./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe021_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/safe021_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 09edf41151ee2be1e615b82a5ff75107fc67a0fb206ce4e8ba7b647488d110c1 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:38:00,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:38:00,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:38:00,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:38:00,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:38:00,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:38:00,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:38:00,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:38:00,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:38:00,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:38:00,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:38:00,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:38:00,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:38:00,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:38:00,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:38:00,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:38:00,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:38:00,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:38:00,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:38:00,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:38:00,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:38:00,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:38:00,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:38:00,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:38:00,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:38:00,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:38:00,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:38:00,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:38:00,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:38:00,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:38:00,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:38:00,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:38:00,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:38:00,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:38:00,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:38:00,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:38:00,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:38:00,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:38:00,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:38:00,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:38:00,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:38:00,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:38:00,360 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:38:00,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:38:00,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:38:00,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:38:00,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:38:00,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:38:00,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:38:00,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:38:00,362 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:38:00,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:38:00,362 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:38:00,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:38:00,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:38:00,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:38:00,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:38:00,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:38:00,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:38:00,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:38:00,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:38:00,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:38:00,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:38:00,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:38:00,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:38:00,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:38:00,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:38:00,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:38:00,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:38:00,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:38:00,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:38:00,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:38:00,366 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:38:00,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:38:00,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:38:00,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:38:00,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09edf41151ee2be1e615b82a5ff75107fc67a0fb206ce4e8ba7b647488d110c1 [2021-12-14 16:38:00,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:38:00,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:38:00,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:38:00,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:38:00,563 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:38:00,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe021_tso.i [2021-12-14 16:38:00,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1131021a8/284b832c6ca94d6e9a331b061cd16e0c/FLAG819406056 [2021-12-14 16:38:01,077 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:38:01,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe021_tso.i [2021-12-14 16:38:01,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1131021a8/284b832c6ca94d6e9a331b061cd16e0c/FLAG819406056 [2021-12-14 16:38:01,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1131021a8/284b832c6ca94d6e9a331b061cd16e0c [2021-12-14 16:38:01,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:38:01,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:38:01,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:38:01,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:38:01,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:38:01,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de6c226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01, skipping insertion in model container [2021-12-14 16:38:01,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:38:01,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:38:01,288 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/safe021_tso.i[945,958] [2021-12-14 16:38:01,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:38:01,408 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:38:01,417 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/safe021_tso.i[945,958] [2021-12-14 16:38:01,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:38:01,470 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:38:01,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01 WrapperNode [2021-12-14 16:38:01,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:38:01,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:38:01,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:38:01,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:38:01,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,508 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-14 16:38:01,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:38:01,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:38:01,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:38:01,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:38:01,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:38:01,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:38:01,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:38:01,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:38:01,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (1/1) ... [2021-12-14 16:38:01,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:38:01,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:38:01,549 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) [2021-12-14 16:38:01,550 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 [2021-12-14 16:38:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:38:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 16:38:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:38:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:38:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:38:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-14 16:38:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-14 16:38:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-14 16:38:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-14 16:38:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-14 16:38:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-14 16:38:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:38:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 16:38:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:38:01,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:38:01,580 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:38:01,675 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:38:01,676 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:38:01,821 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:38:01,826 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:38:01,827 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 16:38:01,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:38:01 BoogieIcfgContainer [2021-12-14 16:38:01,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:38:01,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:38:01,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:38:01,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:38:01,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:38:01" (1/3) ... [2021-12-14 16:38:01,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf9c71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:38:01, skipping insertion in model container [2021-12-14 16:38:01,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:38:01" (2/3) ... [2021-12-14 16:38:01,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf9c71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:38:01, skipping insertion in model container [2021-12-14 16:38:01,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:38:01" (3/3) ... [2021-12-14 16:38:01,835 INFO L111 eAbstractionObserver]: Analyzing ICFG safe021_tso.i [2021-12-14 16:38:01,839 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:38:01,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:38:01,840 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:38:01,840 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:38:01,860 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,861 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,861 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,861 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,861 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,861 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,862 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,862 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,862 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,862 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,862 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,863 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,863 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,863 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,863 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,863 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,864 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,864 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,864 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,864 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,864 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,865 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,865 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,865 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,865 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,866 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,866 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,866 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,866 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,866 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,866 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,867 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,867 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,867 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,869 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,869 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,878 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,880 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,881 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,881 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,884 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,885 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,886 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,886 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,887 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,888 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,888 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,888 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:38:01,888 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-14 16:38:01,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:38:01,936 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 [2021-12-14 16:38:01,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-14 16:38:01,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 199 flow [2021-12-14 16:38:01,991 INFO L129 PetriNetUnfolder]: 2/89 cut-off events. [2021-12-14 16:38:01,991 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:38:01,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2021-12-14 16:38:01,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 199 flow [2021-12-14 16:38:01,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 159 flow [2021-12-14 16:38:02,020 INFO L129 PetriNetUnfolder]: 1/74 cut-off events. [2021-12-14 16:38:02,020 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:38:02,020 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:38:02,021 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:38:02,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:38:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:38:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1402349347, now seen corresponding path program 1 times [2021-12-14 16:38:02,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:38:02,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447844660] [2021-12-14 16:38:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:38:02,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:38:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:38:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:38:02,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:38:02,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447844660] [2021-12-14 16:38:02,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447844660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:38:02,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:38:02,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:38:02,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354095738] [2021-12-14 16:38:02,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:38:02,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:38:02,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:38:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:38:02,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:38:02,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 92 [2021-12-14 16:38:02,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:02,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:38:02,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 92 [2021-12-14 16:38:02,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:38:02,883 INFO L129 PetriNetUnfolder]: 178/538 cut-off events. [2021-12-14 16:38:02,883 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-14 16:38:02,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 538 events. 178/538 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2934 event pairs, 26 based on Foata normal form. 19/535 useless extension candidates. Maximal degree in co-relation 848. Up to 117 conditions per place. [2021-12-14 16:38:02,897 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 19 selfloop transitions, 5 changer transitions 35/117 dead transitions. [2021-12-14 16:38:02,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 361 flow [2021-12-14 16:38:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 16:38:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-14 16:38:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1001 transitions. [2021-12-14 16:38:02,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8369565217391305 [2021-12-14 16:38:02,924 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1001 transitions. [2021-12-14 16:38:02,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1001 transitions. [2021-12-14 16:38:02,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:38:02,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1001 transitions. [2021-12-14 16:38:02,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:02,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:02,942 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:02,943 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 159 flow. Second operand 13 states and 1001 transitions. [2021-12-14 16:38:02,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 361 flow [2021-12-14 16:38:02,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 117 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-14 16:38:02,950 INFO L242 Difference]: Finished difference. Result has 105 places, 77 transitions, 226 flow [2021-12-14 16:38:02,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=226, PETRI_PLACES=105, PETRI_TRANSITIONS=77} [2021-12-14 16:38:02,956 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2021-12-14 16:38:02,956 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 77 transitions, 226 flow [2021-12-14 16:38:02,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:02,957 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:38:02,958 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] [2021-12-14 16:38:02,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:38:02,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:38:02,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:38:02,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1317688226, now seen corresponding path program 1 times [2021-12-14 16:38:02,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:38:02,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686491905] [2021-12-14 16:38:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:38:02,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:38:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:38:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:38:03,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:38:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686491905] [2021-12-14 16:38:03,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686491905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:38:03,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:38:03,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:38:03,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695572462] [2021-12-14 16:38:03,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:38:03,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:38:03,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:38:03,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:38:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:38:03,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 92 [2021-12-14 16:38:03,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 77 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:38:03,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 92 [2021-12-14 16:38:03,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:38:03,293 INFO L129 PetriNetUnfolder]: 99/416 cut-off events. [2021-12-14 16:38:03,293 INFO L130 PetriNetUnfolder]: For 834/875 co-relation queries the response was YES. [2021-12-14 16:38:03,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 416 events. 99/416 cut-off events. For 834/875 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2175 event pairs, 15 based on Foata normal form. 13/417 useless extension candidates. Maximal degree in co-relation 1149. Up to 95 conditions per place. [2021-12-14 16:38:03,298 INFO L132 encePairwiseOnDemand]: 81/92 looper letters, 21 selfloop transitions, 12 changer transitions 34/125 dead transitions. [2021-12-14 16:38:03,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 125 transitions, 708 flow [2021-12-14 16:38:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 16:38:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-14 16:38:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1003 transitions. [2021-12-14 16:38:03,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8386287625418061 [2021-12-14 16:38:03,302 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1003 transitions. [2021-12-14 16:38:03,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1003 transitions. [2021-12-14 16:38:03,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:38:03,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1003 transitions. [2021-12-14 16:38:03,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 77.15384615384616) internal successors, (1003), 13 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,309 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,309 INFO L186 Difference]: Start difference. First operand has 105 places, 77 transitions, 226 flow. Second operand 13 states and 1003 transitions. [2021-12-14 16:38:03,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 125 transitions, 708 flow [2021-12-14 16:38:03,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 125 transitions, 656 flow, removed 24 selfloop flow, removed 4 redundant places. [2021-12-14 16:38:03,317 INFO L242 Difference]: Finished difference. Result has 115 places, 82 transitions, 315 flow [2021-12-14 16:38:03,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=315, PETRI_PLACES=115, PETRI_TRANSITIONS=82} [2021-12-14 16:38:03,318 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 31 predicate places. [2021-12-14 16:38:03,318 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 82 transitions, 315 flow [2021-12-14 16:38:03,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.85714285714286) internal successors, (517), 7 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:38:03,319 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] [2021-12-14 16:38:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:38:03,320 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:38:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:38:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1980734781, now seen corresponding path program 1 times [2021-12-14 16:38:03,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:38:03,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386940646] [2021-12-14 16:38:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:38:03,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:38:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:38:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:38:03,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:38:03,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386940646] [2021-12-14 16:38:03,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386940646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:38:03,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:38:03,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:38:03,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647090381] [2021-12-14 16:38:03,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:38:03,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:38:03,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:38:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:38:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:38:03,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-14 16:38:03,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 82 transitions, 315 flow. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:38:03,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-14 16:38:03,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:38:03,609 INFO L129 PetriNetUnfolder]: 56/358 cut-off events. [2021-12-14 16:38:03,610 INFO L130 PetriNetUnfolder]: For 769/878 co-relation queries the response was YES. [2021-12-14 16:38:03,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 358 events. 56/358 cut-off events. For 769/878 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1930 event pairs, 24 based on Foata normal form. 12/342 useless extension candidates. Maximal degree in co-relation 881. Up to 63 conditions per place. [2021-12-14 16:38:03,614 INFO L132 encePairwiseOnDemand]: 84/92 looper letters, 10 selfloop transitions, 5 changer transitions 16/96 dead transitions. [2021-12-14 16:38:03,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 456 flow [2021-12-14 16:38:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:38:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:38:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 778 transitions. [2021-12-14 16:38:03,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8456521739130435 [2021-12-14 16:38:03,617 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 778 transitions. [2021-12-14 16:38:03,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 778 transitions. [2021-12-14 16:38:03,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:38:03,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 778 transitions. [2021-12-14 16:38:03,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.8) internal successors, (778), 10 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,621 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,621 INFO L186 Difference]: Start difference. First operand has 115 places, 82 transitions, 315 flow. Second operand 10 states and 778 transitions. [2021-12-14 16:38:03,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 456 flow [2021-12-14 16:38:03,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 402 flow, removed 27 selfloop flow, removed 12 redundant places. [2021-12-14 16:38:03,628 INFO L242 Difference]: Finished difference. Result has 111 places, 79 transitions, 287 flow [2021-12-14 16:38:03,628 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=287, PETRI_PLACES=111, PETRI_TRANSITIONS=79} [2021-12-14 16:38:03,629 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2021-12-14 16:38:03,629 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 79 transitions, 287 flow [2021-12-14 16:38:03,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:38:03,630 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] [2021-12-14 16:38:03,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:38:03,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:38:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:38:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1129215263, now seen corresponding path program 1 times [2021-12-14 16:38:03,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:38:03,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16922353] [2021-12-14 16:38:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:38:03,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:38:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:38:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:38:03,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:38:03,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16922353] [2021-12-14 16:38:03,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16922353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:38:03,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:38:03,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:38:03,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252615723] [2021-12-14 16:38:03,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:38:03,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:38:03,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:38:03,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:38:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:38:03,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-14 16:38:03,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 79 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:38:03,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-14 16:38:03,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:38:03,921 INFO L129 PetriNetUnfolder]: 318/854 cut-off events. [2021-12-14 16:38:03,921 INFO L130 PetriNetUnfolder]: For 446/461 co-relation queries the response was YES. [2021-12-14 16:38:03,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 854 events. 318/854 cut-off events. For 446/461 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5873 event pairs, 20 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 1721. Up to 223 conditions per place. [2021-12-14 16:38:03,929 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 26 selfloop transitions, 15 changer transitions 5/111 dead transitions. [2021-12-14 16:38:03,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 111 transitions, 447 flow [2021-12-14 16:38:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:38:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:38:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2021-12-14 16:38:03,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8673913043478261 [2021-12-14 16:38:03,931 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2021-12-14 16:38:03,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2021-12-14 16:38:03,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:38:03,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2021-12-14 16:38:03,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.8) internal successors, (798), 10 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,937 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,937 INFO L186 Difference]: Start difference. First operand has 111 places, 79 transitions, 287 flow. Second operand 10 states and 798 transitions. [2021-12-14 16:38:03,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 111 transitions, 447 flow [2021-12-14 16:38:03,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 111 transitions, 396 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-12-14 16:38:03,945 INFO L242 Difference]: Finished difference. Result has 109 places, 92 transitions, 345 flow [2021-12-14 16:38:03,945 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=109, PETRI_TRANSITIONS=92} [2021-12-14 16:38:03,946 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 25 predicate places. [2021-12-14 16:38:03,947 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 92 transitions, 345 flow [2021-12-14 16:38:03,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:03,949 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:38:03,949 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] [2021-12-14 16:38:03,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:38:03,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:38:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:38:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1097371036, now seen corresponding path program 1 times [2021-12-14 16:38:03,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:38:03,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171146023] [2021-12-14 16:38:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:38:03,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:38:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:38:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:38:04,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:38:04,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171146023] [2021-12-14 16:38:04,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171146023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:38:04,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:38:04,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:38:04,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723962375] [2021-12-14 16:38:04,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:38:04,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:38:04,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:38:04,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:38:04,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:38:04,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-14 16:38:04,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 92 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:38:04,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-14 16:38:04,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:38:04,291 INFO L129 PetriNetUnfolder]: 290/796 cut-off events. [2021-12-14 16:38:04,292 INFO L130 PetriNetUnfolder]: For 1868/2208 co-relation queries the response was YES. [2021-12-14 16:38:04,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 796 events. 290/796 cut-off events. For 1868/2208 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5516 event pairs, 4 based on Foata normal form. 61/806 useless extension candidates. Maximal degree in co-relation 2625. Up to 309 conditions per place. [2021-12-14 16:38:04,299 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 26 selfloop transitions, 28 changer transitions 11/130 dead transitions. [2021-12-14 16:38:04,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 130 transitions, 711 flow [2021-12-14 16:38:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 16:38:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-14 16:38:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1036 transitions. [2021-12-14 16:38:04,303 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8662207357859532 [2021-12-14 16:38:04,303 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1036 transitions. [2021-12-14 16:38:04,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1036 transitions. [2021-12-14 16:38:04,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:38:04,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1036 transitions. [2021-12-14 16:38:04,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.6923076923077) internal successors, (1036), 13 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,309 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 92.0) internal successors, (1288), 14 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,310 INFO L186 Difference]: Start difference. First operand has 109 places, 92 transitions, 345 flow. Second operand 13 states and 1036 transitions. [2021-12-14 16:38:04,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 130 transitions, 711 flow [2021-12-14 16:38:04,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 130 transitions, 709 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:38:04,316 INFO L242 Difference]: Finished difference. Result has 126 places, 109 transitions, 569 flow [2021-12-14 16:38:04,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=569, PETRI_PLACES=126, PETRI_TRANSITIONS=109} [2021-12-14 16:38:04,317 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 42 predicate places. [2021-12-14 16:38:04,317 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 109 transitions, 569 flow [2021-12-14 16:38:04,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:38:04,318 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] [2021-12-14 16:38:04,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:38:04,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:38:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:38:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash 746187199, now seen corresponding path program 1 times [2021-12-14 16:38:04,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:38:04,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419259364] [2021-12-14 16:38:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:38:04,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:38:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:38:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:38:04,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:38:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419259364] [2021-12-14 16:38:04,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419259364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:38:04,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:38:04,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:38:04,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128667635] [2021-12-14 16:38:04,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:38:04,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:38:04,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:38:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:38:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:38:04,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-14 16:38:04,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 109 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:38:04,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-14 16:38:04,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:38:04,617 INFO L129 PetriNetUnfolder]: 210/696 cut-off events. [2021-12-14 16:38:04,617 INFO L130 PetriNetUnfolder]: For 3308/3544 co-relation queries the response was YES. [2021-12-14 16:38:04,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 696 events. 210/696 cut-off events. For 3308/3544 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5049 event pairs, 0 based on Foata normal form. 69/724 useless extension candidates. Maximal degree in co-relation 2892. Up to 231 conditions per place. [2021-12-14 16:38:04,622 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 22 selfloop transitions, 32 changer transitions 19/138 dead transitions. [2021-12-14 16:38:04,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 138 transitions, 909 flow [2021-12-14 16:38:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:38:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-14 16:38:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1258 transitions. [2021-12-14 16:38:04,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8546195652173914 [2021-12-14 16:38:04,625 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1258 transitions. [2021-12-14 16:38:04,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1258 transitions. [2021-12-14 16:38:04,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:38:04,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1258 transitions. [2021-12-14 16:38:04,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 78.625) internal successors, (1258), 16 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 92.0) internal successors, (1564), 17 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,630 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 92.0) internal successors, (1564), 17 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,630 INFO L186 Difference]: Start difference. First operand has 126 places, 109 transitions, 569 flow. Second operand 16 states and 1258 transitions. [2021-12-14 16:38:04,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 138 transitions, 909 flow [2021-12-14 16:38:04,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 138 transitions, 824 flow, removed 34 selfloop flow, removed 8 redundant places. [2021-12-14 16:38:04,643 INFO L242 Difference]: Finished difference. Result has 140 places, 110 transitions, 598 flow [2021-12-14 16:38:04,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=598, PETRI_PLACES=140, PETRI_TRANSITIONS=110} [2021-12-14 16:38:04,644 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 56 predicate places. [2021-12-14 16:38:04,644 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 110 transitions, 598 flow [2021-12-14 16:38:04,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:38:04,645 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:38:04,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:38:04,645 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-14 16:38:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:38:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1117817023, now seen corresponding path program 1 times [2021-12-14 16:38:04,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:38:04,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289628464] [2021-12-14 16:38:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:38:04,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:38:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:38:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:38:04,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:38:04,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289628464] [2021-12-14 16:38:04,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289628464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:38:04,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:38:04,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:38:04,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434041250] [2021-12-14 16:38:04,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:38:04,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:38:04,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:38:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:38:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:38:04,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-14 16:38:04,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 110 transitions, 598 flow. Second operand has 7 states, 7 states have (on average 72.57142857142857) internal successors, (508), 7 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:38:04,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-14 16:38:04,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:38:04,859 INFO L129 PetriNetUnfolder]: 122/655 cut-off events. [2021-12-14 16:38:04,859 INFO L130 PetriNetUnfolder]: For 1743/1775 co-relation queries the response was YES. [2021-12-14 16:38:04,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2107 conditions, 655 events. 122/655 cut-off events. For 1743/1775 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4967 event pairs, 0 based on Foata normal form. 3/627 useless extension candidates. Maximal degree in co-relation 2056. Up to 87 conditions per place. [2021-12-14 16:38:04,863 INFO L132 encePairwiseOnDemand]: 80/92 looper letters, 0 selfloop transitions, 0 changer transitions 117/117 dead transitions. [2021-12-14 16:38:04,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 117 transitions, 698 flow [2021-12-14 16:38:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:38:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:38:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 589 transitions. [2021-12-14 16:38:04,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8002717391304348 [2021-12-14 16:38:04,865 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 589 transitions. [2021-12-14 16:38:04,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 589 transitions. [2021-12-14 16:38:04,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:38:04,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 589 transitions. [2021-12-14 16:38:04,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.625) internal successors, (589), 8 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,868 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,868 INFO L186 Difference]: Start difference. First operand has 140 places, 110 transitions, 598 flow. Second operand 8 states and 589 transitions. [2021-12-14 16:38:04,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 117 transitions, 698 flow [2021-12-14 16:38:04,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 601 flow, removed 15 selfloop flow, removed 15 redundant places. [2021-12-14 16:38:04,879 INFO L242 Difference]: Finished difference. Result has 127 places, 0 transitions, 0 flow [2021-12-14 16:38:04,879 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=127, PETRI_TRANSITIONS=0} [2021-12-14 16:38:04,880 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 43 predicate places. [2021-12-14 16:38:04,880 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 0 transitions, 0 flow [2021-12-14 16:38:04,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.57142857142857) internal successors, (508), 7 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:38:04,882 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-14 16:38:04,882 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-14 16:38:04,883 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-14 16:38:04,883 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-14 16:38:04,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:38:04,886 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:38:04,887 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-14 16:38:04,887 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 16:38:04,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 04:38:04 BasicIcfg [2021-12-14 16:38:04,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 16:38:04,890 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 16:38:04,890 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 16:38:04,890 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 16:38:04,891 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:38:01" (3/4) ... [2021-12-14 16:38:04,893 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-14 16:38:04,897 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-14 16:38:04,897 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-14 16:38:04,897 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-14 16:38:04,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-14 16:38:04,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-14 16:38:04,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-14 16:38:04,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-14 16:38:04,920 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 16:38:04,921 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 16:38:04,921 INFO L158 Benchmark]: Toolchain (without parser) took 3809.01ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 64.5MB in the beginning and 103.4MB in the end (delta: -39.0MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-12-14 16:38:04,921 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 102.8MB. Free memory is still 82.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:38:04,921 INFO L158 Benchmark]: CACSL2BoogieTranslator took 356.79ms. Allocated memory is still 102.8MB. Free memory was 64.3MB in the beginning and 68.8MB in the end (delta: -4.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 16:38:04,922 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.37ms. Allocated memory is still 102.8MB. Free memory was 68.8MB in the beginning and 66.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 16:38:04,922 INFO L158 Benchmark]: Boogie Preprocessor took 15.47ms. Allocated memory is still 102.8MB. Free memory was 66.7MB in the beginning and 65.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:38:04,922 INFO L158 Benchmark]: RCFGBuilder took 303.91ms. Allocated memory is still 102.8MB. Free memory was 65.5MB in the beginning and 53.2MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 16:38:04,922 INFO L158 Benchmark]: TraceAbstraction took 3059.97ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 52.6MB in the beginning and 106.6MB in the end (delta: -54.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:38:04,923 INFO L158 Benchmark]: Witness Printer took 30.51ms. Allocated memory is still 148.9MB. Free memory was 106.6MB in the beginning and 103.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 16:38:04,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 102.8MB. Free memory is still 82.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 356.79ms. Allocated memory is still 102.8MB. Free memory was 64.3MB in the beginning and 68.8MB in the end (delta: -4.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.37ms. Allocated memory is still 102.8MB. Free memory was 68.8MB in the beginning and 66.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.47ms. Allocated memory is still 102.8MB. Free memory was 66.7MB in the beginning and 65.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 303.91ms. Allocated memory is still 102.8MB. Free memory was 65.5MB in the beginning and 53.2MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3059.97ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 52.6MB in the beginning and 106.6MB in the end (delta: -54.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 30.51ms. Allocated memory is still 148.9MB. Free memory was 106.6MB in the beginning and 103.4MB 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, 115 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.0s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 284 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 284 mSDsluCounter, 349 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 357 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 442 IncrementalHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 82 mSDtfsCounter, 442 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=598occurred in iteration=6, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 422 NumberOfCodeBlocks, 422 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 415 ConstructedInterpolants, 0 QuantifiedInterpolants, 1765 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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! [2021-12-14 16:38:04,961 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