./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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-atomic/read_write_lock-2.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 ecef030c130295766ddc0f5ed2ee68fa94e82b73 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 00:07:52,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 00:07:52,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 00:07:52,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 00:07:52,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 00:07:52,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 00:07:52,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 00:07:52,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 00:07:52,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 00:07:52,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 00:07:52,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 00:07:52,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 00:07:52,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 00:07:52,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 00:07:52,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 00:07:52,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 00:07:52,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 00:07:52,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 00:07:52,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 00:07:52,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 00:07:52,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 00:07:52,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 00:07:52,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 00:07:52,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 00:07:52,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 00:07:52,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 00:07:52,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 00:07:52,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 00:07:52,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 00:07:52,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 00:07:52,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 00:07:52,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 00:07:52,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 00:07:52,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 00:07:52,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 00:07:52,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 00:07:52,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 00:07:52,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 00:07:52,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 00:07:52,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 00:07:52,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 00:07:52,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 00:07:52,816 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 00:07:52,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 00:07:52,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 00:07:52,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 00:07:52,818 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 00:07:52,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 00:07:52,819 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 00:07:52,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 00:07:52,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 00:07:52,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 00:07:52,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 00:07:52,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 00:07:52,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 00:07:52,821 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 00:07:52,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 00:07:52,821 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 00:07:52,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 00:07:52,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 00:07:52,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 00:07:52,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 00:07:52,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 00:07:52,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:07:52,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 00:07:52,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 00:07:52,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 00:07:52,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 00:07:52,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 00:07:52,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 00:07:52,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 00:07:52,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecef030c130295766ddc0f5ed2ee68fa94e82b73 [2020-10-26 00:07:53,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 00:07:53,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 00:07:53,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 00:07:53,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 00:07:53,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 00:07:53,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2020-10-26 00:07:53,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eeac7789/f1ca82a6b67c4543b8dacb1e3fd17e0c/FLAGec407ea96 [2020-10-26 00:07:53,920 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 00:07:53,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2020-10-26 00:07:53,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eeac7789/f1ca82a6b67c4543b8dacb1e3fd17e0c/FLAGec407ea96 [2020-10-26 00:07:54,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eeac7789/f1ca82a6b67c4543b8dacb1e3fd17e0c [2020-10-26 00:07:54,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 00:07:54,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 00:07:54,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 00:07:54,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 00:07:54,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 00:07:54,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b72df01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54, skipping insertion in model container [2020-10-26 00:07:54,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 00:07:54,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 00:07:54,543 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:07:54,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:07:54,685 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 00:07:54,703 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:07:54,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:07:54,837 INFO L208 MainTranslator]: Completed translation [2020-10-26 00:07:54,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54 WrapperNode [2020-10-26 00:07:54,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 00:07:54,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 00:07:54,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 00:07:54,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 00:07:54,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 00:07:54,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 00:07:54,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 00:07:54,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 00:07:54,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... [2020-10-26 00:07:54,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 00:07:54,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 00:07:54,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 00:07:54,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 00:07:54,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:07:55,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 00:07:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 00:07:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-26 00:07:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-10-26 00:07:55,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-10-26 00:07:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 00:07:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 00:07:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 00:07:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-26 00:07:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 00:07:55,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 00:07:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-10-26 00:07:55,025 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-10-26 00:07:55,027 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-26 00:07:55,576 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 00:07:55,576 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 00:07:55,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:55 BoogieIcfgContainer [2020-10-26 00:07:55,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 00:07:55,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 00:07:55,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 00:07:55,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 00:07:55,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 12:07:54" (1/3) ... [2020-10-26 00:07:55,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5d9d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:07:55, skipping insertion in model container [2020-10-26 00:07:55,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:54" (2/3) ... [2020-10-26 00:07:55,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5d9d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:07:55, skipping insertion in model container [2020-10-26 00:07:55,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:55" (3/3) ... [2020-10-26 00:07:55,588 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2020-10-26 00:07:55,600 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-26 00:07:55,600 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 00:07:55,606 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 00:07:55,607 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-26 00:07:55,642 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,642 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,643 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,643 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,643 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,643 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,643 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,644 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,644 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,644 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,644 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,645 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,645 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,645 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,645 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,645 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,646 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,646 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,646 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,646 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,647 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,647 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,647 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,647 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,647 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,648 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,648 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,648 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,648 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,649 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,649 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,649 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,649 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,649 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,649 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,650 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,650 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,650 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,651 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,651 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,651 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,651 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,651 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,651 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,652 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,652 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,652 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,653 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,653 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,653 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,653 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,653 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,654 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,654 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,656 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,656 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,657 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,657 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,657 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,657 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,660 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,660 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,660 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,660 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,661 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,661 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,661 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,661 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,661 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,665 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,665 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,665 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,665 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,665 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,666 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,668 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,669 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,669 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,669 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,669 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,669 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,670 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,670 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,670 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:55,700 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2020-10-26 00:07:55,713 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-26 00:07:55,734 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 00:07:55,734 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 00:07:55,735 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 00:07:55,735 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 00:07:55,735 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 00:07:55,735 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 00:07:55,735 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 00:07:55,735 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 00:07:55,749 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-26 00:07:55,751 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 102 transitions, 272 flow [2020-10-26 00:07:55,754 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 102 transitions, 272 flow [2020-10-26 00:07:55,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 103 places, 102 transitions, 272 flow [2020-10-26 00:07:55,867 INFO L129 PetriNetUnfolder]: 17/136 cut-off events. [2020-10-26 00:07:55,867 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-10-26 00:07:55,874 INFO L80 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 136 events. 17/136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 315 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 89. Up to 12 conditions per place. [2020-10-26 00:07:55,882 INFO L116 LiptonReduction]: Number of co-enabled transitions 2274 [2020-10-26 00:07:57,840 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-26 00:07:58,454 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-10-26 00:07:58,687 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 00:07:58,706 INFO L131 LiptonReduction]: Checked pairs total: 14874 [2020-10-26 00:07:58,707 INFO L133 LiptonReduction]: Total number of compositions: 45 [2020-10-26 00:07:58,714 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 57 transitions, 182 flow [2020-10-26 00:07:59,111 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5381 states. [2020-10-26 00:07:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states. [2020-10-26 00:07:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-26 00:07:59,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:59,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:59,122 INFO L429 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-26 00:07:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1957418352, now seen corresponding path program 1 times [2020-10-26 00:07:59,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:59,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440821276] [2020-10-26 00:07:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:07:59,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440821276] [2020-10-26 00:07:59,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:59,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:07:59,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839913180] [2020-10-26 00:07:59,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:07:59,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:07:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:07:59,491 INFO L87 Difference]: Start difference. First operand 5381 states. Second operand 4 states. [2020-10-26 00:07:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:59,848 INFO L93 Difference]: Finished difference Result 10812 states and 36249 transitions. [2020-10-26 00:07:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:07:59,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-26 00:07:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:59,938 INFO L225 Difference]: With dead ends: 10812 [2020-10-26 00:07:59,939 INFO L226 Difference]: Without dead ends: 7730 [2020-10-26 00:07:59,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:08:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7730 states. [2020-10-26 00:08:00,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7730 to 5052. [2020-10-26 00:08:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5052 states. [2020-10-26 00:08:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 17159 transitions. [2020-10-26 00:08:00,417 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 17159 transitions. Word has length 8 [2020-10-26 00:08:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:00,418 INFO L481 AbstractCegarLoop]: Abstraction has 5052 states and 17159 transitions. [2020-10-26 00:08:00,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:08:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 17159 transitions. [2020-10-26 00:08:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:08:00,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:00,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:00,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 00:08:00,421 INFO L429 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-26 00:08:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:00,422 INFO L82 PathProgramCache]: Analyzing trace with hash -102403622, now seen corresponding path program 1 times [2020-10-26 00:08:00,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:00,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461950918] [2020-10-26 00:08:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:00,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461950918] [2020-10-26 00:08:00,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:00,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:08:00,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438371511] [2020-10-26 00:08:00,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:08:00,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:00,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:08:00,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:08:00,476 INFO L87 Difference]: Start difference. First operand 5052 states and 17159 transitions. Second operand 3 states. [2020-10-26 00:08:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:00,603 INFO L93 Difference]: Finished difference Result 4317 states and 12958 transitions. [2020-10-26 00:08:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:08:00,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-26 00:08:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:00,643 INFO L225 Difference]: With dead ends: 4317 [2020-10-26 00:08:00,644 INFO L226 Difference]: Without dead ends: 4275 [2020-10-26 00:08:00,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:08:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-10-26 00:08:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4275. [2020-10-26 00:08:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4275 states. [2020-10-26 00:08:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 12848 transitions. [2020-10-26 00:08:00,857 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 12848 transitions. Word has length 10 [2020-10-26 00:08:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:00,858 INFO L481 AbstractCegarLoop]: Abstraction has 4275 states and 12848 transitions. [2020-10-26 00:08:00,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:08:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 12848 transitions. [2020-10-26 00:08:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:08:00,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:00,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:00,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 00:08:00,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-26 00:08:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash -115218448, now seen corresponding path program 2 times [2020-10-26 00:08:00,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:00,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553742813] [2020-10-26 00:08:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:01,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553742813] [2020-10-26 00:08:01,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:01,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:08:01,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890316426] [2020-10-26 00:08:01,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:08:01,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:01,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:08:01,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:08:01,061 INFO L87 Difference]: Start difference. First operand 4275 states and 12848 transitions. Second operand 4 states. [2020-10-26 00:08:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:01,126 INFO L93 Difference]: Finished difference Result 2906 states and 7004 transitions. [2020-10-26 00:08:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 00:08:01,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 00:08:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:01,145 INFO L225 Difference]: With dead ends: 2906 [2020-10-26 00:08:01,145 INFO L226 Difference]: Without dead ends: 2798 [2020-10-26 00:08:01,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:08:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2020-10-26 00:08:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2390. [2020-10-26 00:08:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2390 states. [2020-10-26 00:08:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 5909 transitions. [2020-10-26 00:08:01,315 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 5909 transitions. Word has length 10 [2020-10-26 00:08:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:01,317 INFO L481 AbstractCegarLoop]: Abstraction has 2390 states and 5909 transitions. [2020-10-26 00:08:01,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:08:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 5909 transitions. [2020-10-26 00:08:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 00:08:01,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:01,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:01,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 00:08:01,319 INFO L429 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-26 00:08:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash -485494678, now seen corresponding path program 1 times [2020-10-26 00:08:01,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:01,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513712760] [2020-10-26 00:08:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:01,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513712760] [2020-10-26 00:08:01,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:01,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:08:01,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499725334] [2020-10-26 00:08:01,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:08:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:08:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:08:01,375 INFO L87 Difference]: Start difference. First operand 2390 states and 5909 transitions. Second operand 4 states. [2020-10-26 00:08:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:01,466 INFO L93 Difference]: Finished difference Result 2639 states and 6454 transitions. [2020-10-26 00:08:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:08:01,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-26 00:08:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:01,490 INFO L225 Difference]: With dead ends: 2639 [2020-10-26 00:08:01,490 INFO L226 Difference]: Without dead ends: 1900 [2020-10-26 00:08:01,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:08:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-10-26 00:08:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1546. [2020-10-26 00:08:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-26 00:08:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3824 transitions. [2020-10-26 00:08:01,541 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3824 transitions. Word has length 12 [2020-10-26 00:08:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:01,542 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 3824 transitions. [2020-10-26 00:08:01,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:08:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3824 transitions. [2020-10-26 00:08:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 00:08:01,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:01,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:01,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 00:08:01,550 INFO L429 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-26 00:08:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1611753158, now seen corresponding path program 1 times [2020-10-26 00:08:01,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:01,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881842228] [2020-10-26 00:08:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:01,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881842228] [2020-10-26 00:08:01,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:01,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 00:08:01,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924932700] [2020-10-26 00:08:01,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 00:08:01,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:01,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 00:08:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:08:01,672 INFO L87 Difference]: Start difference. First operand 1546 states and 3824 transitions. Second operand 6 states. [2020-10-26 00:08:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:01,781 INFO L93 Difference]: Finished difference Result 1759 states and 4308 transitions. [2020-10-26 00:08:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 00:08:01,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 00:08:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:01,787 INFO L225 Difference]: With dead ends: 1759 [2020-10-26 00:08:01,787 INFO L226 Difference]: Without dead ends: 1641 [2020-10-26 00:08:01,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 00:08:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2020-10-26 00:08:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1509. [2020-10-26 00:08:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1509 states. [2020-10-26 00:08:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 3739 transitions. [2020-10-26 00:08:01,860 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 3739 transitions. Word has length 20 [2020-10-26 00:08:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:01,861 INFO L481 AbstractCegarLoop]: Abstraction has 1509 states and 3739 transitions. [2020-10-26 00:08:01,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 00:08:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 3739 transitions. [2020-10-26 00:08:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 00:08:01,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:01,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:01,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 00:08:01,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-26 00:08:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:01,864 INFO L82 PathProgramCache]: Analyzing trace with hash 290002040, now seen corresponding path program 2 times [2020-10-26 00:08:01,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:01,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167916914] [2020-10-26 00:08:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 00:08:01,900 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 00:08:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 00:08:01,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 00:08:01,954 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 00:08:01,955 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 00:08:01,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 00:08:01,974 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:01,974 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:01,978 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:01,978 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:01,978 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:01,979 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: { int l; __VERIFIER_atomic_take_read_lock(); __VERIFIER_atomic_begin(); l = x; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); y = l; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); if (!(y == x)) ERROR: reach_error(); __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); l = r-1; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); r = l; __VERIFIER_atomic_end(); return 0; } [719-738] [2020-10-26 00:08:01,980 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:01,981 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:01,982 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:01,982 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:02,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 12:08:02 BasicIcfg [2020-10-26 00:08:02,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 00:08:02,049 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 00:08:02,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 00:08:02,050 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 00:08:02,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:55" (3/4) ... [2020-10-26 00:08:02,055 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-26 00:08:02,066 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:02,066 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:02,067 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:02,067 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:02,067 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:02,067 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: { int l; __VERIFIER_atomic_take_read_lock(); __VERIFIER_atomic_begin(); l = x; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); y = l; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); if (!(y == x)) ERROR: reach_error(); __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); l = r-1; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); r = l; __VERIFIER_atomic_end(); return 0; } [719-738] [2020-10-26 00:08:02,068 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:02,068 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:02,068 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-26 00:08:02,068 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-26 00:08:02,166 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 00:08:02,167 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 00:08:02,168 INFO L168 Benchmark]: Toolchain (without parser) took 7914.58 ms. Allocated memory was 56.6 MB in the beginning and 264.2 MB in the end (delta: 207.6 MB). Free memory was 40.8 MB in the beginning and 139.5 MB in the end (delta: -98.7 MB). Peak memory consumption was 108.8 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:02,169 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 46.1 MB. Free memory is still 25.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:02,172 INFO L168 Benchmark]: CACSL2BoogieTranslator took 576.01 ms. Allocated memory is still 56.6 MB. Free memory was 40.2 MB in the beginning and 36.6 MB in the end (delta: 3.6 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:02,173 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.29 ms. Allocated memory is still 56.6 MB. Free memory was 36.3 MB in the beginning and 34.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:02,174 INFO L168 Benchmark]: Boogie Preprocessor took 28.60 ms. Allocated memory is still 56.6 MB. Free memory was 34.5 MB in the beginning and 33.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:02,174 INFO L168 Benchmark]: RCFGBuilder took 649.40 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 42.2 MB in the end (delta: -9.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:02,178 INFO L168 Benchmark]: TraceAbstraction took 6468.60 ms. Allocated memory was 69.2 MB in the beginning and 264.2 MB in the end (delta: 195.0 MB). Free memory was 41.5 MB in the beginning and 146.8 MB in the end (delta: -105.3 MB). Peak memory consumption was 90.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:02,179 INFO L168 Benchmark]: Witness Printer took 117.44 ms. Allocated memory is still 264.2 MB. Free memory was 146.8 MB in the beginning and 139.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:02,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 46.1 MB. Free memory is still 25.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 576.01 ms. Allocated memory is still 56.6 MB. Free memory was 40.2 MB in the beginning and 36.6 MB in the end (delta: 3.6 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.29 ms. Allocated memory is still 56.6 MB. Free memory was 36.3 MB in the beginning and 34.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.60 ms. Allocated memory is still 56.6 MB. Free memory was 34.5 MB in the beginning and 33.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 649.40 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 42.2 MB in the end (delta: -9.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6468.60 ms. Allocated memory was 69.2 MB in the beginning and 264.2 MB in the end (delta: 195.0 MB). Free memory was 41.5 MB in the beginning and 146.8 MB in the end (delta: -105.3 MB). Peak memory consumption was 90.1 MB. Max. memory is 16.1 GB. * Witness Printer took 117.44 ms. Allocated memory is still 264.2 MB. Free memory was 146.8 MB in the beginning and 139.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1789 VarBasedMoverChecksPositive, 55 VarBasedMoverChecksNegative, 8 SemBasedMoverChecksPositive, 47 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 800 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.9s, 103 PlacesBefore, 58 PlacesAfterwards, 102 TransitionsBefore, 57 TransitionsAfterwards, 2274 CoEnabledTransitionPairs, 5 FixpointIterations, 27 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 45 TotalNumberOfCompositions, 14874 MoverChecksTotal - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L740] 0 pthread_t t1, t2, t3, t4; [L741] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, w=0, x=0, y=0] [L742] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L720] 2 int l; [L721] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND TRUE 2 !cond [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L721] RET 2 __VERIFIER_atomic_take_read_lock() [L723] 2 l = x VAL [r=1, w=0, x=0, y=0] [L726] 2 y = l VAL [r=1, w=0, x=0, y=0] [L729] COND TRUE 2 !(y == x) [L16] COND TRUE 2 0 VAL [r=1, w=0, x=0, y=0] [L732] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L743] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L744] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L720] 4 int l; [L721] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND TRUE 4 !cond [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L721] RET 4 __VERIFIER_atomic_take_read_lock() [L735] 2 r = l [L737] 2 return 0; [L714] CALL 3 __VERIFIER_atomic_take_write_lock() [L706] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND TRUE 3 !cond [L706] RET 3 assume_abort_if_not(w==0 && r==0) [L707] 3 w = 1 [L714] RET 3 __VERIFIER_atomic_take_write_lock() [L723] 4 l = x VAL [r=0, w=1, x=0, y=0] [L726] 4 y = l VAL [r=0, w=1, x=0, y=0] [L715] 3 x = 3 VAL [r=0, w=1, x=3, y=0] [L729] COND TRUE 4 !(y == x) [L16] COND FALSE 4 !(0) [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 432 SDtfs, 409 SDslu, 522 SDs, 0 SdLazy, 150 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5381occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 5 MinimizatonAttempts, 3572 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 1479 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...