./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe012_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe012_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 8ab6224550afdc7bd147a853b67470808fdf25e83f86b697677572dc7a8a62dd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:06:13,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:06:13,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:06:13,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:06:13,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:06:13,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:06:13,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:06:13,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:06:13,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:06:13,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:06:13,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:06:13,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:06:13,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:06:13,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:06:13,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:06:13,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:06:13,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:06:13,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:06:13,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:06:13,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:06:13,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:06:13,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:06:13,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:06:13,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:06:13,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:06:13,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:06:13,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:06:13,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:06:13,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:06:13,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:06:13,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:06:13,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:06:13,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:06:13,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:06:13,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:06:13,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:06:13,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:06:13,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:06:13,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:06:13,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:06:13,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:06:13,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:06:13,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:06:13,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:06:13,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:06:13,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:06:13,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:06:13,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:06:13,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:06:13,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:06:13,269 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:06:13,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:06:13,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:06:13,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:06:13,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:06:13,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:06:13,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:06:13,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:06:13,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:06:13,270 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:06:13,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:06:13,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:06:13,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:06:13,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:06:13,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:06:13,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:06:13,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:06:13,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:06:13,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:06:13,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:06:13,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:06:13,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:06:13,273 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:06:13,273 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:06:13,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:06:13,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:06:13,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ab6224550afdc7bd147a853b67470808fdf25e83f86b697677572dc7a8a62dd [2021-12-21 15:06:13,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:06:13,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:06:13,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:06:13,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:06:13,509 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:06:13,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe012_tso.i [2021-12-21 15:06:13,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59a8a0f33/a65d3489a80c4b54b56e305503c002ab/FLAG46bbddc8c [2021-12-21 15:06:13,917 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:06:13,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe012_tso.i [2021-12-21 15:06:13,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59a8a0f33/a65d3489a80c4b54b56e305503c002ab/FLAG46bbddc8c [2021-12-21 15:06:14,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59a8a0f33/a65d3489a80c4b54b56e305503c002ab [2021-12-21 15:06:14,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:06:14,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:06:14,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:06:14,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:06:14,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:06:14,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4241372d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14, skipping insertion in model container [2021-12-21 15:06:14,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:06:14,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:06:14,465 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/safe012_tso.i[945,958] [2021-12-21 15:06:14,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:06:14,583 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:06:14,594 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/safe012_tso.i[945,958] [2021-12-21 15:06:14,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:06:14,637 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:06:14,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14 WrapperNode [2021-12-21 15:06:14,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:06:14,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:06:14,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:06:14,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:06:14,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,672 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-12-21 15:06:14,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:06:14,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:06:14,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:06:14,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:06:14,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:06:14,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:06:14,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:06:14,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:06:14,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (1/1) ... [2021-12-21 15:06:14,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:06:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:06:14,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:06:14,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:06:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:06:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:06:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:06:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:06:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:06:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-21 15:06:14,774 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-21 15:06:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-21 15:06:14,774 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-21 15:06:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-21 15:06:14,775 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-21 15:06:14,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:06:14,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:06:14,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:06:14,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:06:14,777 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:06:14,850 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:06:14,851 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:06:15,001 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:06:15,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:06:15,020 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 15:06:15,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:06:15 BoogieIcfgContainer [2021-12-21 15:06:15,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:06:15,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:06:15,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:06:15,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:06:15,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:06:14" (1/3) ... [2021-12-21 15:06:15,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258f8ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:06:15, skipping insertion in model container [2021-12-21 15:06:15,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:06:14" (2/3) ... [2021-12-21 15:06:15,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258f8ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:06:15, skipping insertion in model container [2021-12-21 15:06:15,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:06:15" (3/3) ... [2021-12-21 15:06:15,040 INFO L111 eAbstractionObserver]: Analyzing ICFG safe012_tso.i [2021-12-21 15:06:15,044 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:06:15,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:06:15,044 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:06:15,044 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:06:15,118 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,119 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,120 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,120 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,120 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,121 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,121 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,121 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,121 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,123 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,124 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,125 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,125 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,125 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,125 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,125 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,126 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,126 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,127 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,127 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,127 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,129 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,129 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,129 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,130 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,130 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,130 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,130 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,131 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,131 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,131 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,131 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,132 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,132 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,133 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,133 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,135 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,141 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,141 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,141 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,144 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,145 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,145 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,145 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,146 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,146 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,147 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,149 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:06:15,150 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-21 15:06:15,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:06:15,205 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:06:15,205 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-21 15:06:15,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 101 places, 93 transitions, 201 flow [2021-12-21 15:06:15,266 INFO L129 PetriNetUnfolder]: 2/90 cut-off events. [2021-12-21 15:06:15,266 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-21 15:06:15,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 90 events. 2/90 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. 0/87 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2021-12-21 15:06:15,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 93 transitions, 201 flow [2021-12-21 15:06:15,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 76 transitions, 161 flow [2021-12-21 15:06:15,298 INFO L129 PetriNetUnfolder]: 1/75 cut-off events. [2021-12-21 15:06:15,298 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-21 15:06:15,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:15,299 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] [2021-12-21 15:06:15,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:15,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1681563862, now seen corresponding path program 1 times [2021-12-21 15:06:15,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:15,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992497040] [2021-12-21 15:06:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:15,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:15,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:15,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992497040] [2021-12-21 15:06:15,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992497040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:15,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:15,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:06:15,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705002493] [2021-12-21 15:06:15,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:15,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:06:15,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:06:15,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:06:15,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 93 [2021-12-21 15:06:15,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 161 flow. Second operand has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:15,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:15,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 93 [2021-12-21 15:06:15,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:15,950 INFO L129 PetriNetUnfolder]: 54/236 cut-off events. [2021-12-21 15:06:15,951 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-21 15:06:15,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 236 events. 54/236 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 875 event pairs, 22 based on Foata normal form. 8/236 useless extension candidates. Maximal degree in co-relation 336. Up to 67 conditions per place. [2021-12-21 15:06:15,953 INFO L132 encePairwiseOnDemand]: 83/93 looper letters, 14 selfloop transitions, 5 changer transitions 22/101 dead transitions. [2021-12-21 15:06:15,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 101 transitions, 299 flow [2021-12-21 15:06:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:06:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:06:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 711 transitions. [2021-12-21 15:06:15,979 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8494623655913979 [2021-12-21 15:06:15,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 711 transitions. [2021-12-21 15:06:15,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 711 transitions. [2021-12-21 15:06:15,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:15,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 711 transitions. [2021-12-21 15:06:15,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:15,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:15,993 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:15,995 INFO L186 Difference]: Start difference. First operand has 85 places, 76 transitions, 161 flow. Second operand 9 states and 711 transitions. [2021-12-21 15:06:15,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 101 transitions, 299 flow [2021-12-21 15:06:15,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 294 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-21 15:06:15,999 INFO L242 Difference]: Finished difference. Result has 97 places, 77 transitions, 205 flow [2021-12-21 15:06:16,000 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2021-12-21 15:06:16,003 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 12 predicate places. [2021-12-21 15:06:16,003 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 205 flow [2021-12-21 15:06:16,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,003 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:16,004 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] [2021-12-21 15:06:16,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:06:16,004 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1200547319, now seen corresponding path program 1 times [2021-12-21 15:06:16,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:16,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280866161] [2021-12-21 15:06:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:16,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:16,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:16,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280866161] [2021-12-21 15:06:16,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280866161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:16,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:16,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:06:16,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065331675] [2021-12-21 15:06:16,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:16,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:06:16,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:06:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:06:16,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 93 [2021-12-21 15:06:16,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:16,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 93 [2021-12-21 15:06:16,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:16,378 INFO L129 PetriNetUnfolder]: 97/378 cut-off events. [2021-12-21 15:06:16,379 INFO L130 PetriNetUnfolder]: For 326/354 co-relation queries the response was YES. [2021-12-21 15:06:16,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 378 events. 97/378 cut-off events. For 326/354 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1775 event pairs, 7 based on Foata normal form. 8/378 useless extension candidates. Maximal degree in co-relation 766. Up to 53 conditions per place. [2021-12-21 15:06:16,381 INFO L132 encePairwiseOnDemand]: 81/93 looper letters, 29 selfloop transitions, 11 changer transitions 38/136 dead transitions. [2021-12-21 15:06:16,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 621 flow [2021-12-21 15:06:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 15:06:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-21 15:06:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1305 transitions. [2021-12-21 15:06:16,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.825426944971537 [2021-12-21 15:06:16,384 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1305 transitions. [2021-12-21 15:06:16,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1305 transitions. [2021-12-21 15:06:16,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:16,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1305 transitions. [2021-12-21 15:06:16,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.76470588235294) internal successors, (1305), 17 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 93.0) internal successors, (1674), 18 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,391 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 93.0) internal successors, (1674), 18 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,391 INFO L186 Difference]: Start difference. First operand has 97 places, 77 transitions, 205 flow. Second operand 17 states and 1305 transitions. [2021-12-21 15:06:16,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 621 flow [2021-12-21 15:06:16,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 576 flow, removed 20 selfloop flow, removed 4 redundant places. [2021-12-21 15:06:16,396 INFO L242 Difference]: Finished difference. Result has 118 places, 82 transitions, 313 flow [2021-12-21 15:06:16,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=313, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2021-12-21 15:06:16,397 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 33 predicate places. [2021-12-21 15:06:16,397 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 313 flow [2021-12-21 15:06:16,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:16,397 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] [2021-12-21 15:06:16,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:06:16,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1976276855, now seen corresponding path program 1 times [2021-12-21 15:06:16,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:16,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009244084] [2021-12-21 15:06:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:16,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:16,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009244084] [2021-12-21 15:06:16,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009244084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:16,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:16,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:06:16,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595340190] [2021-12-21 15:06:16,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:16,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:06:16,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:06:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:06:16,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 93 [2021-12-21 15:06:16,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:16,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 93 [2021-12-21 15:06:16,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:16,622 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2021-12-21 15:06:16,622 INFO L130 PetriNetUnfolder]: For 903/961 co-relation queries the response was YES. [2021-12-21 15:06:16,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 192 events. 34/192 cut-off events. For 903/961 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 623 event pairs, 6 based on Foata normal form. 8/195 useless extension candidates. Maximal degree in co-relation 597. Up to 43 conditions per place. [2021-12-21 15:06:16,624 INFO L132 encePairwiseOnDemand]: 87/93 looper letters, 19 selfloop transitions, 4 changer transitions 22/106 dead transitions. [2021-12-21 15:06:16,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 106 transitions, 636 flow [2021-12-21 15:06:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:06:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:06:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 699 transitions. [2021-12-21 15:06:16,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8351254480286738 [2021-12-21 15:06:16,626 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 699 transitions. [2021-12-21 15:06:16,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 699 transitions. [2021-12-21 15:06:16,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:16,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 699 transitions. [2021-12-21 15:06:16,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.66666666666667) internal successors, (699), 9 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,629 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,629 INFO L186 Difference]: Start difference. First operand has 118 places, 82 transitions, 313 flow. Second operand 9 states and 699 transitions. [2021-12-21 15:06:16,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 106 transitions, 636 flow [2021-12-21 15:06:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 106 transitions, 544 flow, removed 42 selfloop flow, removed 10 redundant places. [2021-12-21 15:06:16,635 INFO L242 Difference]: Finished difference. Result has 111 places, 82 transitions, 304 flow [2021-12-21 15:06:16,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=304, PETRI_PLACES=111, PETRI_TRANSITIONS=82} [2021-12-21 15:06:16,635 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 26 predicate places. [2021-12-21 15:06:16,636 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 82 transitions, 304 flow [2021-12-21 15:06:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,636 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:16,636 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] [2021-12-21 15:06:16,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:06:16,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -772166055, now seen corresponding path program 1 times [2021-12-21 15:06:16,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:16,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033678021] [2021-12-21 15:06:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:16,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:16,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:16,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033678021] [2021-12-21 15:06:16,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033678021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:16,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:16,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:06:16,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782488955] [2021-12-21 15:06:16,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:16,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:06:16,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:06:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:06:16,781 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 93 [2021-12-21 15:06:16,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 82 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:16,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 93 [2021-12-21 15:06:16,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:16,900 INFO L129 PetriNetUnfolder]: 16/136 cut-off events. [2021-12-21 15:06:16,909 INFO L130 PetriNetUnfolder]: For 373/433 co-relation queries the response was YES. [2021-12-21 15:06:16,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 136 events. 16/136 cut-off events. For 373/433 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 299 event pairs, 4 based on Foata normal form. 2/132 useless extension candidates. Maximal degree in co-relation 356. Up to 25 conditions per place. [2021-12-21 15:06:16,910 INFO L132 encePairwiseOnDemand]: 85/93 looper letters, 16 selfloop transitions, 6 changer transitions 10/93 dead transitions. [2021-12-21 15:06:16,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 93 transitions, 482 flow [2021-12-21 15:06:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:06:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:06:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 769 transitions. [2021-12-21 15:06:16,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8268817204301075 [2021-12-21 15:06:16,912 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 769 transitions. [2021-12-21 15:06:16,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 769 transitions. [2021-12-21 15:06:16,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:16,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 769 transitions. [2021-12-21 15:06:16,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.9) internal successors, (769), 10 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 93.0) internal successors, (1023), 11 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,916 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 93.0) internal successors, (1023), 11 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,916 INFO L186 Difference]: Start difference. First operand has 111 places, 82 transitions, 304 flow. Second operand 10 states and 769 transitions. [2021-12-21 15:06:16,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 93 transitions, 482 flow [2021-12-21 15:06:16,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 93 transitions, 416 flow, removed 29 selfloop flow, removed 9 redundant places. [2021-12-21 15:06:16,932 INFO L242 Difference]: Finished difference. Result has 112 places, 82 transitions, 296 flow [2021-12-21 15:06:16,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=296, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2021-12-21 15:06:16,933 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 27 predicate places. [2021-12-21 15:06:16,933 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 296 flow [2021-12-21 15:06:16,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:16,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:16,934 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] [2021-12-21 15:06:16,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:06:16,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:16,935 INFO L85 PathProgramCache]: Analyzing trace with hash -820442422, now seen corresponding path program 1 times [2021-12-21 15:06:16,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:16,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196823871] [2021-12-21 15:06:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:16,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:17,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:17,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196823871] [2021-12-21 15:06:17,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196823871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:17,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:17,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:06:17,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132472216] [2021-12-21 15:06:17,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:17,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:06:17,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:06:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:06:17,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 93 [2021-12-21 15:06:17,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:17,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 93 [2021-12-21 15:06:17,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:17,365 INFO L129 PetriNetUnfolder]: 70/373 cut-off events. [2021-12-21 15:06:17,379 INFO L130 PetriNetUnfolder]: For 912/1051 co-relation queries the response was YES. [2021-12-21 15:06:17,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 373 events. 70/373 cut-off events. For 912/1051 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1824 event pairs, 7 based on Foata normal form. 9/370 useless extension candidates. Maximal degree in co-relation 920. Up to 70 conditions per place. [2021-12-21 15:06:17,382 INFO L132 encePairwiseOnDemand]: 81/93 looper letters, 29 selfloop transitions, 16 changer transitions 27/131 dead transitions. [2021-12-21 15:06:17,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 131 transitions, 818 flow [2021-12-21 15:06:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 15:06:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-21 15:06:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1289 transitions. [2021-12-21 15:06:17,385 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8153067678684377 [2021-12-21 15:06:17,385 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1289 transitions. [2021-12-21 15:06:17,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1289 transitions. [2021-12-21 15:06:17,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:17,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1289 transitions. [2021-12-21 15:06:17,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 75.82352941176471) internal successors, (1289), 17 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 93.0) internal successors, (1674), 18 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,398 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 93.0) internal successors, (1674), 18 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,399 INFO L186 Difference]: Start difference. First operand has 112 places, 82 transitions, 296 flow. Second operand 17 states and 1289 transitions. [2021-12-21 15:06:17,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 131 transitions, 818 flow [2021-12-21 15:06:17,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 131 transitions, 704 flow, removed 48 selfloop flow, removed 11 redundant places. [2021-12-21 15:06:17,403 INFO L242 Difference]: Finished difference. Result has 126 places, 92 transitions, 450 flow [2021-12-21 15:06:17,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=450, PETRI_PLACES=126, PETRI_TRANSITIONS=92} [2021-12-21 15:06:17,420 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 41 predicate places. [2021-12-21 15:06:17,420 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 92 transitions, 450 flow [2021-12-21 15:06:17,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,421 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:17,421 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] [2021-12-21 15:06:17,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:06:17,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1041133958, now seen corresponding path program 1 times [2021-12-21 15:06:17,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:17,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504225064] [2021-12-21 15:06:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:17,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:17,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504225064] [2021-12-21 15:06:17,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504225064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:17,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:17,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:06:17,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002208823] [2021-12-21 15:06:17,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:17,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:06:17,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:06:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:06:17,555 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 93 [2021-12-21 15:06:17,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 92 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:17,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 93 [2021-12-21 15:06:17,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:17,731 INFO L129 PetriNetUnfolder]: 48/251 cut-off events. [2021-12-21 15:06:17,731 INFO L130 PetriNetUnfolder]: For 1770/2529 co-relation queries the response was YES. [2021-12-21 15:06:17,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 251 events. 48/251 cut-off events. For 1770/2529 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1081 event pairs, 4 based on Foata normal form. 6/245 useless extension candidates. Maximal degree in co-relation 895. Up to 43 conditions per place. [2021-12-21 15:06:17,733 INFO L132 encePairwiseOnDemand]: 83/93 looper letters, 19 selfloop transitions, 9 changer transitions 29/116 dead transitions. [2021-12-21 15:06:17,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 116 transitions, 911 flow [2021-12-21 15:06:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:06:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:06:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 834 transitions. [2021-12-21 15:06:17,735 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8152492668621701 [2021-12-21 15:06:17,735 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 834 transitions. [2021-12-21 15:06:17,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 834 transitions. [2021-12-21 15:06:17,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:17,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 834 transitions. [2021-12-21 15:06:17,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 75.81818181818181) internal successors, (834), 11 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 93.0) internal successors, (1116), 12 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,739 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 93.0) internal successors, (1116), 12 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,746 INFO L186 Difference]: Start difference. First operand has 126 places, 92 transitions, 450 flow. Second operand 11 states and 834 transitions. [2021-12-21 15:06:17,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 116 transitions, 911 flow [2021-12-21 15:06:17,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 116 transitions, 735 flow, removed 88 selfloop flow, removed 12 redundant places. [2021-12-21 15:06:17,752 INFO L242 Difference]: Finished difference. Result has 120 places, 84 transitions, 357 flow [2021-12-21 15:06:17,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=357, PETRI_PLACES=120, PETRI_TRANSITIONS=84} [2021-12-21 15:06:17,753 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 35 predicate places. [2021-12-21 15:06:17,753 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 84 transitions, 357 flow [2021-12-21 15:06:17,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:17,754 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] [2021-12-21 15:06:17,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:06:17,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash -55246929, now seen corresponding path program 1 times [2021-12-21 15:06:17,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418016829] [2021-12-21 15:06:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:17,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:17,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:17,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418016829] [2021-12-21 15:06:17,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418016829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:17,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:17,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:06:17,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553575759] [2021-12-21 15:06:17,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:17,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:06:17,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:06:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:06:17,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 93 [2021-12-21 15:06:17,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 84 transitions, 357 flow. Second operand has 7 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:17,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 93 [2021-12-21 15:06:17,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:17,987 INFO L129 PetriNetUnfolder]: 25/172 cut-off events. [2021-12-21 15:06:17,987 INFO L130 PetriNetUnfolder]: For 796/1016 co-relation queries the response was YES. [2021-12-21 15:06:17,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 172 events. 25/172 cut-off events. For 796/1016 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 462 event pairs, 6 based on Foata normal form. 4/168 useless extension candidates. Maximal degree in co-relation 497. Up to 27 conditions per place. [2021-12-21 15:06:17,989 INFO L132 encePairwiseOnDemand]: 85/93 looper letters, 9 selfloop transitions, 4 changer transitions 21/95 dead transitions. [2021-12-21 15:06:17,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 95 transitions, 501 flow [2021-12-21 15:06:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:06:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:06:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 787 transitions. [2021-12-21 15:06:17,990 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462365591397849 [2021-12-21 15:06:17,991 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 787 transitions. [2021-12-21 15:06:17,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 787 transitions. [2021-12-21 15:06:17,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:17,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 787 transitions. [2021-12-21 15:06:17,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 78.7) internal successors, (787), 10 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 93.0) internal successors, (1023), 11 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,994 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 93.0) internal successors, (1023), 11 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,994 INFO L186 Difference]: Start difference. First operand has 120 places, 84 transitions, 357 flow. Second operand 10 states and 787 transitions. [2021-12-21 15:06:17,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 95 transitions, 501 flow [2021-12-21 15:06:17,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 95 transitions, 428 flow, removed 22 selfloop flow, removed 13 redundant places. [2021-12-21 15:06:17,997 INFO L242 Difference]: Finished difference. Result has 118 places, 74 transitions, 272 flow [2021-12-21 15:06:17,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=272, PETRI_PLACES=118, PETRI_TRANSITIONS=74} [2021-12-21 15:06:17,998 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 33 predicate places. [2021-12-21 15:06:17,998 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 74 transitions, 272 flow [2021-12-21 15:06:17,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.71428571428571) internal successors, (544), 7 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:17,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:17,999 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] [2021-12-21 15:06:17,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:06:17,999 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1882917079, now seen corresponding path program 1 times [2021-12-21 15:06:18,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680948938] [2021-12-21 15:06:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:18,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:18,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680948938] [2021-12-21 15:06:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680948938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:18,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:18,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:06:18,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156902046] [2021-12-21 15:06:18,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:18,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:06:18,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:06:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:06:18,085 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 93 [2021-12-21 15:06:18,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 74 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 77.66666666666667) internal successors, (466), 6 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:18,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 93 [2021-12-21 15:06:18,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:18,188 INFO L129 PetriNetUnfolder]: 113/367 cut-off events. [2021-12-21 15:06:18,188 INFO L130 PetriNetUnfolder]: For 765/792 co-relation queries the response was YES. [2021-12-21 15:06:18,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 367 events. 113/367 cut-off events. For 765/792 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1722 event pairs, 14 based on Foata normal form. 8/360 useless extension candidates. Maximal degree in co-relation 836. Up to 90 conditions per place. [2021-12-21 15:06:18,192 INFO L132 encePairwiseOnDemand]: 84/93 looper letters, 14 selfloop transitions, 6 changer transitions 19/100 dead transitions. [2021-12-21 15:06:18,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 100 transitions, 404 flow [2021-12-21 15:06:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:06:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:06:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 725 transitions. [2021-12-21 15:06:18,194 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8661887694145759 [2021-12-21 15:06:18,194 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 725 transitions. [2021-12-21 15:06:18,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 725 transitions. [2021-12-21 15:06:18,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:18,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 725 transitions. [2021-12-21 15:06:18,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.55555555555556) internal successors, (725), 9 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,197 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,197 INFO L186 Difference]: Start difference. First operand has 118 places, 74 transitions, 272 flow. Second operand 9 states and 725 transitions. [2021-12-21 15:06:18,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 100 transitions, 404 flow [2021-12-21 15:06:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 346 flow, removed 12 selfloop flow, removed 18 redundant places. [2021-12-21 15:06:18,202 INFO L242 Difference]: Finished difference. Result has 106 places, 77 transitions, 270 flow [2021-12-21 15:06:18,202 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=270, PETRI_PLACES=106, PETRI_TRANSITIONS=77} [2021-12-21 15:06:18,204 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 21 predicate places. [2021-12-21 15:06:18,205 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 77 transitions, 270 flow [2021-12-21 15:06:18,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.66666666666667) internal successors, (466), 6 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,205 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:18,205 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] [2021-12-21 15:06:18,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 15:06:18,206 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -496828178, now seen corresponding path program 1 times [2021-12-21 15:06:18,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:18,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315670953] [2021-12-21 15:06:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:18,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:18,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:18,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315670953] [2021-12-21 15:06:18,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315670953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:18,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:18,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:06:18,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60231022] [2021-12-21 15:06:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:18,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:06:18,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:06:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:06:18,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 93 [2021-12-21 15:06:18,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 77 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:18,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 93 [2021-12-21 15:06:18,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:18,383 INFO L129 PetriNetUnfolder]: 60/248 cut-off events. [2021-12-21 15:06:18,384 INFO L130 PetriNetUnfolder]: For 485/509 co-relation queries the response was YES. [2021-12-21 15:06:18,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 248 events. 60/248 cut-off events. For 485/509 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 892 event pairs, 4 based on Foata normal form. 9/253 useless extension candidates. Maximal degree in co-relation 701. Up to 79 conditions per place. [2021-12-21 15:06:18,385 INFO L132 encePairwiseOnDemand]: 84/93 looper letters, 14 selfloop transitions, 9 changer transitions 19/103 dead transitions. [2021-12-21 15:06:18,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 103 transitions, 535 flow [2021-12-21 15:06:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:06:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:06:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 804 transitions. [2021-12-21 15:06:18,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.864516129032258 [2021-12-21 15:06:18,389 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 804 transitions. [2021-12-21 15:06:18,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 804 transitions. [2021-12-21 15:06:18,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:18,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 804 transitions. [2021-12-21 15:06:18,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.4) internal successors, (804), 10 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 93.0) internal successors, (1023), 11 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,408 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 93.0) internal successors, (1023), 11 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,408 INFO L186 Difference]: Start difference. First operand has 106 places, 77 transitions, 270 flow. Second operand 10 states and 804 transitions. [2021-12-21 15:06:18,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 103 transitions, 535 flow [2021-12-21 15:06:18,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 103 transitions, 511 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-12-21 15:06:18,411 INFO L242 Difference]: Finished difference. Result has 112 places, 80 transitions, 338 flow [2021-12-21 15:06:18,411 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=338, PETRI_PLACES=112, PETRI_TRANSITIONS=80} [2021-12-21 15:06:18,412 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 27 predicate places. [2021-12-21 15:06:18,412 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 80 transitions, 338 flow [2021-12-21 15:06:18,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,412 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:18,412 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] [2021-12-21 15:06:18,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 15:06:18,413 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1039920585, now seen corresponding path program 1 times [2021-12-21 15:06:18,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652385628] [2021-12-21 15:06:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:18,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:18,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652385628] [2021-12-21 15:06:18,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652385628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:18,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:18,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 15:06:18,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870859067] [2021-12-21 15:06:18,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:18,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 15:06:18,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 15:06:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 15:06:18,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 93 [2021-12-21 15:06:18,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 80 transitions, 338 flow. Second operand has 8 states, 8 states have (on average 77.5) internal successors, (620), 8 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:18,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 93 [2021-12-21 15:06:18,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:18,615 INFO L129 PetriNetUnfolder]: 17/127 cut-off events. [2021-12-21 15:06:18,615 INFO L130 PetriNetUnfolder]: For 445/485 co-relation queries the response was YES. [2021-12-21 15:06:18,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 127 events. 17/127 cut-off events. For 445/485 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 237 event pairs, 0 based on Foata normal form. 14/140 useless extension candidates. Maximal degree in co-relation 371. Up to 31 conditions per place. [2021-12-21 15:06:18,616 INFO L132 encePairwiseOnDemand]: 84/93 looper letters, 8 selfloop transitions, 12 changer transitions 13/94 dead transitions. [2021-12-21 15:06:18,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 94 transitions, 534 flow [2021-12-21 15:06:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:06:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:06:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 871 transitions. [2021-12-21 15:06:18,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8514173998044966 [2021-12-21 15:06:18,634 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 871 transitions. [2021-12-21 15:06:18,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 871 transitions. [2021-12-21 15:06:18,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:18,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 871 transitions. [2021-12-21 15:06:18,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 79.18181818181819) internal successors, (871), 11 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 93.0) internal successors, (1116), 12 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,638 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 93.0) internal successors, (1116), 12 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,638 INFO L186 Difference]: Start difference. First operand has 112 places, 80 transitions, 338 flow. Second operand 11 states and 871 transitions. [2021-12-21 15:06:18,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 94 transitions, 534 flow [2021-12-21 15:06:18,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 94 transitions, 393 flow, removed 53 selfloop flow, removed 17 redundant places. [2021-12-21 15:06:18,644 INFO L242 Difference]: Finished difference. Result has 107 places, 80 transitions, 282 flow [2021-12-21 15:06:18,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=282, PETRI_PLACES=107, PETRI_TRANSITIONS=80} [2021-12-21 15:06:18,645 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 22 predicate places. [2021-12-21 15:06:18,645 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 80 transitions, 282 flow [2021-12-21 15:06:18,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 77.5) internal successors, (620), 8 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,646 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:06:18,646 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:06:18,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 15:06:18,646 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:06:18,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:06:18,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1272626232, now seen corresponding path program 1 times [2021-12-21 15:06:18,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:06:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038215381] [2021-12-21 15:06:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:06:18,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:06:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:06:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:06:18,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:06:18,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038215381] [2021-12-21 15:06:18,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038215381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:06:18,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:06:18,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:06:18,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680145154] [2021-12-21 15:06:18,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:06:18,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:06:18,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:06:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:06:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:06:18,740 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 93 [2021-12-21 15:06:18,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 80 transitions, 282 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:06:18,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 93 [2021-12-21 15:06:18,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:06:18,802 INFO L129 PetriNetUnfolder]: 6/95 cut-off events. [2021-12-21 15:06:18,802 INFO L130 PetriNetUnfolder]: For 83/89 co-relation queries the response was YES. [2021-12-21 15:06:18,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 95 events. 6/95 cut-off events. For 83/89 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 174. Up to 11 conditions per place. [2021-12-21 15:06:18,803 INFO L132 encePairwiseOnDemand]: 87/93 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2021-12-21 15:06:18,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 79 transitions, 308 flow [2021-12-21 15:06:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:06:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:06:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 546 transitions. [2021-12-21 15:06:18,804 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8387096774193549 [2021-12-21 15:06:18,804 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 546 transitions. [2021-12-21 15:06:18,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 546 transitions. [2021-12-21 15:06:18,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:06:18,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 546 transitions. [2021-12-21 15:06:18,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 93.0) internal successors, (744), 8 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 93.0) internal successors, (744), 8 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,807 INFO L186 Difference]: Start difference. First operand has 107 places, 80 transitions, 282 flow. Second operand 7 states and 546 transitions. [2021-12-21 15:06:18,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 79 transitions, 308 flow [2021-12-21 15:06:18,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 79 transitions, 226 flow, removed 22 selfloop flow, removed 15 redundant places. [2021-12-21 15:06:18,809 INFO L242 Difference]: Finished difference. Result has 92 places, 0 transitions, 0 flow [2021-12-21 15:06:18,809 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=92, PETRI_TRANSITIONS=0} [2021-12-21 15:06:18,810 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 7 predicate places. [2021-12-21 15:06:18,810 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 0 transitions, 0 flow [2021-12-21 15:06:18,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:06:18,812 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-21 15:06:18,813 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-21 15:06:18,814 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-21 15:06:18,814 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-21 15:06:18,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 15:06:18,817 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:06:18,818 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-21 15:06:18,818 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 15:06:18,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 03:06:18 BasicIcfg [2021-12-21 15:06:18,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 15:06:18,823 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 15:06:18,823 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 15:06:18,823 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 15:06:18,824 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:06:15" (3/4) ... [2021-12-21 15:06:18,826 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-21 15:06:18,830 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-21 15:06:18,830 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-21 15:06:18,830 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-21 15:06:18,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-21 15:06:18,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-21 15:06:18,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-21 15:06:18,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-21 15:06:18,864 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 15:06:18,864 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 15:06:18,865 INFO L158 Benchmark]: Toolchain (without parser) took 4579.47ms. Allocated memory was 86.0MB in the beginning and 161.5MB in the end (delta: 75.5MB). Free memory was 50.5MB in the beginning and 70.3MB in the end (delta: -19.8MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. [2021-12-21 15:06:18,865 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory is still 68.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 15:06:18,866 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.76ms. Allocated memory is still 86.0MB. Free memory was 50.3MB in the beginning and 52.3MB in the end (delta: -2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 15:06:18,866 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.42ms. Allocated memory is still 86.0MB. Free memory was 52.3MB in the beginning and 50.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 15:06:18,866 INFO L158 Benchmark]: Boogie Preprocessor took 22.33ms. Allocated memory is still 86.0MB. Free memory was 50.3MB in the beginning and 48.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 15:06:18,866 INFO L158 Benchmark]: RCFGBuilder took 325.82ms. Allocated memory is still 86.0MB. Free memory was 48.8MB in the beginning and 36.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 15:06:18,867 INFO L158 Benchmark]: TraceAbstraction took 3799.23ms. Allocated memory was 86.0MB in the beginning and 161.5MB in the end (delta: 75.5MB). Free memory was 36.2MB in the beginning and 73.4MB in the end (delta: -37.2MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2021-12-21 15:06:18,867 INFO L158 Benchmark]: Witness Printer took 41.60ms. Allocated memory is still 161.5MB. Free memory was 73.4MB in the beginning and 70.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 15:06:18,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory is still 68.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.76ms. Allocated memory is still 86.0MB. Free memory was 50.3MB in the beginning and 52.3MB in the end (delta: -2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.42ms. Allocated memory is still 86.0MB. Free memory was 52.3MB in the beginning and 50.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.33ms. Allocated memory is still 86.0MB. Free memory was 50.3MB in the beginning and 48.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 325.82ms. Allocated memory is still 86.0MB. Free memory was 48.8MB in the beginning and 36.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3799.23ms. Allocated memory was 86.0MB in the beginning and 161.5MB in the end (delta: 75.5MB). Free memory was 36.2MB in the beginning and 73.4MB in the end (delta: -37.2MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. * Witness Printer took 41.60ms. Allocated memory is still 161.5MB. Free memory was 73.4MB in the beginning and 70.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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, 116 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: 3.6s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 360 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 360 mSDsluCounter, 546 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 539 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 581 IncrementalHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 133 mSDtfsCounter, 581 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=450occurred in iteration=5, InterpolantAutomatonStates: 120, 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, 1.0s InterpolantComputationTime, 678 NumberOfCodeBlocks, 678 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 667 ConstructedInterpolants, 0 QuantifiedInterpolants, 2509 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! [2021-12-21 15:06:18,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE