./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe023_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/safe023_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 b87483e693fd72a28f6c7edd484e610e6e0dbb17679c8092f6f9c9cd35d4acca --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:32:22,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:32:22,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:32:22,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:32:22,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:32:22,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:32:22,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:32:22,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:32:22,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:32:22,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:32:22,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:32:22,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:32:22,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:32:22,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:32:22,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:32:22,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:32:22,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:32:22,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:32:22,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:32:22,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:32:22,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:32:22,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:32:22,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:32:22,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:32:22,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:32:22,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:32:22,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:32:22,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:32:22,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:32:22,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:32:22,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:32:22,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:32:22,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:32:22,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:32:22,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:32:22,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:32:22,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:32:22,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:32:22,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:32:22,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:32:22,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:32:22,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:32:22,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:32:22,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:32:22,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:32:22,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:32:22,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:32:22,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:32:22,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:32:22,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:32:22,909 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:32:22,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:32:22,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:32:22,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:32:22,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:32:22,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:32:22,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:32:22,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:32:22,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:32:22,911 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:32:22,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:32:22,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:32:22,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:32:22,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:32:22,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:32:22,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:32:22,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:32:22,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:32:22,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:32:22,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:32:22,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:32:22,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:32:22,914 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:32:22,914 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:32:22,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:32:22,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:32:22,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b87483e693fd72a28f6c7edd484e610e6e0dbb17679c8092f6f9c9cd35d4acca [2021-12-22 13:32:23,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:32:23,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:32:23,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:32:23,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:32:23,129 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:32:23,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe023_tso.i [2021-12-22 13:32:23,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bcc84726/8c69a2543a024a00829556e998d2c888/FLAGded4d2bce [2021-12-22 13:32:23,637 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:32:23,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe023_tso.i [2021-12-22 13:32:23,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bcc84726/8c69a2543a024a00829556e998d2c888/FLAGded4d2bce [2021-12-22 13:32:23,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bcc84726/8c69a2543a024a00829556e998d2c888 [2021-12-22 13:32:23,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:32:23,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:32:23,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:32:23,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:32:24,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:32:24,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:32:23" (1/1) ... [2021-12-22 13:32:24,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779b3c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24, skipping insertion in model container [2021-12-22 13:32:24,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:32:23" (1/1) ... [2021-12-22 13:32:24,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:32:24,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:32:24,193 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/safe023_tso.i[945,958] [2021-12-22 13:32:24,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:32:24,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:32:24,348 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/safe023_tso.i[945,958] [2021-12-22 13:32:24,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:32:24,414 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:32:24,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24 WrapperNode [2021-12-22 13:32:24,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:32:24,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:32:24,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:32:24,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:32:24,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,463 INFO L137 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-22 13:32:24,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:32:24,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:32:24,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:32:24,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:32:24,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:32:24,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:32:24,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:32:24,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:32:24,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (1/1) ... [2021-12-22 13:32:24,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:32:24,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:32:24,548 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) [2021-12-22 13:32:24,563 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 [2021-12-22 13:32:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:32:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:32:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:32:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:32:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:32:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-22 13:32:24,594 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-22 13:32:24,594 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-22 13:32:24,594 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-22 13:32:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-22 13:32:24,595 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-22 13:32:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:32:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:32:24,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:32:24,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:32:24,596 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:32:24,721 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:32:24,722 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:32:24,838 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:32:24,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:32:24,844 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:32:24,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:32:24 BoogieIcfgContainer [2021-12-22 13:32:24,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:32:24,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:32:24,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:32:24,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:32:24,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:32:23" (1/3) ... [2021-12-22 13:32:24,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c7b34e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:32:24, skipping insertion in model container [2021-12-22 13:32:24,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:32:24" (2/3) ... [2021-12-22 13:32:24,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c7b34e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:32:24, skipping insertion in model container [2021-12-22 13:32:24,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:32:24" (3/3) ... [2021-12-22 13:32:24,855 INFO L111 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2021-12-22 13:32:24,862 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:32:24,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:32:24,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:32:24,862 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:32:24,888 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,888 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,888 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,888 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,889 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,890 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,891 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,892 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,895 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,895 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,895 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,895 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,898 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,899 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,900 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,900 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,901 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,901 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,902 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,902 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:32:24,902 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-22 13:32:24,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:32:24,937 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 [2021-12-22 13:32:24,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 13:32:24,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 92 transitions, 199 flow [2021-12-22 13:32:24,988 INFO L129 PetriNetUnfolder]: 2/89 cut-off events. [2021-12-22 13:32:24,988 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:32:24,991 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. [2021-12-22 13:32:24,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 92 transitions, 199 flow [2021-12-22 13:32:24,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 159 flow [2021-12-22 13:32:25,007 INFO L129 PetriNetUnfolder]: 1/74 cut-off events. [2021-12-22 13:32:25,007 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:32:25,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:32:25,008 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] [2021-12-22 13:32:25,008 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:32:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:32:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1011825075, now seen corresponding path program 1 times [2021-12-22 13:32:25,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:32:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118792690] [2021-12-22 13:32:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:32:25,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:32:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:32:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:32:25,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:32:25,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118792690] [2021-12-22 13:32:25,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118792690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:32:25,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:32:25,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:32:25,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52516795] [2021-12-22 13:32:25,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:32:25,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:32:25,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:32:25,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:32:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:32:25,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 92 [2021-12-22 13:32:25,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:32:25,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 92 [2021-12-22 13:32:25,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:32:25,676 INFO L129 PetriNetUnfolder]: 192/552 cut-off events. [2021-12-22 13:32:25,676 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-12-22 13:32:25,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 552 events. 192/552 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2675 event pairs, 24 based on Foata normal form. 27/555 useless extension candidates. Maximal degree in co-relation 888. Up to 64 conditions per place. [2021-12-22 13:32:25,681 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 26 selfloop transitions, 5 changer transitions 44/131 dead transitions. [2021-12-22 13:32:25,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 430 flow [2021-12-22 13:32:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:32:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:32:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 991 transitions. [2021-12-22 13:32:25,693 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285953177257525 [2021-12-22 13:32:25,693 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 991 transitions. [2021-12-22 13:32:25,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 991 transitions. [2021-12-22 13:32:25,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:32:25,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 991 transitions. [2021-12-22 13:32:25,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.23076923076923) internal successors, (991), 13 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,706 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) [2021-12-22 13:32:25,707 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) [2021-12-22 13:32:25,708 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 159 flow. Second operand 13 states and 991 transitions. [2021-12-22 13:32:25,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 430 flow [2021-12-22 13:32:25,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 424 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:32:25,713 INFO L242 Difference]: Finished difference. Result has 105 places, 77 transitions, 226 flow [2021-12-22 13:32:25,714 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} [2021-12-22 13:32:25,716 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2021-12-22 13:32:25,716 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 77 transitions, 226 flow [2021-12-22 13:32:25,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,717 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:32:25,717 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] [2021-12-22 13:32:25,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:32:25,717 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:32:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:32:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1090711155, now seen corresponding path program 1 times [2021-12-22 13:32:25,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:32:25,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166711855] [2021-12-22 13:32:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:32:25,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:32:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:32:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:32:25,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:32:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166711855] [2021-12-22 13:32:25,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166711855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:32:25,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:32:25,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:32:25,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398173928] [2021-12-22 13:32:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:32:25,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:32:25,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:32:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:32:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:32:25,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 92 [2021-12-22 13:32:25,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 77 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 78.66666666666667) internal successors, (472), 6 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:32:25,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 92 [2021-12-22 13:32:25,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:32:25,919 INFO L129 PetriNetUnfolder]: 13/157 cut-off events. [2021-12-22 13:32:25,920 INFO L130 PetriNetUnfolder]: For 224/296 co-relation queries the response was YES. [2021-12-22 13:32:25,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 157 events. 13/157 cut-off events. For 224/296 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 476 event pairs, 7 based on Foata normal form. 10/160 useless extension candidates. Maximal degree in co-relation 310. Up to 26 conditions per place. [2021-12-22 13:32:25,923 INFO L132 encePairwiseOnDemand]: 86/92 looper letters, 9 selfloop transitions, 3 changer transitions 10/87 dead transitions. [2021-12-22 13:32:25,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 87 transitions, 342 flow [2021-12-22 13:32:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:32:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:32:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2021-12-22 13:32:25,926 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8647342995169082 [2021-12-22 13:32:25,926 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 716 transitions. [2021-12-22 13:32:25,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 716 transitions. [2021-12-22 13:32:25,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:32:25,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 716 transitions. [2021-12-22 13:32:25,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.55555555555556) internal successors, (716), 9 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,930 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,930 INFO L186 Difference]: Start difference. First operand has 105 places, 77 transitions, 226 flow. Second operand 9 states and 716 transitions. [2021-12-22 13:32:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 87 transitions, 342 flow [2021-12-22 13:32:25,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 87 transitions, 312 flow, removed 14 selfloop flow, removed 4 redundant places. [2021-12-22 13:32:25,936 INFO L242 Difference]: Finished difference. Result has 107 places, 77 transitions, 235 flow [2021-12-22 13:32:25,936 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=235, PETRI_PLACES=107, PETRI_TRANSITIONS=77} [2021-12-22 13:32:25,936 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 23 predicate places. [2021-12-22 13:32:25,937 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 77 transitions, 235 flow [2021-12-22 13:32:25,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.66666666666667) internal successors, (472), 6 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:25,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:32:25,937 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] [2021-12-22 13:32:25,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:32:25,938 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:32:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:32:25,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1443416475, now seen corresponding path program 1 times [2021-12-22 13:32:25,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:32:25,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51233650] [2021-12-22 13:32:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:32:25,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:32:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:32:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:32:26,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:32:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51233650] [2021-12-22 13:32:26,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51233650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:32:26,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:32:26,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:32:26,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889421400] [2021-12-22 13:32:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:32:26,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:32:26,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:32:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:32:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:32:26,108 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 92 [2021-12-22 13:32:26,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 77 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:32:26,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 92 [2021-12-22 13:32:26,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:32:26,381 INFO L129 PetriNetUnfolder]: 120/486 cut-off events. [2021-12-22 13:32:26,381 INFO L130 PetriNetUnfolder]: For 756/1326 co-relation queries the response was YES. [2021-12-22 13:32:26,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 486 events. 120/486 cut-off events. For 756/1326 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2657 event pairs, 11 based on Foata normal form. 10/481 useless extension candidates. Maximal degree in co-relation 1183. Up to 62 conditions per place. [2021-12-22 13:32:26,385 INFO L132 encePairwiseOnDemand]: 78/92 looper letters, 34 selfloop transitions, 15 changer transitions 45/148 dead transitions. [2021-12-22 13:32:26,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 148 transitions, 860 flow [2021-12-22 13:32:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:32:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:32:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1244 transitions. [2021-12-22 13:32:26,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7953964194373402 [2021-12-22 13:32:26,388 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1244 transitions. [2021-12-22 13:32:26,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1244 transitions. [2021-12-22 13:32:26,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:32:26,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1244 transitions. [2021-12-22 13:32:26,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 73.17647058823529) internal successors, (1244), 17 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 92.0) internal successors, (1656), 18 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,393 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 92.0) internal successors, (1656), 18 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,394 INFO L186 Difference]: Start difference. First operand has 107 places, 77 transitions, 235 flow. Second operand 17 states and 1244 transitions. [2021-12-22 13:32:26,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 148 transitions, 860 flow [2021-12-22 13:32:26,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 742 flow, removed 52 selfloop flow, removed 11 redundant places. [2021-12-22 13:32:26,403 INFO L242 Difference]: Finished difference. Result has 122 places, 85 transitions, 352 flow [2021-12-22 13:32:26,403 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=352, PETRI_PLACES=122, PETRI_TRANSITIONS=85} [2021-12-22 13:32:26,405 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 38 predicate places. [2021-12-22 13:32:26,405 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 85 transitions, 352 flow [2021-12-22 13:32:26,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,406 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:32:26,406 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:32:26,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:32:26,410 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:32:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:32:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1615688216, now seen corresponding path program 1 times [2021-12-22 13:32:26,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:32:26,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650345692] [2021-12-22 13:32:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:32:26,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:32:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:32:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:32:26,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:32:26,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650345692] [2021-12-22 13:32:26,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650345692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:32:26,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:32:26,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:32:26,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856101056] [2021-12-22 13:32:26,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:32:26,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:32:26,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:32:26,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:32:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:32:26,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 92 [2021-12-22 13:32:26,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 85 transitions, 352 flow. Second operand has 8 states, 8 states have (on average 70.25) internal successors, (562), 8 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:32:26,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 92 [2021-12-22 13:32:26,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:32:26,697 INFO L129 PetriNetUnfolder]: 69/364 cut-off events. [2021-12-22 13:32:26,697 INFO L130 PetriNetUnfolder]: For 976/1497 co-relation queries the response was YES. [2021-12-22 13:32:26,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 364 events. 69/364 cut-off events. For 976/1497 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1853 event pairs, 16 based on Foata normal form. 12/357 useless extension candidates. Maximal degree in co-relation 1079. Up to 65 conditions per place. [2021-12-22 13:32:26,700 INFO L132 encePairwiseOnDemand]: 80/92 looper letters, 25 selfloop transitions, 8 changer transitions 31/118 dead transitions. [2021-12-22 13:32:26,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 118 transitions, 768 flow [2021-12-22 13:32:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:32:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-22 13:32:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 801 transitions. [2021-12-22 13:32:26,703 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.791501976284585 [2021-12-22 13:32:26,703 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 801 transitions. [2021-12-22 13:32:26,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 801 transitions. [2021-12-22 13:32:26,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:32:26,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 801 transitions. [2021-12-22 13:32:26,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.81818181818181) internal successors, (801), 11 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,707 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,707 INFO L186 Difference]: Start difference. First operand has 122 places, 85 transitions, 352 flow. Second operand 11 states and 801 transitions. [2021-12-22 13:32:26,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 118 transitions, 768 flow [2021-12-22 13:32:26,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 118 transitions, 668 flow, removed 50 selfloop flow, removed 12 redundant places. [2021-12-22 13:32:26,715 INFO L242 Difference]: Finished difference. Result has 117 places, 81 transitions, 336 flow [2021-12-22 13:32:26,715 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=336, PETRI_PLACES=117, PETRI_TRANSITIONS=81} [2021-12-22 13:32:26,716 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2021-12-22 13:32:26,716 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 81 transitions, 336 flow [2021-12-22 13:32:26,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.25) internal successors, (562), 8 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:26,717 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:32:26,717 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] [2021-12-22 13:32:26,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:32:26,717 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:32:26,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:32:26,718 INFO L85 PathProgramCache]: Analyzing trace with hash 58466002, now seen corresponding path program 1 times [2021-12-22 13:32:26,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:32:26,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9124668] [2021-12-22 13:32:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:32:26,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:32:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:32:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:32:26,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:32:26,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9124668] [2021-12-22 13:32:26,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9124668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:32:26,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:32:26,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:32:26,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221329680] [2021-12-22 13:32:26,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:32:26,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:32:26,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:32:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:32:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:32:26,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:32:26,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 81 transitions, 336 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) [2021-12-22 13:32:26,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:32:26,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:32:26,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:32:26,944 INFO L129 PetriNetUnfolder]: 168/545 cut-off events. [2021-12-22 13:32:26,944 INFO L130 PetriNetUnfolder]: For 400/491 co-relation queries the response was YES. [2021-12-22 13:32:26,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 545 events. 168/545 cut-off events. For 400/491 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3326 event pairs, 17 based on Foata normal form. 1/497 useless extension candidates. Maximal degree in co-relation 1060. Up to 121 conditions per place. [2021-12-22 13:32:26,948 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 25 selfloop transitions, 14 changer transitions 7/113 dead transitions. [2021-12-22 13:32:26,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 113 transitions, 496 flow [2021-12-22 13:32:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:32:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:32:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2021-12-22 13:32:26,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8673913043478261 [2021-12-22 13:32:26,950 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2021-12-22 13:32:26,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2021-12-22 13:32:26,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:32:26,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2021-12-22 13:32:26,952 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) [2021-12-22 13:32:26,953 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) [2021-12-22 13:32:26,954 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) [2021-12-22 13:32:26,954 INFO L186 Difference]: Start difference. First operand has 117 places, 81 transitions, 336 flow. Second operand 10 states and 798 transitions. [2021-12-22 13:32:26,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 113 transitions, 496 flow [2021-12-22 13:32:26,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 437 flow, removed 15 selfloop flow, removed 16 redundant places. [2021-12-22 13:32:26,957 INFO L242 Difference]: Finished difference. Result has 110 places, 93 transitions, 380 flow [2021-12-22 13:32:26,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=380, PETRI_PLACES=110, PETRI_TRANSITIONS=93} [2021-12-22 13:32:26,959 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 26 predicate places. [2021-12-22 13:32:26,959 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 93 transitions, 380 flow [2021-12-22 13:32:26,959 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) [2021-12-22 13:32:26,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:32:26,959 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:32:26,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:32:26,960 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:32:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:32:26,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1928606749, now seen corresponding path program 1 times [2021-12-22 13:32:26,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:32:26,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892316742] [2021-12-22 13:32:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:32:26,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:32:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:32:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:32:27,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:32:27,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892316742] [2021-12-22 13:32:27,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892316742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:32:27,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:32:27,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:32:27,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94639513] [2021-12-22 13:32:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:32:27,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:32:27,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:32:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:32:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:32:27,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:32:27,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 93 transitions, 380 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) [2021-12-22 13:32:27,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:32:27,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:32:27,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:32:27,211 INFO L129 PetriNetUnfolder]: 148/521 cut-off events. [2021-12-22 13:32:27,211 INFO L130 PetriNetUnfolder]: For 1038/1132 co-relation queries the response was YES. [2021-12-22 13:32:27,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 521 events. 148/521 cut-off events. For 1038/1132 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3361 event pairs, 0 based on Foata normal form. 19/501 useless extension candidates. Maximal degree in co-relation 1570. Up to 146 conditions per place. [2021-12-22 13:32:27,215 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 21 selfloop transitions, 26 changer transitions 17/131 dead transitions. [2021-12-22 13:32:27,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 131 transitions, 744 flow [2021-12-22 13:32:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:32:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:32:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1035 transitions. [2021-12-22 13:32:27,217 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8653846153846154 [2021-12-22 13:32:27,217 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1035 transitions. [2021-12-22 13:32:27,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1035 transitions. [2021-12-22 13:32:27,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:32:27,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1035 transitions. [2021-12-22 13:32:27,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 79.61538461538461) internal successors, (1035), 13 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:27,221 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) [2021-12-22 13:32:27,221 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) [2021-12-22 13:32:27,221 INFO L186 Difference]: Start difference. First operand has 110 places, 93 transitions, 380 flow. Second operand 13 states and 1035 transitions. [2021-12-22 13:32:27,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 131 transitions, 744 flow [2021-12-22 13:32:27,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 131 transitions, 736 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-12-22 13:32:27,228 INFO L242 Difference]: Finished difference. Result has 126 places, 105 transitions, 543 flow [2021-12-22 13:32:27,228 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=543, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2021-12-22 13:32:27,230 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 42 predicate places. [2021-12-22 13:32:27,230 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 543 flow [2021-12-22 13:32:27,231 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) [2021-12-22 13:32:27,231 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:32:27,231 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:32:27,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:32:27,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:32:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:32:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash -366721664, now seen corresponding path program 1 times [2021-12-22 13:32:27,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:32:27,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573341563] [2021-12-22 13:32:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:32:27,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:32:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:32:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:32:27,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:32:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573341563] [2021-12-22 13:32:27,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573341563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:32:27,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:32:27,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:32:27,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853497901] [2021-12-22 13:32:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:32:27,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:32:27,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:32:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:32:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:32:27,320 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 92 [2021-12-22 13:32:27,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 543 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) [2021-12-22 13:32:27,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:32:27,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 92 [2021-12-22 13:32:27,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:32:27,500 INFO L129 PetriNetUnfolder]: 94/380 cut-off events. [2021-12-22 13:32:27,500 INFO L130 PetriNetUnfolder]: For 1551/1700 co-relation queries the response was YES. [2021-12-22 13:32:27,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 380 events. 94/380 cut-off events. For 1551/1700 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2373 event pairs, 0 based on Foata normal form. 14/357 useless extension candidates. Maximal degree in co-relation 1404. Up to 88 conditions per place. [2021-12-22 13:32:27,503 INFO L132 encePairwiseOnDemand]: 82/92 looper letters, 0 selfloop transitions, 0 changer transitions 123/123 dead transitions. [2021-12-22 13:32:27,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 123 transitions, 803 flow [2021-12-22 13:32:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:32:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-22 13:32:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1250 transitions. [2021-12-22 13:32:27,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8491847826086957 [2021-12-22 13:32:27,505 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1250 transitions. [2021-12-22 13:32:27,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1250 transitions. [2021-12-22 13:32:27,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:32:27,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1250 transitions. [2021-12-22 13:32:27,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 78.125) internal successors, (1250), 16 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:32:27,511 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) [2021-12-22 13:32:27,512 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) [2021-12-22 13:32:27,512 INFO L186 Difference]: Start difference. First operand has 126 places, 105 transitions, 543 flow. Second operand 16 states and 1250 transitions. [2021-12-22 13:32:27,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 123 transitions, 803 flow [2021-12-22 13:32:27,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 123 transitions, 739 flow, removed 24 selfloop flow, removed 5 redundant places. [2021-12-22 13:32:27,519 INFO L242 Difference]: Finished difference. Result has 129 places, 0 transitions, 0 flow [2021-12-22 13:32:27,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=129, PETRI_TRANSITIONS=0} [2021-12-22 13:32:27,519 INFO L334 CegarLoopForPetriNet]: 84 programPoint places, 45 predicate places. [2021-12-22 13:32:27,519 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 0 transitions, 0 flow [2021-12-22 13:32:27,520 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) [2021-12-22 13:32:27,521 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-22 13:32:27,522 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-22 13:32:27,522 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-22 13:32:27,522 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-22 13:32:27,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:32:27,525 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:32:27,527 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-22 13:32:27,527 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:32:27,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:32:27 BasicIcfg [2021-12-22 13:32:27,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:32:27,531 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:32:27,531 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:32:27,531 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:32:27,532 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:32:24" (3/4) ... [2021-12-22 13:32:27,533 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:32:27,538 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-22 13:32:27,538 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-22 13:32:27,538 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-22 13:32:27,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-22 13:32:27,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 13:32:27,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:32:27,543 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:32:27,569 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:32:27,569 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:32:27,570 INFO L158 Benchmark]: Toolchain (without parser) took 3575.90ms. Allocated memory was 88.1MB in the beginning and 144.7MB in the end (delta: 56.6MB). Free memory was 53.7MB in the beginning and 100.4MB in the end (delta: -46.6MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2021-12-22 13:32:27,570 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory was 48.2MB in the beginning and 48.2MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:32:27,570 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.33ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 53.5MB in the beginning and 85.1MB in the end (delta: -31.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 13:32:27,570 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.86ms. Allocated memory is still 119.5MB. Free memory was 85.1MB in the beginning and 83.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:32:27,571 INFO L158 Benchmark]: Boogie Preprocessor took 40.83ms. Allocated memory is still 119.5MB. Free memory was 83.1MB in the beginning and 81.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:32:27,572 INFO L158 Benchmark]: RCFGBuilder took 339.74ms. Allocated memory is still 119.5MB. Free memory was 81.6MB in the beginning and 69.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 13:32:27,573 INFO L158 Benchmark]: TraceAbstraction took 2683.63ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 69.0MB in the beginning and 103.5MB in the end (delta: -34.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:32:27,573 INFO L158 Benchmark]: Witness Printer took 38.22ms. Allocated memory is still 144.7MB. Free memory was 103.5MB in the beginning and 100.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 13:32:27,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory was 48.2MB in the beginning and 48.2MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.33ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 53.5MB in the beginning and 85.1MB in the end (delta: -31.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.86ms. Allocated memory is still 119.5MB. Free memory was 85.1MB in the beginning and 83.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.83ms. Allocated memory is still 119.5MB. Free memory was 83.1MB in the beginning and 81.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 339.74ms. Allocated memory is still 119.5MB. Free memory was 81.6MB in the beginning and 69.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2683.63ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 69.0MB in the beginning and 103.5MB in the end (delta: -34.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 38.22ms. Allocated memory is still 144.7MB. Free memory was 103.5MB in the beginning and 100.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.6s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 340 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 340 mSDsluCounter, 392 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 381 mSDsCounter, 87 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 440 IncrementalHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 87 mSolverCounterUnsat, 90 mSDtfsCounter, 440 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=543occurred in iteration=6, InterpolantAutomatonStates: 89, 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, 0.7s InterpolantComputationTime, 429 NumberOfCodeBlocks, 429 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 422 ConstructedInterpolants, 0 QuantifiedInterpolants, 1992 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! [2021-12-22 13:32:27,604 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