolder]: For 111/114 co-relation queries the response was YES. [2021-12-16 02:42:53,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 111/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 848 event pairs, 0 based on Foata normal form. 3/205 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2021-12-16 02:42:53,411 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2021-12-16 02:42:53,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2021-12-16 02:42:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 02:42:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 02:42:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2021-12-16 02:42:53,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2021-12-16 02:42:53,418 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2021-12-16 02:42:53,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2021-12-16 02:42:53,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:53,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2021-12-16 02:42:53,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:53,422 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) [2021-12-16 02:42:53,423 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) [2021-12-16 02:42:53,423 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2021-12-16 02:42:53,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2021-12-16 02:42:53,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 02:42:53,429 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2021-12-16 02:42:53,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2021-12-16 02:42:53,430 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2021-12-16 02:42:53,430 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2021-12-16 02:42:53,431 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) [2021-12-16 02:42:53,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:53,431 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] [2021-12-16 02:42:53,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:42:53,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2021-12-16 02:42:53,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870281475] [2021-12-16 02:42:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:53,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:53,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870281475] [2021-12-16 02:42:53,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870281475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:53,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:53,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:42:53,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675043429] [2021-12-16 02:42:53,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:53,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:42:53,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:42:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:42:53,573 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:53,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 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) [2021-12-16 02:42:53,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:53,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:53,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:53,668 INFO L129 PetriNetUnfolder]: 37/188 cut-off events. [2021-12-16 02:42:53,669 INFO L130 PetriNetUnfolder]: For 251/258 co-relation queries the response was YES. [2021-12-16 02:42:53,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 188 events. 37/188 cut-off events. For 251/258 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 602 event pairs, 0 based on Foata normal form. 10/180 useless extension candidates. Maximal degree in co-relation 354. Up to 35 conditions per place. [2021-12-16 02:42:53,673 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2021-12-16 02:42:53,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2021-12-16 02:42:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:42:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 02:42:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-12-16 02:42:53,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-12-16 02:42:53,682 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-12-16 02:42:53,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-12-16 02:42:53,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:53,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-12-16 02:42:53,685 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) [2021-12-16 02:42:53,686 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) [2021-12-16 02:42:53,687 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) [2021-12-16 02:42:53,687 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2021-12-16 02:42:53,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2021-12-16 02:42:53,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2021-12-16 02:42:53,696 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2021-12-16 02:42:53,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2021-12-16 02:42:53,699 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2021-12-16 02:42:53,699 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2021-12-16 02:42:53,699 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) [2021-12-16 02:42:53,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:53,700 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] [2021-12-16 02:42:53,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:42:53,700 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2021-12-16 02:42:53,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632865790] [2021-12-16 02:42:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:53,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:53,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632865790] [2021-12-16 02:42:53,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632865790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:53,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:53,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:42:53,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470258110] [2021-12-16 02:42:53,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:53,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:42:53,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:42:53,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:42:53,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:53,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 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) [2021-12-16 02:42:53,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:53,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:53,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:53,960 INFO L129 PetriNetUnfolder]: 30/177 cut-off events. [2021-12-16 02:42:53,960 INFO L130 PetriNetUnfolder]: For 232/248 co-relation queries the response was YES. [2021-12-16 02:42:53,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 177 events. 30/177 cut-off events. For 232/248 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 550 event pairs, 0 based on Foata normal form. 16/176 useless extension candidates. Maximal degree in co-relation 365. Up to 32 conditions per place. [2021-12-16 02:42:53,963 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2021-12-16 02:42:53,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2021-12-16 02:42:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:42:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 02:42:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2021-12-16 02:42:53,966 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2021-12-16 02:42:53,966 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2021-12-16 02:42:53,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2021-12-16 02:42:53,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:53,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2021-12-16 02:42:53,968 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) [2021-12-16 02:42:53,969 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) [2021-12-16 02:42:53,970 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) [2021-12-16 02:42:53,970 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2021-12-16 02:42:53,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2021-12-16 02:42:53,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-12-16 02:42:53,977 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2021-12-16 02:42:53,977 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2021-12-16 02:42:53,978 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2021-12-16 02:42:53,979 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2021-12-16 02:42:53,979 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) [2021-12-16 02:42:53,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:53,979 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] [2021-12-16 02:42:53,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:42:53,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1734522485, now seen corresponding path program 1 times [2021-12-16 02:42:53,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:53,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948452034] [2021-12-16 02:42:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:53,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:54,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948452034] [2021-12-16 02:42:54,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948452034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:54,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:54,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:42:54,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036878452] [2021-12-16 02:42:54,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:54,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:42:54,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:42:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:42:54,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:54,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 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) [2021-12-16 02:42:54,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:54,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:54,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:54,243 INFO L129 PetriNetUnfolder]: 32/173 cut-off events. [2021-12-16 02:42:54,244 INFO L130 PetriNetUnfolder]: For 432/450 co-relation queries the response was YES. [2021-12-16 02:42:54,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 173 events. 32/173 cut-off events. For 432/450 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 519 event pairs, 1 based on Foata normal form. 15/173 useless extension candidates. Maximal degree in co-relation 404. Up to 36 conditions per place. [2021-12-16 02:42:54,246 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 19 changer transitions 8/91 dead transitions. [2021-12-16 02:42:54,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 91 transitions, 584 flow [2021-12-16 02:42:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:42:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 02:42:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2021-12-16 02:42:54,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-12-16 02:42:54,249 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2021-12-16 02:42:54,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2021-12-16 02:42:54,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:54,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2021-12-16 02:42:54,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:54,253 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) [2021-12-16 02:42:54,253 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) [2021-12-16 02:42:54,253 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 638 transitions. [2021-12-16 02:42:54,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 91 transitions, 584 flow [2021-12-16 02:42:54,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 498 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-12-16 02:42:54,258 INFO L242 Difference]: Finished difference. Result has 96 places, 77 transitions, 390 flow [2021-12-16 02:42:54,258 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2021-12-16 02:42:54,258 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2021-12-16 02:42:54,259 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 390 flow [2021-12-16 02:42:54,259 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) [2021-12-16 02:42:54,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:54,259 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] [2021-12-16 02:42:54,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:42:54,260 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 2 times [2021-12-16 02:42:54,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:54,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182659499] [2021-12-16 02:42:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182659499] [2021-12-16 02:42:54,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182659499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:54,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:54,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:42:54,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664386439] [2021-12-16 02:42:54,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:54,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:42:54,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:54,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:42:54,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:42:54,332 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:54,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 390 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) [2021-12-16 02:42:54,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:54,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:54,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:54,478 INFO L129 PetriNetUnfolder]: 33/189 cut-off events. [2021-12-16 02:42:54,479 INFO L130 PetriNetUnfolder]: For 497/515 co-relation queries the response was YES. [2021-12-16 02:42:54,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 189 events. 33/189 cut-off events. For 497/515 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 665 event pairs, 0 based on Foata normal form. 16/188 useless extension candidates. Maximal degree in co-relation 473. Up to 38 conditions per place. [2021-12-16 02:42:54,481 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 22 selfloop transitions, 17 changer transitions 5/89 dead transitions. [2021-12-16 02:42:54,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 604 flow [2021-12-16 02:42:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:42:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 02:42:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-12-16 02:42:54,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-12-16 02:42:54,484 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-12-16 02:42:54,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-12-16 02:42:54,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:54,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-12-16 02:42:54,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:54,488 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) [2021-12-16 02:42:54,488 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) [2021-12-16 02:42:54,488 INFO L186 Difference]: Start difference. First operand has 96 places, 77 transitions, 390 flow. Second operand 12 states and 695 transitions. [2021-12-16 02:42:54,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 604 flow [2021-12-16 02:42:54,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 563 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-12-16 02:42:54,493 INFO L242 Difference]: Finished difference. Result has 102 places, 80 transitions, 442 flow [2021-12-16 02:42:54,493 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=102, PETRI_TRANSITIONS=80} [2021-12-16 02:42:54,494 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 32 predicate places. [2021-12-16 02:42:54,494 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 80 transitions, 442 flow [2021-12-16 02:42:54,494 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) [2021-12-16 02:42:54,494 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:54,495 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] [2021-12-16 02:42:54,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:42:54,495 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:54,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1110018853, now seen corresponding path program 1 times [2021-12-16 02:42:54,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:54,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648986450] [2021-12-16 02:42:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:54,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648986450] [2021-12-16 02:42:54,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648986450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76398900] [2021-12-16 02:42:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:54,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:54,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:42:54,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:42:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 02:42:54,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:55,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76398900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:55,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:55,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-16 02:42:55,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386407618] [2021-12-16 02:42:55,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:55,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 02:42:55,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:55,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 02:42:55,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-16 02:42:55,046 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:55,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 80 transitions, 442 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) [2021-12-16 02:42:55,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:55,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:55,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:55,327 INFO L129 PetriNetUnfolder]: 51/288 cut-off events. [2021-12-16 02:42:55,327 INFO L130 PetriNetUnfolder]: For 900/931 co-relation queries the response was YES. [2021-12-16 02:42:55,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 288 events. 51/288 cut-off events. For 900/931 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1073 event pairs, 1 based on Foata normal form. 19/279 useless extension candidates. Maximal degree in co-relation 752. Up to 60 conditions per place. [2021-12-16 02:42:55,330 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 26 selfloop transitions, 34 changer transitions 14/119 dead transitions. [2021-12-16 02:42:55,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 1052 flow [2021-12-16 02:42:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 02:42:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-16 02:42:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2021-12-16 02:42:55,334 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2021-12-16 02:42:55,334 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2021-12-16 02:42:55,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2021-12-16 02:42:55,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:55,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2021-12-16 02:42:55,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:55,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:55,341 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:55,341 INFO L186 Difference]: Start difference. First operand has 102 places, 80 transitions, 442 flow. Second operand 20 states and 1159 transitions. [2021-12-16 02:42:55,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 1052 flow [2021-12-16 02:42:55,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 119 transitions, 1016 flow, removed 10 selfloop flow, removed 7 redundant places. [2021-12-16 02:42:55,347 INFO L242 Difference]: Finished difference. Result has 122 places, 96 transitions, 736 flow [2021-12-16 02:42:55,348 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=736, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2021-12-16 02:42:55,348 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 52 predicate places. [2021-12-16 02:42:55,349 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 736 flow [2021-12-16 02:42:55,349 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) [2021-12-16 02:42:55,349 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:55,349 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2021-12-16 02:42:55,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:42:55,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:55,567 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:55,568 INFO L85 PathProgramCache]: Analyzing trace with hash 936563082, now seen corresponding path program 1 times [2021-12-16 02:42:55,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:55,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547615151] [2021-12-16 02:42:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:55,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:55,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547615151] [2021-12-16 02:42:55,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547615151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419290704] [2021-12-16 02:42:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:55,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:55,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:42:55,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:42:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:55,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 02:42:55,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:55,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:56,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419290704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:56,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:56,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-16 02:42:56,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914006323] [2021-12-16 02:42:56,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:56,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 02:42:56,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 02:42:56,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:42:56,340 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:56,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 736 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:56,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:56,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:56,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:56,692 INFO L129 PetriNetUnfolder]: 73/413 cut-off events. [2021-12-16 02:42:56,693 INFO L130 PetriNetUnfolder]: For 2658/2717 co-relation queries the response was YES. [2021-12-16 02:42:56,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 413 events. 73/413 cut-off events. For 2658/2717 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1616 event pairs, 0 based on Foata normal form. 23/395 useless extension candidates. Maximal degree in co-relation 1341. Up to 96 conditions per place. [2021-12-16 02:42:56,699 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 55 selfloop transitions, 25 changer transitions 26/151 dead transitions. [2021-12-16 02:42:56,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 151 transitions, 1856 flow [2021-12-16 02:42:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 02:42:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-16 02:42:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2021-12-16 02:42:56,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-12-16 02:42:56,704 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2021-12-16 02:42:56,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2021-12-16 02:42:56,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:56,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2021-12-16 02:42:56,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:56,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:56,712 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:56,712 INFO L186 Difference]: Start difference. First operand has 122 places, 96 transitions, 736 flow. Second operand 25 states and 1450 transitions. [2021-12-16 02:42:56,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 151 transitions, 1856 flow [2021-12-16 02:42:56,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1453 flow, removed 180 selfloop flow, removed 13 redundant places. [2021-12-16 02:42:56,727 INFO L242 Difference]: Finished difference. Result has 147 places, 110 transitions, 841 flow [2021-12-16 02:42:56,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=841, PETRI_PLACES=147, PETRI_TRANSITIONS=110} [2021-12-16 02:42:56,730 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 77 predicate places. [2021-12-16 02:42:56,730 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 110 transitions, 841 flow [2021-12-16 02:42:56,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:56,730 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:56,731 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2021-12-16 02:42:56,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:42:56,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 02:42:56,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2021-12-16 02:42:56,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429517149] [2021-12-16 02:42:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:56,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:57,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429517149] [2021-12-16 02:42:57,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429517149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:57,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307805486] [2021-12-16 02:42:57,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:42:57,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:57,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:57,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:42:57,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:42:57,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:42:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:42:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 02:42:57,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:57,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:57,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307805486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:57,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:57,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-16 02:42:57,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680873233] [2021-12-16 02:42:57,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:57,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 02:42:57,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 02:42:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:42:57,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:57,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 110 transitions, 841 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:57,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:57,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:57,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:58,089 INFO L129 PetriNetUnfolder]: 129/779 cut-off events. [2021-12-16 02:42:58,090 INFO L130 PetriNetUnfolder]: For 12717/12861 co-relation queries the response was YES. [2021-12-16 02:42:58,095 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 779 events. 129/779 cut-off events. For 12717/12861 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4531 event pairs, 0 based on Foata normal form. 31/731 useless extension candidates. Maximal degree in co-relation 3104. Up to 160 conditions per place. [2021-12-16 02:42:58,099 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 81 changer transitions 26/210 dead transitions. [2021-12-16 02:42:58,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 210 transitions, 3273 flow [2021-12-16 02:42:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 02:42:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-16 02:42:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2021-12-16 02:42:58,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2021-12-16 02:42:58,104 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2021-12-16 02:42:58,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2021-12-16 02:42:58,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:58,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2021-12-16 02:42:58,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 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) [2021-12-16 02:42:58,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:58,116 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:58,116 INFO L186 Difference]: Start difference. First operand has 147 places, 110 transitions, 841 flow. Second operand 33 states and 1915 transitions. [2021-12-16 02:42:58,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 210 transitions, 3273 flow [2021-12-16 02:42:58,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2697 flow, removed 280 selfloop flow, removed 13 redundant places. [2021-12-16 02:42:58,144 INFO L242 Difference]: Finished difference. Result has 180 places, 156 transitions, 1674 flow [2021-12-16 02:42:58,144 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1674, PETRI_PLACES=180, PETRI_TRANSITIONS=156} [2021-12-16 02:42:58,145 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 110 predicate places. [2021-12-16 02:42:58,145 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 156 transitions, 1674 flow [2021-12-16 02:42:58,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:58,145 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:58,146 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2021-12-16 02:42:58,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:42:58,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:58,372 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2021-12-16 02:42:58,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:58,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36742572] [2021-12-16 02:42:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:58,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:58,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36742572] [2021-12-16 02:42:58,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36742572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:58,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145261407] [2021-12-16 02:42:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 02:42:58,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:58,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:42:58,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:42:58,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 02:42:58,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:42:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 02:42:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:58,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145261407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:58,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:58,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-16 02:42:58,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849117469] [2021-12-16 02:42:58,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:58,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 02:42:58,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 02:42:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:42:58,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:58,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 156 transitions, 1674 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:58,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:58,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:58,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:59,688 INFO L129 PetriNetUnfolder]: 167/1049 cut-off events. [2021-12-16 02:42:59,688 INFO L130 PetriNetUnfolder]: For 33425/33642 co-relation queries the response was YES. [2021-12-16 02:42:59,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5139 conditions, 1049 events. 167/1049 cut-off events. For 33425/33642 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7171 event pairs, 0 based on Foata normal form. 44/987 useless extension candidates. Maximal degree in co-relation 5048. Up to 212 conditions per place. [2021-12-16 02:42:59,705 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 128 changer transitions 31/266 dead transitions. [2021-12-16 02:42:59,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 266 transitions, 5247 flow [2021-12-16 02:42:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-16 02:42:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-16 02:42:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2021-12-16 02:42:59,709 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-12-16 02:42:59,709 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2021-12-16 02:42:59,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2021-12-16 02:42:59,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:59,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2021-12-16 02:42:59,717 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) [2021-12-16 02:42:59,721 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) [2021-12-16 02:42:59,722 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) [2021-12-16 02:42:59,722 INFO L186 Difference]: Start difference. First operand has 180 places, 156 transitions, 1674 flow. Second operand 36 states and 2085 transitions. [2021-12-16 02:42:59,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 266 transitions, 5247 flow [2021-12-16 02:42:59,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 266 transitions, 4417 flow, removed 399 selfloop flow, removed 18 redundant places. [2021-12-16 02:42:59,783 INFO L242 Difference]: Finished difference. Result has 210 places, 203 transitions, 2651 flow [2021-12-16 02:42:59,784 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2651, PETRI_PLACES=210, PETRI_TRANSITIONS=203} [2021-12-16 02:42:59,785 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 140 predicate places. [2021-12-16 02:42:59,785 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 203 transitions, 2651 flow [2021-12-16 02:42:59,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:42:59,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:59,786 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:42:59,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:00,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:00,010 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1986094188, now seen corresponding path program 4 times [2021-12-16 02:43:00,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:00,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956992252] [2021-12-16 02:43:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:00,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:00,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956992252] [2021-12-16 02:43:00,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956992252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:00,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128845555] [2021-12-16 02:43:00,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 02:43:00,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:00,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:00,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:00,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:43:00,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 02:43:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 02:43:00,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:00,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:00,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128845555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:00,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:00,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2021-12-16 02:43:00,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758359670] [2021-12-16 02:43:00,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:00,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 02:43:00,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 02:43:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-12-16 02:43:00,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:00,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 203 transitions, 2651 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:00,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:00,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:00,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:02,070 INFO L129 PetriNetUnfolder]: 264/1583 cut-off events. [2021-12-16 02:43:02,070 INFO L130 PetriNetUnfolder]: For 83404/83722 co-relation queries the response was YES. [2021-12-16 02:43:02,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9726 conditions, 1583 events. 264/1583 cut-off events. For 83404/83722 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 10973 event pairs, 1 based on Foata normal form. 57/1480 useless extension candidates. Maximal degree in co-relation 9623. Up to 330 conditions per place. [2021-12-16 02:43:02,099 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 222 changer transitions 38/376 dead transitions. [2021-12-16 02:43:02,099 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 376 transitions, 10583 flow [2021-12-16 02:43:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-16 02:43:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-16 02:43:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3011 transitions. [2021-12-16 02:43:02,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8271978021978021 [2021-12-16 02:43:02,104 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3011 transitions. [2021-12-16 02:43:02,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3011 transitions. [2021-12-16 02:43:02,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:02,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3011 transitions. [2021-12-16 02:43:02,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.90384615384615) internal successors, (3011), 52 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:02,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:02,117 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:02,117 INFO L186 Difference]: Start difference. First operand has 210 places, 203 transitions, 2651 flow. Second operand 52 states and 3011 transitions. [2021-12-16 02:43:02,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 376 transitions, 10583 flow [2021-12-16 02:43:02,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 376 transitions, 8479 flow, removed 1021 selfloop flow, removed 21 redundant places. [2021-12-16 02:43:02,256 INFO L242 Difference]: Finished difference. Result has 263 places, 313 transitions, 5525 flow [2021-12-16 02:43:02,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5525, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2021-12-16 02:43:02,257 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 193 predicate places. [2021-12-16 02:43:02,257 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 5525 flow [2021-12-16 02:43:02,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:02,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:02,258 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:02,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:02,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 02:43:02,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash -285761002, now seen corresponding path program 5 times [2021-12-16 02:43:02,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250968436] [2021-12-16 02:43:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:02,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:02,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:02,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250968436] [2021-12-16 02:43:02,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250968436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:02,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271701817] [2021-12-16 02:43:02,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 02:43:02,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:02,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:43:02,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-16 02:43:02,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 02:43:02,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:03,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271701817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:04,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:04,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2021-12-16 02:43:04,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205415113] [2021-12-16 02:43:04,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:04,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 02:43:04,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:04,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 02:43:04,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-12-16 02:43:04,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:04,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 5525 flow. Second operand has 29 states, 29 states have (on average 56.41379310344828) internal successors, (1636), 29 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:04,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:04,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:04,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:05,033 INFO L129 PetriNetUnfolder]: 274/1803 cut-off events. [2021-12-16 02:43:05,033 INFO L130 PetriNetUnfolder]: For 125520/125685 co-relation queries the response was YES. [2021-12-16 02:43:05,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11240 conditions, 1803 events. 274/1803 cut-off events. For 125520/125685 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12412 event pairs, 0 based on Foata normal form. 28/1637 useless extension candidates. Maximal degree in co-relation 11114. Up to 372 conditions per place. [2021-12-16 02:43:05,068 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 271 selfloop transitions, 47 changer transitions 26/389 dead transitions. [2021-12-16 02:43:05,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 389 transitions, 10759 flow [2021-12-16 02:43:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-16 02:43:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-16 02:43:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2134 transitions. [2021-12-16 02:43:05,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8239382239382239 [2021-12-16 02:43:05,078 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2134 transitions. [2021-12-16 02:43:05,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2134 transitions. [2021-12-16 02:43:05,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:05,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2134 transitions. [2021-12-16 02:43:05,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.67567567567568) internal successors, (2134), 37 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:05,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:05,104 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:05,104 INFO L186 Difference]: Start difference. First operand has 263 places, 313 transitions, 5525 flow. Second operand 37 states and 2134 transitions. [2021-12-16 02:43:05,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 389 transitions, 10759 flow [2021-12-16 02:43:05,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 389 transitions, 7120 flow, removed 1795 selfloop flow, removed 20 redundant places. [2021-12-16 02:43:05,363 INFO L242 Difference]: Finished difference. Result has 285 places, 331 transitions, 4313 flow [2021-12-16 02:43:05,363 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4313, PETRI_PLACES=285, PETRI_TRANSITIONS=331} [2021-12-16 02:43:05,364 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 215 predicate places. [2021-12-16 02:43:05,364 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 331 transitions, 4313 flow [2021-12-16 02:43:05,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.41379310344828) internal successors, (1636), 29 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:05,365 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:05,365 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:05,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:05,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:05,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:05,588 INFO L85 PathProgramCache]: Analyzing trace with hash -983699664, now seen corresponding path program 6 times [2021-12-16 02:43:05,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:05,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209016093] [2021-12-16 02:43:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:05,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:05,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:05,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209016093] [2021-12-16 02:43:05,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209016093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:05,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239204899] [2021-12-16 02:43:05,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 02:43:05,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:05,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:05,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 02:43:05,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-16 02:43:05,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 02:43:05,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:06,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:07,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239204899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:07,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:07,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 31 [2021-12-16 02:43:07,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240598730] [2021-12-16 02:43:07,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:07,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 02:43:07,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:07,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 02:43:07,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-12-16 02:43:07,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:07,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 331 transitions, 4313 flow. Second operand has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:07,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:07,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:07,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:08,356 INFO L129 PetriNetUnfolder]: 332/2277 cut-off events. [2021-12-16 02:43:08,357 INFO L130 PetriNetUnfolder]: For 122119/122479 co-relation queries the response was YES. [2021-12-16 02:43:08,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 2277 events. 332/2277 cut-off events. For 122119/122479 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16998 event pairs, 0 based on Foata normal form. 42/2077 useless extension candidates. Maximal degree in co-relation 11378. Up to 340 conditions per place. [2021-12-16 02:43:08,391 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 235 selfloop transitions, 169 changer transitions 26/475 dead transitions. [2021-12-16 02:43:08,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 475 transitions, 9585 flow [2021-12-16 02:43:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 02:43:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-16 02:43:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2021-12-16 02:43:08,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2021-12-16 02:43:08,395 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2021-12-16 02:43:08,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2021-12-16 02:43:08,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:08,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2021-12-16 02:43:08,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:08,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:08,407 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:08,407 INFO L186 Difference]: Start difference. First operand has 285 places, 331 transitions, 4313 flow. Second operand 45 states and 2593 transitions. [2021-12-16 02:43:08,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 475 transitions, 9585 flow [2021-12-16 02:43:08,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 475 transitions, 8826 flow, removed 354 selfloop flow, removed 23 redundant places. [2021-12-16 02:43:08,584 INFO L242 Difference]: Finished difference. Result has 318 places, 388 transitions, 5550 flow [2021-12-16 02:43:08,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5550, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2021-12-16 02:43:08,585 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 248 predicate places. [2021-12-16 02:43:08,585 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 5550 flow [2021-12-16 02:43:08,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:08,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:08,586 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:08,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:08,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:08,789 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:08,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1731536892, now seen corresponding path program 7 times [2021-12-16 02:43:08,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:08,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285836334] [2021-12-16 02:43:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:08,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:09,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:09,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285836334] [2021-12-16 02:43:09,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285836334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:09,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185521129] [2021-12-16 02:43:09,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 02:43:09,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:09,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:09,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 02:43:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 02:43:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:09,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:10,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185521129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:10,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:10,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2021-12-16 02:43:10,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255975456] [2021-12-16 02:43:10,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:10,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 02:43:10,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:10,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 02:43:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 02:43:10,123 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:10,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 5550 flow. Second operand has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:10,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:10,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:10,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:11,741 INFO L129 PetriNetUnfolder]: 397/2805 cut-off events. [2021-12-16 02:43:11,742 INFO L130 PetriNetUnfolder]: For 184595/184879 co-relation queries the response was YES. [2021-12-16 02:43:11,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 2805 events. 397/2805 cut-off events. For 184595/184879 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 22325 event pairs, 0 based on Foata normal form. 51/2560 useless extension candidates. Maximal degree in co-relation 15027. Up to 416 conditions per place. [2021-12-16 02:43:11,852 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 122 selfloop transitions, 348 changer transitions 26/541 dead transitions. [2021-12-16 02:43:11,852 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 541 transitions, 12338 flow [2021-12-16 02:43:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-16 02:43:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-16 02:43:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2942 transitions. [2021-12-16 02:43:11,856 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8240896358543417 [2021-12-16 02:43:11,856 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2942 transitions. [2021-12-16 02:43:11,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2942 transitions. [2021-12-16 02:43:11,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:11,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2942 transitions. [2021-12-16 02:43:11,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.68627450980392) internal successors, (2942), 51 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:11,864 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) [2021-12-16 02:43:11,864 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) [2021-12-16 02:43:11,865 INFO L186 Difference]: Start difference. First operand has 318 places, 388 transitions, 5550 flow. Second operand 51 states and 2942 transitions. [2021-12-16 02:43:11,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 541 transitions, 12338 flow [2021-12-16 02:43:12,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 541 transitions, 11012 flow, removed 576 selfloop flow, removed 31 redundant places. [2021-12-16 02:43:12,092 INFO L242 Difference]: Finished difference. Result has 352 places, 458 transitions, 7401 flow [2021-12-16 02:43:12,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7401, PETRI_PLACES=352, PETRI_TRANSITIONS=458} [2021-12-16 02:43:12,093 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 282 predicate places. [2021-12-16 02:43:12,093 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 458 transitions, 7401 flow [2021-12-16 02:43:12,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:12,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:12,094 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:12,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:12,307 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,SelfDestructingSolverStorable13 [2021-12-16 02:43:12,307 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -693522108, now seen corresponding path program 8 times [2021-12-16 02:43:12,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:12,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354568889] [2021-12-16 02:43:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:12,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:43:12,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:12,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354568889] [2021-12-16 02:43:12,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354568889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:12,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583670176] [2021-12-16 02:43:12,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:43:12,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:12,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:12,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 02:43:12,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:43:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 02:43:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:43:12,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:43:13,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583670176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:13,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:13,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2021-12-16 02:43:13,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372650443] [2021-12-16 02:43:13,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:13,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 02:43:13,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 02:43:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 02:43:13,301 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:13,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 458 transitions, 7401 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) [2021-12-16 02:43:13,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:13,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:13,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:15,070 INFO L129 PetriNetUnfolder]: 494/3392 cut-off events. [2021-12-16 02:43:15,070 INFO L130 PetriNetUnfolder]: For 296375/296794 co-relation queries the response was YES. [2021-12-16 02:43:15,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20583 conditions, 3392 events. 494/3392 cut-off events. For 296375/296794 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 27973 event pairs, 0 based on Foata normal form. 65/3099 useless extension candidates. Maximal degree in co-relation 20421. Up to 510 conditions per place. [2021-12-16 02:43:15,167 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 125 selfloop transitions, 443 changer transitions 26/639 dead transitions. [2021-12-16 02:43:15,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 639 transitions, 15782 flow [2021-12-16 02:43:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-16 02:43:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-16 02:43:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3356 transitions. [2021-12-16 02:43:15,173 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8266009852216749 [2021-12-16 02:43:15,173 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3356 transitions. [2021-12-16 02:43:15,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3356 transitions. [2021-12-16 02:43:15,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:15,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3356 transitions. [2021-12-16 02:43:15,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 57.86206896551724) internal successors, (3356), 58 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:15,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:15,186 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:15,186 INFO L186 Difference]: Start difference. First operand has 352 places, 458 transitions, 7401 flow. Second operand 58 states and 3356 transitions. [2021-12-16 02:43:15,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 639 transitions, 15782 flow [2021-12-16 02:43:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 639 transitions, 13590 flow, removed 1047 selfloop flow, removed 22 redundant places. [2021-12-16 02:43:15,660 INFO L242 Difference]: Finished difference. Result has 403 places, 538 transitions, 9409 flow [2021-12-16 02:43:15,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9409, PETRI_PLACES=403, PETRI_TRANSITIONS=538} [2021-12-16 02:43:15,661 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 333 predicate places. [2021-12-16 02:43:15,661 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 538 transitions, 9409 flow [2021-12-16 02:43:15,662 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) [2021-12-16 02:43:15,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:15,662 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:15,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 02:43:15,863 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,SelfDestructingSolverStorable14 [2021-12-16 02:43:15,864 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1774382462, now seen corresponding path program 9 times [2021-12-16 02:43:15,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348060911] [2021-12-16 02:43:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:15,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:16,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:16,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348060911] [2021-12-16 02:43:16,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348060911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:16,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780957361] [2021-12-16 02:43:16,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 02:43:16,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:16,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:16,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:16,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 02:43:16,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-16 02:43:16,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 02:43:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:16,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:16,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780957361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:16,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:16,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 27 [2021-12-16 02:43:16,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276512576] [2021-12-16 02:43:16,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:16,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 02:43:16,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 02:43:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-12-16 02:43:16,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:16,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 538 transitions, 9409 flow. Second operand has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:16,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:16,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:16,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:18,228 INFO L129 PetriNetUnfolder]: 518/3513 cut-off events. [2021-12-16 02:43:18,228 INFO L130 PetriNetUnfolder]: For 363973/364322 co-relation queries the response was YES. [2021-12-16 02:43:18,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23062 conditions, 3513 events. 518/3513 cut-off events. For 363973/364322 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29048 event pairs, 1 based on Foata normal form. 73/3217 useless extension candidates. Maximal degree in co-relation 22883. Up to 544 conditions per place. [2021-12-16 02:43:18,303 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 104 selfloop transitions, 455 changer transitions 14/618 dead transitions. [2021-12-16 02:43:18,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 15889 flow [2021-12-16 02:43:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-16 02:43:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-12-16 02:43:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2021-12-16 02:43:18,306 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8248571428571428 [2021-12-16 02:43:18,306 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2021-12-16 02:43:18,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2021-12-16 02:43:18,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:18,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2021-12-16 02:43:18,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:18,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:18,314 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:18,315 INFO L186 Difference]: Start difference. First operand has 403 places, 538 transitions, 9409 flow. Second operand 50 states and 2887 transitions. [2021-12-16 02:43:18,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 15889 flow [2021-12-16 02:43:19,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 618 transitions, 13835 flow, removed 776 selfloop flow, removed 38 redundant places. [2021-12-16 02:43:19,066 INFO L242 Difference]: Finished difference. Result has 418 places, 561 transitions, 10008 flow [2021-12-16 02:43:19,067 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10008, PETRI_PLACES=418, PETRI_TRANSITIONS=561} [2021-12-16 02:43:19,067 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 348 predicate places. [2021-12-16 02:43:19,067 INFO L470 AbstractCegarLoop]: Abstraction has has 418 places, 561 transitions, 10008 flow [2021-12-16 02:43:19,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:19,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:19,068 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:19,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-16 02:43:19,283 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,SelfDestructingSolverStorable15 [2021-12-16 02:43:19,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash -341929228, now seen corresponding path program 10 times [2021-12-16 02:43:19,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173739912] [2021-12-16 02:43:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:19,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:19,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:19,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173739912] [2021-12-16 02:43:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173739912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611133891] [2021-12-16 02:43:19,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 02:43:19,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:19,519 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:19,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 02:43:19,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 02:43:19,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 02:43:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:19,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:20,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611133891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:20,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:20,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2021-12-16 02:43:20,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350475655] [2021-12-16 02:43:20,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:20,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 02:43:20,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 02:43:20,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2021-12-16 02:43:20,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:20,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 561 transitions, 10008 flow. Second operand has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:20,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:20,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:20,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:22,281 INFO L129 PetriNetUnfolder]: 513/3563 cut-off events. [2021-12-16 02:43:22,281 INFO L130 PetriNetUnfolder]: For 392835/393119 co-relation queries the response was YES. [2021-12-16 02:43:22,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23441 conditions, 3563 events. 513/3563 cut-off events. For 392835/393119 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29666 event pairs, 0 based on Foata normal form. 89/3278 useless extension candidates. Maximal degree in co-relation 23259. Up to 540 conditions per place. [2021-12-16 02:43:22,341 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 115 selfloop transitions, 484 changer transitions 31/675 dead transitions. [2021-12-16 02:43:22,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 675 transitions, 17970 flow [2021-12-16 02:43:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-16 02:43:22,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-16 02:43:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3405 transitions. [2021-12-16 02:43:22,345 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8244552058111381 [2021-12-16 02:43:22,346 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3405 transitions. [2021-12-16 02:43:22,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3405 transitions. [2021-12-16 02:43:22,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:22,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3405 transitions. [2021-12-16 02:43:22,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.71186440677966) internal successors, (3405), 59 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:22,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:22,355 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:22,355 INFO L186 Difference]: Start difference. First operand has 418 places, 561 transitions, 10008 flow. Second operand 59 states and 3405 transitions. [2021-12-16 02:43:22,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 675 transitions, 17970 flow [2021-12-16 02:43:22,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 675 transitions, 16525 flow, removed 558 selfloop flow, removed 24 redundant places. [2021-12-16 02:43:22,917 INFO L242 Difference]: Finished difference. Result has 464 places, 574 transitions, 11051 flow [2021-12-16 02:43:22,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=11051, PETRI_PLACES=464, PETRI_TRANSITIONS=574} [2021-12-16 02:43:22,918 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 394 predicate places. [2021-12-16 02:43:22,918 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 574 transitions, 11051 flow [2021-12-16 02:43:22,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:22,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:22,919 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:22,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:23,119 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,SelfDestructingSolverStorable16 [2021-12-16 02:43:23,120 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1673947068, now seen corresponding path program 11 times [2021-12-16 02:43:23,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:23,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109995153] [2021-12-16 02:43:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:23,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 368 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 02:43:23,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:23,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109995153] [2021-12-16 02:43:23,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109995153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:23,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722574892] [2021-12-16 02:43:23,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 02:43:23,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:23,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:23,363 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:23,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 02:43:23,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-16 02:43:23,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 02:43:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 02:43:23,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:43:23,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722574892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:43:23,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:43:23,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-12-16 02:43:23,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374563074] [2021-12-16 02:43:23,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:43:23,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 02:43:23,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 02:43:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-16 02:43:23,687 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2021-12-16 02:43:23,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 574 transitions, 11051 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:23,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:23,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2021-12-16 02:43:23,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:28,511 INFO L129 PetriNetUnfolder]: 2729/14107 cut-off events. [2021-12-16 02:43:28,512 INFO L130 PetriNetUnfolder]: For 1261836/1262063 co-relation queries the response was YES. [2021-12-16 02:43:28,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83067 conditions, 14107 events. 2729/14107 cut-off events. For 1261836/1262063 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 167496 event pairs, 648 based on Foata normal form. 79/12622 useless extension candidates. Maximal degree in co-relation 82906. Up to 1994 conditions per place. [2021-12-16 02:43:28,726 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 614/614 dead transitions. [2021-12-16 02:43:28,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 614 transitions, 9999 flow [2021-12-16 02:43:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 02:43:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-16 02:43:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2000 transitions. [2021-12-16 02:43:28,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8658008658008658 [2021-12-16 02:43:28,729 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2000 transitions. [2021-12-16 02:43:28,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2000 transitions. [2021-12-16 02:43:28,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:28,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2000 transitions. [2021-12-16 02:43:28,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.60606060606061) internal successors, (2000), 33 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:28,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:28,734 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:28,735 INFO L186 Difference]: Start difference. First operand has 464 places, 574 transitions, 11051 flow. Second operand 33 states and 2000 transitions. [2021-12-16 02:43:28,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 614 transitions, 9999 flow [2021-12-16 02:43:29,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 614 transitions, 8386 flow, removed 197 selfloop flow, removed 73 redundant places. [2021-12-16 02:43:29,656 INFO L242 Difference]: Finished difference. Result has 407 places, 0 transitions, 0 flow [2021-12-16 02:43:29,656 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=0, PETRI_PLACES=407, PETRI_TRANSITIONS=0} [2021-12-16 02:43:29,656 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 337 predicate places. [2021-12-16 02:43:29,656 INFO L470 AbstractCegarLoop]: Abstraction has has 407 places, 0 transitions, 0 flow [2021-12-16 02:43:29,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:43:29,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-16 02:43:29,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-16 02:43:29,659 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-16 02:43:29,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-16 02:43:29,859 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,SelfDestructingSolverStorable17 [2021-12-16 02:43:29,863 INFO L732 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1, 1] [2021-12-16 02:43:29,864 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-16 02:43:29,864 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 02:43:29,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 02:43:29 BasicIcfg [2021-12-16 02:43:29,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 02:43:29,868 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 02:43:29,868 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 02:43:29,868 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 02:43:29,868 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:42:52" (3/4) ... [2021-12-16 02:43:29,870 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-16 02:43:29,875 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-12-16 02:43:29,875 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-12-16 02:43:29,878 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-16 02:43:29,878 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-16 02:43:29,878 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-16 02:43:29,878 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-16 02:43:29,921 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-16 02:43:29,921 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 02:43:29,922 INFO L158 Benchmark]: Toolchain (without parser) took 38537.25ms. Allocated memory was 96.5MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 65.5MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2021-12-16 02:43:29,922 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 96.5MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 02:43:29,922 INFO L158 Benchmark]: CACSL2BoogieTranslator took 390.97ms. Allocated memory is still 96.5MB. Free memory was 65.2MB in the beginning and 62.9MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 02:43:29,922 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.88ms. Allocated memory is still 96.5MB. Free memory was 62.9MB in the beginning and 61.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 02:43:29,923 INFO L158 Benchmark]: Boogie Preprocessor took 44.74ms. Allocated memory is still 96.5MB. Free memory was 61.1MB in the beginning and 59.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 02:43:29,923 INFO L158 Benchmark]: RCFGBuilder took 353.73ms. Allocated memory is still 96.5MB. Free memory was 59.7MB in the beginning and 48.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 02:43:29,923 INFO L158 Benchmark]: TraceAbstraction took 37636.37ms. Allocated memory was 96.5MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 48.2MB in the beginning and 3.7GB in the end (delta: -3.7GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2021-12-16 02:43:29,925 INFO L158 Benchmark]: Witness Printer took 53.48ms. Allocated memory is still 4.8GB. Free memory was 3.7GB in the beginning and 3.7GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 02:43:29,929 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 96.5MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 390.97ms. Allocated memory is still 96.5MB. Free memory was 65.2MB in the beginning and 62.9MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.88ms. Allocated memory is still 96.5MB. Free memory was 62.9MB in the beginning and 61.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.74ms. Allocated memory is still 96.5MB. Free memory was 61.1MB in the beginning and 59.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 353.73ms. Allocated memory is still 96.5MB. Free memory was 59.7MB in the beginning and 48.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 37636.37ms. Allocated memory was 96.5MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 48.2MB in the beginning and 3.7GB in the end (delta: -3.7GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Witness Printer took 53.48ms. Allocated memory is still 4.8GB. Free memory was 3.7GB in the beginning and 3.7GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 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: 37.5s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 22.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1063 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1063 mSDsluCounter, 312 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 489 mSDsCounter, 1624 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2890 IncrementalHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1624 mSolverCounterUnsat, 87 mSDtfsCounter, 2890 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2934 GetRequests, 2164 SyntacticMatches, 22 SemanticMatches, 748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12231 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11051occurred in iteration=17, InterpolantAutomatonStates: 558, 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: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 2640 NumberOfCodeBlocks, 2635 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3662 ConstructedInterpolants, 0 QuantifiedInterpolants, 14324 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2624 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 941/7204 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-16 02:43:29,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE