./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe002_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-wmm/safe002_tso.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 3743abf17a0d3db70a931712c22f305431bb6e8feb7b662539ff9c5190491352 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:50:35,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:50:35,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:50:35,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:50:35,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:50:35,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:50:35,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:50:35,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:50:35,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:50:35,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:50:35,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:50:35,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:50:35,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:50:35,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:50:35,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:50:35,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:50:35,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:50:35,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:50:35,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:50:35,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:50:35,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:50:35,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:50:35,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:50:35,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:50:35,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:50:35,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:50:35,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:50:35,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:50:35,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:50:35,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:50:35,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:50:35,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:50:35,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:50:35,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:50:35,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:50:35,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:50:35,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:50:35,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:50:35,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:50:35,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:50:35,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:50:35,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:50:35,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:50:35,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:50:35,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:50:35,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:50:35,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:50:35,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:50:35,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:50:35,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:50:35,262 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:50:35,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:50:35,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:50:35,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:50:35,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:50:35,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:50:35,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:50:35,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:50:35,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:50:35,264 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:50:35,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:50:35,264 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:50:35,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:50:35,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:50:35,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:50:35,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:50:35,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:50:35,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:50:35,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:50:35,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:50:35,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:50:35,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:50:35,266 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:50:35,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:50:35,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:50:35,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3743abf17a0d3db70a931712c22f305431bb6e8feb7b662539ff9c5190491352 [2021-12-28 02:50:35,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:50:35,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:50:35,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:50:35,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:50:35,562 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:50:35,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe002_tso.i [2021-12-28 02:50:35,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ebf23353/44131c1246c14ad19bac08a35ea4317c/FLAGaf488f93b [2021-12-28 02:50:36,065 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:50:36,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe002_tso.i [2021-12-28 02:50:36,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ebf23353/44131c1246c14ad19bac08a35ea4317c/FLAGaf488f93b [2021-12-28 02:50:36,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ebf23353/44131c1246c14ad19bac08a35ea4317c [2021-12-28 02:50:36,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:50:36,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:50:36,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:50:36,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:50:36,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:50:36,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419d1292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36, skipping insertion in model container [2021-12-28 02:50:36,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:50:36,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:50:36,568 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-wmm/safe002_tso.i[945,958] [2021-12-28 02:50:36,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:50:36,739 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:50:36,767 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-wmm/safe002_tso.i[945,958] [2021-12-28 02:50:36,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:50:36,853 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:50:36,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36 WrapperNode [2021-12-28 02:50:36,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:50:36,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:50:36,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:50:36,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:50:36,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,904 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-28 02:50:36,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:50:36,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:50:36,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:50:36,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:50:36,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:50:36,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:50:36,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:50:36,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:50:36,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (1/1) ... [2021-12-28 02:50:36,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:50:36,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:50:36,980 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) [2021-12-28 02:50:36,988 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 [2021-12-28 02:50:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 02:50:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 02:50:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:50:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 02:50:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 02:50:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-28 02:50:37,008 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-28 02:50:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-28 02:50:37,008 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-28 02:50:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-28 02:50:37,009 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-28 02:50:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:50:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 02:50:37,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:50:37,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:50:37,010 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 02:50:37,128 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:50:37,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:50:37,322 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:50:37,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:50:37,327 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 02:50:37,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:50:37 BoogieIcfgContainer [2021-12-28 02:50:37,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:50:37,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:50:37,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:50:37,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:50:37,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:50:36" (1/3) ... [2021-12-28 02:50:37,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bad3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:50:37, skipping insertion in model container [2021-12-28 02:50:37,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:50:36" (2/3) ... [2021-12-28 02:50:37,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bad3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:50:37, skipping insertion in model container [2021-12-28 02:50:37,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:50:37" (3/3) ... [2021-12-28 02:50:37,333 INFO L111 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2021-12-28 02:50:37,336 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 02:50:37,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:50:37,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 02:50:37,336 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 02:50:37,382 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,382 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,382 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,382 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,383 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,383 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,384 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,384 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,386 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,386 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,387 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,388 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,388 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,388 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,388 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,388 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,389 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,389 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,389 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,390 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,391 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,391 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,392 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,392 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,392 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,393 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,393 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,393 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,393 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,393 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,393 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,393 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,395 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,395 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,396 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,396 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,404 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,405 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,405 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,405 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,407 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,409 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,409 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,409 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,410 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,413 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,413 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,414 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:50:37,414 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-28 02:50:37,457 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:50:37,471 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 [2021-12-28 02:50:37,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-28 02:50:37,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 199 flow [2021-12-28 02:50:37,543 INFO L129 PetriNetUnfolder]: 2/89 cut-off events. [2021-12-28 02:50:37,544 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-28 02:50:37,546 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2021-12-28 02:50:37,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 199 flow [2021-12-28 02:50:37,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 159 flow [2021-12-28 02:50:37,576 INFO L129 PetriNetUnfolder]: 1/74 cut-off events. [2021-12-28 02:50:37,577 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-28 02:50:37,577 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:37,578 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:37,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash -669003802, now seen corresponding path program 1 times [2021-12-28 02:50:37,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:37,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257659195] [2021-12-28 02:50:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:37,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:37,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:37,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257659195] [2021-12-28 02:50:37,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257659195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:37,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:37,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:50:37,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260037865] [2021-12-28 02:50:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:38,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:50:38,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:38,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:50:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:50:38,031 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-28 02:50:38,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:38,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-28 02:50:38,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:38,300 INFO L129 PetriNetUnfolder]: 285/753 cut-off events. [2021-12-28 02:50:38,315 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-12-28 02:50:38,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 753 events. 285/753 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4283 event pairs, 11 based on Foata normal form. 30/752 useless extension candidates. Maximal degree in co-relation 1239. Up to 149 conditions per place. [2021-12-28 02:50:38,321 INFO L132 encePairwiseOnDemand]: 79/92 looper letters, 21 selfloop transitions, 8 changer transitions 47/132 dead transitions. [2021-12-28 02:50:38,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 425 flow [2021-12-28 02:50:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:50:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:50:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 992 transitions. [2021-12-28 02:50:38,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8294314381270903 [2021-12-28 02:50:38,348 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 992 transitions. [2021-12-28 02:50:38,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 992 transitions. [2021-12-28 02:50:38,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:38,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 992 transitions. [2021-12-28 02:50:38,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.3076923076923) internal successors, (992), 13 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,377 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,378 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 159 flow. Second operand 13 states and 992 transitions. [2021-12-28 02:50:38,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 425 flow [2021-12-28 02:50:38,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 132 transitions, 422 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-28 02:50:38,389 INFO L242 Difference]: Finished difference. Result has 105 places, 78 transitions, 248 flow [2021-12-28 02:50:38,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=248, PETRI_PLACES=105, PETRI_TRANSITIONS=78} [2021-12-28 02:50:38,392 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2021-12-28 02:50:38,393 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 78 transitions, 248 flow [2021-12-28 02:50:38,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,393 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:38,393 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:38,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:50:38,394 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash -245272025, now seen corresponding path program 1 times [2021-12-28 02:50:38,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:38,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376422916] [2021-12-28 02:50:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:38,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:38,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:38,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376422916] [2021-12-28 02:50:38,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376422916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:38,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:50:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112441981] [2021-12-28 02:50:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:38,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:50:38,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:50:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:50:38,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-28 02:50:38,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 78 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:38,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-28 02:50:38,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:38,735 INFO L129 PetriNetUnfolder]: 135/516 cut-off events. [2021-12-28 02:50:38,735 INFO L130 PetriNetUnfolder]: For 1050/1231 co-relation queries the response was YES. [2021-12-28 02:50:38,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1534 conditions, 516 events. 135/516 cut-off events. For 1050/1231 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2782 event pairs, 17 based on Foata normal form. 10/507 useless extension candidates. Maximal degree in co-relation 1481. Up to 139 conditions per place. [2021-12-28 02:50:38,740 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 27 selfloop transitions, 9 changer transitions 28/120 dead transitions. [2021-12-28 02:50:38,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 120 transitions, 660 flow [2021-12-28 02:50:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:50:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:50:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 970 transitions. [2021-12-28 02:50:38,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8110367892976589 [2021-12-28 02:50:38,743 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 970 transitions. [2021-12-28 02:50:38,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 970 transitions. [2021-12-28 02:50:38,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:38,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 970 transitions. [2021-12-28 02:50:38,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.61538461538461) internal successors, (970), 13 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,747 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,748 INFO L186 Difference]: Start difference. First operand has 105 places, 78 transitions, 248 flow. Second operand 13 states and 970 transitions. [2021-12-28 02:50:38,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 120 transitions, 660 flow [2021-12-28 02:50:38,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 600 flow, removed 28 selfloop flow, removed 4 redundant places. [2021-12-28 02:50:38,758 INFO L242 Difference]: Finished difference. Result has 116 places, 83 transitions, 341 flow [2021-12-28 02:50:38,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=341, PETRI_PLACES=116, PETRI_TRANSITIONS=83} [2021-12-28 02:50:38,759 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2021-12-28 02:50:38,759 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 83 transitions, 341 flow [2021-12-28 02:50:38,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,760 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:38,760 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:38,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:50:38,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash 744259556, now seen corresponding path program 1 times [2021-12-28 02:50:38,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:38,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491443149] [2021-12-28 02:50:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:38,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:38,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:38,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491443149] [2021-12-28 02:50:38,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491443149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:38,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:38,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:50:38,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658723933] [2021-12-28 02:50:38,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:38,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:50:38,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:50:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:50:38,880 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-28 02:50:38,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 83 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:38,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:38,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-28 02:50:38,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:39,064 INFO L129 PetriNetUnfolder]: 115/445 cut-off events. [2021-12-28 02:50:39,065 INFO L130 PetriNetUnfolder]: For 1636/1964 co-relation queries the response was YES. [2021-12-28 02:50:39,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 445 events. 115/445 cut-off events. For 1636/1964 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2275 event pairs, 4 based on Foata normal form. 12/443 useless extension candidates. Maximal degree in co-relation 1550. Up to 114 conditions per place. [2021-12-28 02:50:39,068 INFO L132 encePairwiseOnDemand]: 79/92 looper letters, 25 selfloop transitions, 19 changer transitions 34/134 dead transitions. [2021-12-28 02:50:39,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 134 transitions, 973 flow [2021-12-28 02:50:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:50:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:50:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 980 transitions. [2021-12-28 02:50:39,070 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8193979933110368 [2021-12-28 02:50:39,070 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 980 transitions. [2021-12-28 02:50:39,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 980 transitions. [2021-12-28 02:50:39,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:39,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 980 transitions. [2021-12-28 02:50:39,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.38461538461539) internal successors, (980), 13 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,075 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,075 INFO L186 Difference]: Start difference. First operand has 116 places, 83 transitions, 341 flow. Second operand 13 states and 980 transitions. [2021-12-28 02:50:39,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 134 transitions, 973 flow [2021-12-28 02:50:39,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 134 transitions, 871 flow, removed 48 selfloop flow, removed 10 redundant places. [2021-12-28 02:50:39,082 INFO L242 Difference]: Finished difference. Result has 121 places, 91 transitions, 495 flow [2021-12-28 02:50:39,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=495, PETRI_PLACES=121, PETRI_TRANSITIONS=91} [2021-12-28 02:50:39,083 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 37 predicate places. [2021-12-28 02:50:39,083 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 91 transitions, 495 flow [2021-12-28 02:50:39,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,083 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:39,083 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:39,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:50:39,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:39,084 INFO L85 PathProgramCache]: Analyzing trace with hash 215159614, now seen corresponding path program 1 times [2021-12-28 02:50:39,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:39,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302296296] [2021-12-28 02:50:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:39,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:39,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:39,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302296296] [2021-12-28 02:50:39,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302296296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:39,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:39,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:50:39,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390219718] [2021-12-28 02:50:39,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:39,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:50:39,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:50:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:50:39,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-28 02:50:39,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 91 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:39,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-28 02:50:39,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:39,303 INFO L129 PetriNetUnfolder]: 82/361 cut-off events. [2021-12-28 02:50:39,303 INFO L130 PetriNetUnfolder]: For 1873/2212 co-relation queries the response was YES. [2021-12-28 02:50:39,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 361 events. 82/361 cut-off events. For 1873/2212 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1733 event pairs, 6 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1396. Up to 100 conditions per place. [2021-12-28 02:50:39,306 INFO L132 encePairwiseOnDemand]: 79/92 looper letters, 18 selfloop transitions, 12 changer transitions 32/118 dead transitions. [2021-12-28 02:50:39,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 949 flow [2021-12-28 02:50:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:50:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-28 02:50:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 604 transitions. [2021-12-28 02:50:39,308 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8206521739130435 [2021-12-28 02:50:39,308 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 604 transitions. [2021-12-28 02:50:39,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 604 transitions. [2021-12-28 02:50:39,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:39,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 604 transitions. [2021-12-28 02:50:39,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 75.5) internal successors, (604), 8 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,312 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,312 INFO L186 Difference]: Start difference. First operand has 121 places, 91 transitions, 495 flow. Second operand 8 states and 604 transitions. [2021-12-28 02:50:39,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 949 flow [2021-12-28 02:50:39,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 118 transitions, 879 flow, removed 35 selfloop flow, removed 10 redundant places. [2021-12-28 02:50:39,320 INFO L242 Difference]: Finished difference. Result has 113 places, 82 transitions, 381 flow [2021-12-28 02:50:39,320 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=381, PETRI_PLACES=113, PETRI_TRANSITIONS=82} [2021-12-28 02:50:39,321 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2021-12-28 02:50:39,321 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 82 transitions, 381 flow [2021-12-28 02:50:39,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,321 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:39,321 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:39,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:50:39,322 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1082485261, now seen corresponding path program 1 times [2021-12-28 02:50:39,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:39,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912331076] [2021-12-28 02:50:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:39,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:39,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:39,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912331076] [2021-12-28 02:50:39,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912331076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:39,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:39,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:50:39,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606324981] [2021-12-28 02:50:39,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:39,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:50:39,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:39,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:50:39,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:50:39,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-28 02:50:39,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 82 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:39,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-28 02:50:39,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:39,496 INFO L129 PetriNetUnfolder]: 37/197 cut-off events. [2021-12-28 02:50:39,496 INFO L130 PetriNetUnfolder]: For 667/834 co-relation queries the response was YES. [2021-12-28 02:50:39,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 197 events. 37/197 cut-off events. For 667/834 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 632 event pairs, 6 based on Foata normal form. 7/195 useless extension candidates. Maximal degree in co-relation 672. Up to 49 conditions per place. [2021-12-28 02:50:39,497 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 22 selfloop transitions, 9 changer transitions 16/103 dead transitions. [2021-12-28 02:50:39,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 103 transitions, 656 flow [2021-12-28 02:50:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:50:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 02:50:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 743 transitions. [2021-12-28 02:50:39,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8076086956521739 [2021-12-28 02:50:39,499 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 743 transitions. [2021-12-28 02:50:39,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 743 transitions. [2021-12-28 02:50:39,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:39,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 743 transitions. [2021-12-28 02:50:39,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,502 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,502 INFO L186 Difference]: Start difference. First operand has 113 places, 82 transitions, 381 flow. Second operand 10 states and 743 transitions. [2021-12-28 02:50:39,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 103 transitions, 656 flow [2021-12-28 02:50:39,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 103 transitions, 579 flow, removed 13 selfloop flow, removed 11 redundant places. [2021-12-28 02:50:39,505 INFO L242 Difference]: Finished difference. Result has 116 places, 83 transitions, 367 flow [2021-12-28 02:50:39,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=367, PETRI_PLACES=116, PETRI_TRANSITIONS=83} [2021-12-28 02:50:39,505 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2021-12-28 02:50:39,506 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 83 transitions, 367 flow [2021-12-28 02:50:39,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.28571428571429) internal successors, (506), 7 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:39,506 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:39,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:50:39,506 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1036823899, now seen corresponding path program 1 times [2021-12-28 02:50:39,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:39,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532935534] [2021-12-28 02:50:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:39,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:39,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:39,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532935534] [2021-12-28 02:50:39,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532935534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:39,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:39,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:50:39,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531593402] [2021-12-28 02:50:39,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:39,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:50:39,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:50:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:50:39,571 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 92 [2021-12-28 02:50:39,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 83 transitions, 367 flow. Second operand has 7 states, 7 states have (on average 75.14285714285714) internal successors, (526), 7 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:39,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 92 [2021-12-28 02:50:39,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:39,637 INFO L129 PetriNetUnfolder]: 21/189 cut-off events. [2021-12-28 02:50:39,638 INFO L130 PetriNetUnfolder]: For 496/781 co-relation queries the response was YES. [2021-12-28 02:50:39,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 189 events. 21/189 cut-off events. For 496/781 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 657 event pairs, 11 based on Foata normal form. 3/185 useless extension candidates. Maximal degree in co-relation 575. Up to 40 conditions per place. [2021-12-28 02:50:39,639 INFO L132 encePairwiseOnDemand]: 84/92 looper letters, 16 selfloop transitions, 6 changer transitions 10/92 dead transitions. [2021-12-28 02:50:39,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 92 transitions, 509 flow [2021-12-28 02:50:39,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:50:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 02:50:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2021-12-28 02:50:39,641 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8322981366459627 [2021-12-28 02:50:39,641 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2021-12-28 02:50:39,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2021-12-28 02:50:39,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:39,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2021-12-28 02:50:39,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2021-12-28 02:50:39,644 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2021-12-28 02:50:39,644 INFO L186 Difference]: Start difference. First operand has 116 places, 83 transitions, 367 flow. Second operand 7 states and 536 transitions. [2021-12-28 02:50:39,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 92 transitions, 509 flow [2021-12-28 02:50:39,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 92 transitions, 476 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-12-28 02:50:39,648 INFO L242 Difference]: Finished difference. Result has 113 places, 80 transitions, 337 flow [2021-12-28 02:50:39,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=113, PETRI_TRANSITIONS=80} [2021-12-28 02:50:39,651 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2021-12-28 02:50:39,651 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 80 transitions, 337 flow [2021-12-28 02:50:39,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.14285714285714) internal successors, (526), 7 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,651 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:39,651 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:39,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:50:39,652 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2125553685, now seen corresponding path program 2 times [2021-12-28 02:50:39,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:39,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107210659] [2021-12-28 02:50:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:39,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:39,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:39,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107210659] [2021-12-28 02:50:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107210659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:39,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:39,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:50:39,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153747577] [2021-12-28 02:50:39,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:39,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:50:39,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:50:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:50:39,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-28 02:50:39,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 80 transitions, 337 flow. Second operand has 8 states, 8 states have (on average 72.125) internal successors, (577), 8 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:39,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-28 02:50:39,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:39,846 INFO L129 PetriNetUnfolder]: 16/141 cut-off events. [2021-12-28 02:50:39,847 INFO L130 PetriNetUnfolder]: For 422/594 co-relation queries the response was YES. [2021-12-28 02:50:39,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 141 events. 16/141 cut-off events. For 422/594 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 358 event pairs, 5 based on Foata normal form. 5/141 useless extension candidates. Maximal degree in co-relation 429. Up to 30 conditions per place. [2021-12-28 02:50:39,848 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 14 selfloop transitions, 5 changer transitions 17/91 dead transitions. [2021-12-28 02:50:39,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 503 flow [2021-12-28 02:50:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:50:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 02:50:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 663 transitions. [2021-12-28 02:50:39,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8007246376811594 [2021-12-28 02:50:39,850 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 663 transitions. [2021-12-28 02:50:39,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 663 transitions. [2021-12-28 02:50:39,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:39,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 663 transitions. [2021-12-28 02:50:39,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.66666666666667) internal successors, (663), 9 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,853 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,853 INFO L186 Difference]: Start difference. First operand has 113 places, 80 transitions, 337 flow. Second operand 9 states and 663 transitions. [2021-12-28 02:50:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 503 flow [2021-12-28 02:50:39,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 440 flow, removed 15 selfloop flow, removed 10 redundant places. [2021-12-28 02:50:39,856 INFO L242 Difference]: Finished difference. Result has 112 places, 73 transitions, 244 flow [2021-12-28 02:50:39,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=112, PETRI_TRANSITIONS=73} [2021-12-28 02:50:39,856 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 28 predicate places. [2021-12-28 02:50:39,856 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 73 transitions, 244 flow [2021-12-28 02:50:39,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.125) internal successors, (577), 8 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,857 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:39,857 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:39,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:50:39,857 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1615486883, now seen corresponding path program 3 times [2021-12-28 02:50:39,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:39,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013787422] [2021-12-28 02:50:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:39,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:39,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013787422] [2021-12-28 02:50:39,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013787422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:39,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:39,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:50:39,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201303121] [2021-12-28 02:50:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:39,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:50:39,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:50:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:50:39,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-28 02:50:39,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 73 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:39,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:39,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-28 02:50:39,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:40,032 INFO L129 PetriNetUnfolder]: 113/366 cut-off events. [2021-12-28 02:50:40,033 INFO L130 PetriNetUnfolder]: For 251/255 co-relation queries the response was YES. [2021-12-28 02:50:40,034 INFO L84 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 366 events. 113/366 cut-off events. For 251/255 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1750 event pairs, 14 based on Foata normal form. 8/359 useless extension candidates. Maximal degree in co-relation 765. Up to 90 conditions per place. [2021-12-28 02:50:40,035 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 14 selfloop transitions, 6 changer transitions 19/99 dead transitions. [2021-12-28 02:50:40,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 99 transitions, 376 flow [2021-12-28 02:50:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:50:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 02:50:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2021-12-28 02:50:40,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8647342995169082 [2021-12-28 02:50:40,037 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 716 transitions. [2021-12-28 02:50:40,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 716 transitions. [2021-12-28 02:50:40,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:40,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 716 transitions. [2021-12-28 02:50:40,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.55555555555556) internal successors, (716), 9 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,041 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,041 INFO L186 Difference]: Start difference. First operand has 112 places, 73 transitions, 244 flow. Second operand 9 states and 716 transitions. [2021-12-28 02:50:40,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 99 transitions, 376 flow [2021-12-28 02:50:40,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 334 flow, removed 8 selfloop flow, removed 13 redundant places. [2021-12-28 02:50:40,044 INFO L242 Difference]: Finished difference. Result has 106 places, 76 transitions, 258 flow [2021-12-28 02:50:40,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=258, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2021-12-28 02:50:40,044 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2021-12-28 02:50:40,045 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 258 flow [2021-12-28 02:50:40,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:40,045 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:40,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:50:40,046 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:40,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1611660066, now seen corresponding path program 1 times [2021-12-28 02:50:40,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:40,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967319225] [2021-12-28 02:50:40,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:40,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:40,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:40,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967319225] [2021-12-28 02:50:40,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967319225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:40,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:40,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:50:40,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653213227] [2021-12-28 02:50:40,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:40,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:50:40,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:50:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:50:40,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-28 02:50:40,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:40,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-28 02:50:40,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:40,216 INFO L129 PetriNetUnfolder]: 60/238 cut-off events. [2021-12-28 02:50:40,216 INFO L130 PetriNetUnfolder]: For 366/396 co-relation queries the response was YES. [2021-12-28 02:50:40,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 238 events. 60/238 cut-off events. For 366/396 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 868 event pairs, 4 based on Foata normal form. 12/245 useless extension candidates. Maximal degree in co-relation 689. Up to 79 conditions per place. [2021-12-28 02:50:40,217 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 14 selfloop transitions, 9 changer transitions 19/102 dead transitions. [2021-12-28 02:50:40,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 523 flow [2021-12-28 02:50:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:50:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 02:50:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 794 transitions. [2021-12-28 02:50:40,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8630434782608696 [2021-12-28 02:50:40,233 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 794 transitions. [2021-12-28 02:50:40,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 794 transitions. [2021-12-28 02:50:40,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:40,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 794 transitions. [2021-12-28 02:50:40,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.4) internal successors, (794), 10 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,236 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,236 INFO L186 Difference]: Start difference. First operand has 106 places, 76 transitions, 258 flow. Second operand 10 states and 794 transitions. [2021-12-28 02:50:40,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 523 flow [2021-12-28 02:50:40,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 102 transitions, 497 flow, removed 7 selfloop flow, removed 6 redundant places. [2021-12-28 02:50:40,238 INFO L242 Difference]: Finished difference. Result has 111 places, 79 transitions, 324 flow [2021-12-28 02:50:40,239 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=324, PETRI_PLACES=111, PETRI_TRANSITIONS=79} [2021-12-28 02:50:40,239 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2021-12-28 02:50:40,239 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 79 transitions, 324 flow [2021-12-28 02:50:40,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:40,240 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:40,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:50:40,240 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash -839518239, now seen corresponding path program 1 times [2021-12-28 02:50:40,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:40,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232149083] [2021-12-28 02:50:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:40,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:40,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:40,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232149083] [2021-12-28 02:50:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232149083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:40,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:40,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:50:40,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683565798] [2021-12-28 02:50:40,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:40,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:50:40,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:50:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:50:40,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-28 02:50:40,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 79 transitions, 324 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:40,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-28 02:50:40,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:40,422 INFO L129 PetriNetUnfolder]: 17/131 cut-off events. [2021-12-28 02:50:40,422 INFO L130 PetriNetUnfolder]: For 401/415 co-relation queries the response was YES. [2021-12-28 02:50:40,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 131 events. 17/131 cut-off events. For 401/415 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 258 event pairs, 0 based on Foata normal form. 10/141 useless extension candidates. Maximal degree in co-relation 400. Up to 31 conditions per place. [2021-12-28 02:50:40,423 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 8 selfloop transitions, 12 changer transitions 13/93 dead transitions. [2021-12-28 02:50:40,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 93 transitions, 520 flow [2021-12-28 02:50:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:50:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-28 02:50:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 860 transitions. [2021-12-28 02:50:40,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.849802371541502 [2021-12-28 02:50:40,425 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 860 transitions. [2021-12-28 02:50:40,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 860 transitions. [2021-12-28 02:50:40,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:40,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 860 transitions. [2021-12-28 02:50:40,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 78.18181818181819) internal successors, (860), 11 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,429 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,429 INFO L186 Difference]: Start difference. First operand has 111 places, 79 transitions, 324 flow. Second operand 11 states and 860 transitions. [2021-12-28 02:50:40,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 93 transitions, 520 flow [2021-12-28 02:50:40,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 93 transitions, 405 flow, removed 47 selfloop flow, removed 13 redundant places. [2021-12-28 02:50:40,432 INFO L242 Difference]: Finished difference. Result has 110 places, 79 transitions, 294 flow [2021-12-28 02:50:40,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=294, PETRI_PLACES=110, PETRI_TRANSITIONS=79} [2021-12-28 02:50:40,432 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 26 predicate places. [2021-12-28 02:50:40,433 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 79 transitions, 294 flow [2021-12-28 02:50:40,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:50:40,433 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:40,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:50:40,434 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:50:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:50:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash -485770676, now seen corresponding path program 1 times [2021-12-28 02:50:40,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:50:40,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862058126] [2021-12-28 02:50:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:50:40,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:50:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:50:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:50:40,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:50:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862058126] [2021-12-28 02:50:40,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862058126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:50:40,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:50:40,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:50:40,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891283357] [2021-12-28 02:50:40,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:50:40,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:50:40,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:50:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:50:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:50:40,491 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-28 02:50:40,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 79 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:50:40,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-28 02:50:40,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:50:40,558 INFO L129 PetriNetUnfolder]: 6/94 cut-off events. [2021-12-28 02:50:40,558 INFO L130 PetriNetUnfolder]: For 86/91 co-relation queries the response was YES. [2021-12-28 02:50:40,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 94 events. 6/94 cut-off events. For 86/91 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 196. Up to 11 conditions per place. [2021-12-28 02:50:40,558 INFO L132 encePairwiseOnDemand]: 86/92 looper letters, 0 selfloop transitions, 0 changer transitions 78/78 dead transitions. [2021-12-28 02:50:40,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 78 transitions, 320 flow [2021-12-28 02:50:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:50:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 02:50:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2021-12-28 02:50:40,560 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8369565217391305 [2021-12-28 02:50:40,560 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2021-12-28 02:50:40,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2021-12-28 02:50:40,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:50:40,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2021-12-28 02:50:40,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2021-12-28 02:50:40,562 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 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) [2021-12-28 02:50:40,562 INFO L186 Difference]: Start difference. First operand has 110 places, 79 transitions, 294 flow. Second operand 7 states and 539 transitions. [2021-12-28 02:50:40,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 78 transitions, 320 flow [2021-12-28 02:50:40,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 78 transitions, 232 flow, removed 23 selfloop flow, removed 16 redundant places. [2021-12-28 02:50:40,563 INFO L242 Difference]: Finished difference. Result has 94 places, 0 transitions, 0 flow [2021-12-28 02:50:40,563 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=94, PETRI_TRANSITIONS=0} [2021-12-28 02:50:40,564 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2021-12-28 02:50:40,564 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 0 transitions, 0 flow [2021-12-28 02:50:40,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:50:40,566 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-28 02:50:40,566 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-28 02:50:40,566 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-28 02:50:40,566 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-28 02:50:40,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:50:40,585 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:50:40,587 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-28 02:50:40,587 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 02:50:40,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 02:50:40 BasicIcfg [2021-12-28 02:50:40,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 02:50:40,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 02:50:40,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 02:50:40,590 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 02:50:40,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:50:37" (3/4) ... [2021-12-28 02:50:40,591 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-28 02:50:40,596 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-28 02:50:40,596 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-28 02:50:40,596 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-28 02:50:40,613 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-28 02:50:40,614 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-28 02:50:40,614 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-28 02:50:40,614 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-28 02:50:40,659 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-28 02:50:40,659 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 02:50:40,660 INFO L158 Benchmark]: Toolchain (without parser) took 4255.34ms. Allocated memory was 54.5MB in the beginning and 119.5MB in the end (delta: 65.0MB). Free memory was 29.9MB in the beginning and 41.1MB in the end (delta: -11.2MB). Peak memory consumption was 54.7MB. Max. memory is 16.1GB. [2021-12-28 02:50:40,660 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory was 36.6MB in the beginning and 36.6MB in the end (delta: 47.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:50:40,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 447.45ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.7MB in the beginning and 41.2MB in the end (delta: -11.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-12-28 02:50:40,660 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.48ms. Allocated memory is still 67.1MB. Free memory was 41.0MB in the beginning and 39.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 02:50:40,660 INFO L158 Benchmark]: Boogie Preprocessor took 35.12ms. Allocated memory is still 67.1MB. Free memory was 39.0MB in the beginning and 37.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 02:50:40,661 INFO L158 Benchmark]: RCFGBuilder took 386.83ms. Allocated memory is still 67.1MB. Free memory was 37.6MB in the beginning and 42.7MB in the end (delta: -5.1MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2021-12-28 02:50:40,661 INFO L158 Benchmark]: TraceAbstraction took 3259.79ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 42.2MB in the beginning and 44.2MB in the end (delta: -2.0MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. [2021-12-28 02:50:40,661 INFO L158 Benchmark]: Witness Printer took 69.81ms. Allocated memory is still 119.5MB. Free memory was 44.2MB in the beginning and 41.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 02:50:40,676 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory was 36.6MB in the beginning and 36.6MB in the end (delta: 47.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 447.45ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.7MB in the beginning and 41.2MB in the end (delta: -11.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.48ms. Allocated memory is still 67.1MB. Free memory was 41.0MB in the beginning and 39.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.12ms. Allocated memory is still 67.1MB. Free memory was 39.0MB in the beginning and 37.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 386.83ms. Allocated memory is still 67.1MB. Free memory was 37.6MB in the beginning and 42.7MB in the end (delta: -5.1MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * TraceAbstraction took 3259.79ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 42.2MB in the beginning and 44.2MB in the end (delta: -2.0MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. * Witness Printer took 69.81ms. Allocated memory is still 119.5MB. Free memory was 44.2MB in the beginning and 41.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 18]: 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 7 procedures, 115 locations, 4 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: 3.1s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 347 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 347 mSDsluCounter, 623 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 619 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 652 IncrementalHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 152 mSDtfsCounter, 652 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=495occurred in iteration=3, InterpolantAutomatonStates: 110, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 679 NumberOfCodeBlocks, 679 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 668 ConstructedInterpolants, 0 QuantifiedInterpolants, 2624 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-28 02:50:40,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE