./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-atomic/read_write_lock-1.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-1.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 280f0feeebe3d97074649cbbceb2d2772c1953fc ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 00:07:50,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 00:07:50,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 00:07:50,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 00:07:50,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 00:07:50,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 00:07:50,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 00:07:50,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 00:07:50,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 00:07:50,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 00:07:50,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 00:07:50,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 00:07:50,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 00:07:50,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 00:07:50,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 00:07:50,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 00:07:50,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 00:07:50,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 00:07:50,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 00:07:50,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 00:07:50,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 00:07:50,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 00:07:50,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 00:07:50,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 00:07:50,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 00:07:50,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 00:07:50,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 00:07:50,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 00:07:50,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 00:07:50,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 00:07:50,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 00:07:50,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 00:07:50,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 00:07:50,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 00:07:50,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 00:07:50,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 00:07:50,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 00:07:50,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 00:07:50,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 00:07:50,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 00:07:50,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 00:07:50,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 00:07:50,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 00:07:50,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 00:07:50,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 00:07:50,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 00:07:50,975 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 00:07:50,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 00:07:50,976 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 00:07:50,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 00:07:50,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 00:07:50,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 00:07:50,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 00:07:50,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 00:07:50,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 00:07:50,977 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 00:07:50,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 00:07:50,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 00:07:50,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 00:07:50,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 00:07:50,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 00:07:50,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 00:07:50,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 00:07:50,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:07:50,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 00:07:50,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 00:07:50,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 00:07:50,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 00:07:50,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 00:07:50,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 00:07:50,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 00:07:50,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 280f0feeebe3d97074649cbbceb2d2772c1953fc [2020-10-26 00:07:51,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 00:07:51,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 00:07:51,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 00:07:51,484 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 00:07:51,485 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 00:07:51,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2020-10-26 00:07:51,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b610300/cc73ced18654438a826c6c9eb11596fa/FLAG889a45a7b [2020-10-26 00:07:52,320 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 00:07:52,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2020-10-26 00:07:52,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b610300/cc73ced18654438a826c6c9eb11596fa/FLAG889a45a7b [2020-10-26 00:07:52,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b610300/cc73ced18654438a826c6c9eb11596fa [2020-10-26 00:07:52,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 00:07:52,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 00:07:52,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 00:07:52,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 00:07:52,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 00:07:52,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:07:52" (1/1) ... [2020-10-26 00:07:52,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@563eecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:52, skipping insertion in model container [2020-10-26 00:07:52,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:07:52" (1/1) ... [2020-10-26 00:07:52,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 00:07:52,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 00:07:52,908 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:07:53,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:07:53,152 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 00:07:53,190 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:07:53,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:07:53,355 INFO L208 MainTranslator]: Completed translation [2020-10-26 00:07:53,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53 WrapperNode [2020-10-26 00:07:53,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 00:07:53,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 00:07:53,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 00:07:53,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 00:07:53,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 00:07:53,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 00:07:53,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 00:07:53,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 00:07:53,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (1/1) ... [2020-10-26 00:07:53,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 00:07:53,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 00:07:53,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 00:07:53,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 00:07:53,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (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 00:07:53,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 00:07:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 00:07:53,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-26 00:07:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-10-26 00:07:53,565 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-10-26 00:07:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 00:07:53,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 00:07:53,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 00:07:53,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-26 00:07:53,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 00:07:53,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 00:07:53,567 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-10-26 00:07:53,568 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-10-26 00:07:53,570 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 00:07:54,172 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 00:07:54,172 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 00:07:54,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:54 BoogieIcfgContainer [2020-10-26 00:07:54,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 00:07:54,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 00:07:54,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 00:07:54,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 00:07:54,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 12:07:52" (1/3) ... [2020-10-26 00:07:54,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc010e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:07:54, skipping insertion in model container [2020-10-26 00:07:54,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:07:53" (2/3) ... [2020-10-26 00:07:54,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc010e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:07:54, skipping insertion in model container [2020-10-26 00:07:54,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:54" (3/3) ... [2020-10-26 00:07:54,186 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-1.i [2020-10-26 00:07:54,199 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-26 00:07:54,199 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 00:07:54,205 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 00:07:54,206 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-26 00:07:54,237 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,238 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,238 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,238 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,239 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,239 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,239 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,240 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,240 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,241 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,241 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,241 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,241 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,242 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,242 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,243 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,243 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,243 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,244 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,244 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,244 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,245 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,245 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,245 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,246 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,246 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,246 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,247 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,247 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,247 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,248 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,248 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,248 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,248 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,249 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,249 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,249 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,250 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,250 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,250 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,250 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,251 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,251 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,251 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,252 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,252 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,255 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,255 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,256 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,256 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,256 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,256 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,257 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,257 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,257 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,260 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,260 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,260 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,260 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,261 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,261 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,263 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,264 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,264 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,264 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,264 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,264 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,265 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,265 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,265 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,268 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,268 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,268 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,268 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,269 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,269 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:07:54,289 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2020-10-26 00:07:54,303 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-26 00:07:54,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 00:07:54,329 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 00:07:54,329 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 00:07:54,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 00:07:54,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 00:07:54,330 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 00:07:54,330 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 00:07:54,331 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 00:07:54,345 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-26 00:07:54,348 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 112 transitions, 292 flow [2020-10-26 00:07:54,352 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 112 transitions, 292 flow [2020-10-26 00:07:54,354 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 109 places, 112 transitions, 292 flow [2020-10-26 00:07:54,427 INFO L129 PetriNetUnfolder]: 21/146 cut-off events. [2020-10-26 00:07:54,428 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-10-26 00:07:54,435 INFO L80 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 146 events. 21/146 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 355 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 99. Up to 12 conditions per place. [2020-10-26 00:07:54,442 INFO L116 LiptonReduction]: Number of co-enabled transitions 3184 [2020-10-26 00:07:56,540 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-26 00:07:56,740 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-26 00:07:57,265 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2020-10-26 00:07:57,487 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 00:07:57,583 INFO L131 LiptonReduction]: Checked pairs total: 21686 [2020-10-26 00:07:57,583 INFO L133 LiptonReduction]: Total number of compositions: 79 [2020-10-26 00:07:57,593 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 57 transitions, 182 flow [2020-10-26 00:07:57,975 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 4306 states. [2020-10-26 00:07:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states. [2020-10-26 00:07:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-26 00:07:57,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:57,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:57,989 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 00:07:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash -256763381, now seen corresponding path program 1 times [2020-10-26 00:07:58,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:58,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032336683] [2020-10-26 00:07:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:58,298 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 00:07:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032336683] [2020-10-26 00:07:58,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:58,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:07:58,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712673859] [2020-10-26 00:07:58,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:07:58,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:07:58,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:07:58,333 INFO L87 Difference]: Start difference. First operand 4306 states. Second operand 4 states. [2020-10-26 00:07:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:58,690 INFO L93 Difference]: Finished difference Result 9727 states and 31398 transitions. [2020-10-26 00:07:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:07:58,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-26 00:07:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:58,803 INFO L225 Difference]: With dead ends: 9727 [2020-10-26 00:07:58,803 INFO L226 Difference]: Without dead ends: 7325 [2020-10-26 00:07:58,805 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 00:07:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7325 states. [2020-10-26 00:07:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7325 to 4376. [2020-10-26 00:07:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4376 states. [2020-10-26 00:07:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4376 states to 4376 states and 14751 transitions. [2020-10-26 00:07:59,205 INFO L78 Accepts]: Start accepts. Automaton has 4376 states and 14751 transitions. Word has length 8 [2020-10-26 00:07:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:59,206 INFO L481 AbstractCegarLoop]: Abstraction has 4376 states and 14751 transitions. [2020-10-26 00:07:59,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:07:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4376 states and 14751 transitions. [2020-10-26 00:07:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:07:59,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:59,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:59,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 00:07:59,213 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 00:07:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1936489280, now seen corresponding path program 1 times [2020-10-26 00:07:59,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:59,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494540970] [2020-10-26 00:07:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:07:59,327 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 00:07:59,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494540970] [2020-10-26 00:07:59,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:07:59,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:07:59,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751017090] [2020-10-26 00:07:59,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:07:59,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:07:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:07:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:07:59,331 INFO L87 Difference]: Start difference. First operand 4376 states and 14751 transitions. Second operand 4 states. [2020-10-26 00:07:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:07:59,498 INFO L93 Difference]: Finished difference Result 6872 states and 20348 transitions. [2020-10-26 00:07:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 00:07:59,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 00:07:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:07:59,553 INFO L225 Difference]: With dead ends: 6872 [2020-10-26 00:07:59,554 INFO L226 Difference]: Without dead ends: 6776 [2020-10-26 00:07:59,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:07:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2020-10-26 00:07:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 4772. [2020-10-26 00:07:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4772 states. [2020-10-26 00:07:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 14625 transitions. [2020-10-26 00:07:59,834 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 14625 transitions. Word has length 10 [2020-10-26 00:07:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:07:59,835 INFO L481 AbstractCegarLoop]: Abstraction has 4772 states and 14625 transitions. [2020-10-26 00:07:59,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:07:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 14625 transitions. [2020-10-26 00:07:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:07:59,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:07:59,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:07:59,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 00:07:59,843 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 00:07:59,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:07:59,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1632508856, now seen corresponding path program 2 times [2020-10-26 00:07:59,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:07:59,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676593910] [2020-10-26 00:07:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:07:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:00,000 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 00:08:00,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676593910] [2020-10-26 00:08:00,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:00,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:08:00,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317884568] [2020-10-26 00:08:00,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:08:00,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:00,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:08:00,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:08:00,005 INFO L87 Difference]: Start difference. First operand 4772 states and 14625 transitions. Second operand 3 states. [2020-10-26 00:08:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:00,051 INFO L93 Difference]: Finished difference Result 2244 states and 5528 transitions. [2020-10-26 00:08:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:08:00,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-26 00:08:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:00,080 INFO L225 Difference]: With dead ends: 2244 [2020-10-26 00:08:00,080 INFO L226 Difference]: Without dead ends: 2180 [2020-10-26 00:08:00,081 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 00:08:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2020-10-26 00:08:00,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 2180. [2020-10-26 00:08:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2180 states. [2020-10-26 00:08:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 5394 transitions. [2020-10-26 00:08:00,187 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 5394 transitions. Word has length 10 [2020-10-26 00:08:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:00,188 INFO L481 AbstractCegarLoop]: Abstraction has 2180 states and 5394 transitions. [2020-10-26 00:08:00,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:08:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 5394 transitions. [2020-10-26 00:08:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 00:08:00,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:00,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:00,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 00:08:00,194 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 00:08:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:00,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1490641748, now seen corresponding path program 1 times [2020-10-26 00:08:00,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:00,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869308087] [2020-10-26 00:08:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:00,295 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 00:08:00,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869308087] [2020-10-26 00:08:00,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:00,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:08:00,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190846457] [2020-10-26 00:08:00,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:08:00,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:08:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:08:00,300 INFO L87 Difference]: Start difference. First operand 2180 states and 5394 transitions. Second operand 4 states. [2020-10-26 00:08:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:00,435 INFO L93 Difference]: Finished difference Result 2507 states and 6115 transitions. [2020-10-26 00:08:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:08:00,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-26 00:08:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:00,443 INFO L225 Difference]: With dead ends: 2507 [2020-10-26 00:08:00,443 INFO L226 Difference]: Without dead ends: 1814 [2020-10-26 00:08:00,444 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 00:08:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2020-10-26 00:08:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1440. [2020-10-26 00:08:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2020-10-26 00:08:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3564 transitions. [2020-10-26 00:08:00,507 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3564 transitions. Word has length 12 [2020-10-26 00:08:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:00,508 INFO L481 AbstractCegarLoop]: Abstraction has 1440 states and 3564 transitions. [2020-10-26 00:08:00,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:08:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3564 transitions. [2020-10-26 00:08:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:08:00,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:00,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:00,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 00:08:00,512 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 00:08:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1573076366, now seen corresponding path program 1 times [2020-10-26 00:08:00,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:00,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173800355] [2020-10-26 00:08:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:00,612 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 00:08:00,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173800355] [2020-10-26 00:08:00,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:00,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:08:00,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364115847] [2020-10-26 00:08:00,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 00:08:00,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 00:08:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:08:00,617 INFO L87 Difference]: Start difference. First operand 1440 states and 3564 transitions. Second operand 5 states. [2020-10-26 00:08:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:00,673 INFO L93 Difference]: Finished difference Result 1734 states and 4180 transitions. [2020-10-26 00:08:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:08:00,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 00:08:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:00,679 INFO L225 Difference]: With dead ends: 1734 [2020-10-26 00:08:00,680 INFO L226 Difference]: Without dead ends: 1508 [2020-10-26 00:08:00,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 00:08:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2020-10-26 00:08:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1376. [2020-10-26 00:08:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2020-10-26 00:08:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 3414 transitions. [2020-10-26 00:08:00,736 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 3414 transitions. Word has length 19 [2020-10-26 00:08:00,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:00,736 INFO L481 AbstractCegarLoop]: Abstraction has 1376 states and 3414 transitions. [2020-10-26 00:08:00,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 00:08:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 3414 transitions. [2020-10-26 00:08:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:08:00,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:00,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:00,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 00:08:00,740 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 00:08:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash -144078048, now seen corresponding path program 2 times [2020-10-26 00:08:00,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:00,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731164261] [2020-10-26 00:08:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:00,860 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 00:08:00,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731164261] [2020-10-26 00:08:00,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:00,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:08:00,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699515664] [2020-10-26 00:08:00,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 00:08:00,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 00:08:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:08:00,866 INFO L87 Difference]: Start difference. First operand 1376 states and 3414 transitions. Second operand 5 states. [2020-10-26 00:08:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:00,897 INFO L93 Difference]: Finished difference Result 530 states and 1160 transitions. [2020-10-26 00:08:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:08:00,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 00:08:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:00,898 INFO L225 Difference]: With dead ends: 530 [2020-10-26 00:08:00,898 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 00:08:00,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:08:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 00:08:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 00:08:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 00:08:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 00:08:00,908 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-26 00:08:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:00,909 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 00:08:00,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 00:08:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 00:08:00,909 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 00:08:00,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 00:08:00,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 12:08:00 BasicIcfg [2020-10-26 00:08:00,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 00:08:00,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 00:08:00,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 00:08:00,914 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 00:08:00,915 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:07:54" (3/4) ... [2020-10-26 00:08:00,918 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 00:08:00,925 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reader [2020-10-26 00:08:00,925 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure writer [2020-10-26 00:08:00,934 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-10-26 00:08:00,934 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-26 00:08:00,935 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:08:00,935 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:08:01,005 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 00:08:01,005 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 00:08:01,010 INFO L168 Benchmark]: Toolchain (without parser) took 8385.23 ms. Allocated memory was 46.1 MB in the beginning and 302.0 MB in the end (delta: 255.9 MB). Free memory was 21.9 MB in the beginning and 236.0 MB in the end (delta: -214.1 MB). Peak memory consumption was 42.3 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:01,011 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory is still 24.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:01,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.52 ms. Allocated memory was 46.1 MB in the beginning and 62.9 MB in the end (delta: 16.8 MB). Free memory was 21.2 MB in the beginning and 34.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:01,014 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.01 ms. Allocated memory is still 62.9 MB. Free memory was 34.9 MB in the beginning and 32.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:01,014 INFO L168 Benchmark]: Boogie Preprocessor took 43.26 ms. Allocated memory is still 62.9 MB. Free memory was 32.8 MB in the beginning and 31.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:01,017 INFO L168 Benchmark]: RCFGBuilder took 702.79 ms. Allocated memory is still 62.9 MB. Free memory was 31.4 MB in the beginning and 39.0 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:01,018 INFO L168 Benchmark]: TraceAbstraction took 6736.12 ms. Allocated memory was 62.9 MB in the beginning and 302.0 MB in the end (delta: 239.1 MB). Free memory was 38.7 MB in the beginning and 239.1 MB in the end (delta: -200.4 MB). Peak memory consumption was 55.5 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:01,020 INFO L168 Benchmark]: Witness Printer took 93.70 ms. Allocated memory is still 302.0 MB. Free memory was 239.1 MB in the beginning and 236.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:01,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory is still 24.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 722.52 ms. Allocated memory was 46.1 MB in the beginning and 62.9 MB in the end (delta: 16.8 MB). Free memory was 21.2 MB in the beginning and 34.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.01 ms. Allocated memory is still 62.9 MB. Free memory was 34.9 MB in the beginning and 32.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.26 ms. Allocated memory is still 62.9 MB. Free memory was 32.8 MB in the beginning and 31.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 702.79 ms. Allocated memory is still 62.9 MB. Free memory was 31.4 MB in the beginning and 39.0 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6736.12 ms. Allocated memory was 62.9 MB in the beginning and 302.0 MB in the end (delta: 239.1 MB). Free memory was 38.7 MB in the beginning and 239.1 MB in the end (delta: -200.4 MB). Peak memory consumption was 55.5 MB. Max. memory is 16.1 GB. * Witness Printer took 93.70 ms. Allocated memory is still 302.0 MB. Free memory was 239.1 MB in the beginning and 236.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2783 VarBasedMoverChecksPositive, 122 VarBasedMoverChecksNegative, 68 SemBasedMoverChecksPositive, 54 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.5s, 854 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.2s, 109 PlacesBefore, 56 PlacesAfterwards, 112 TransitionsBefore, 57 TransitionsAfterwards, 3184 CoEnabledTransitionPairs, 8 FixpointIterations, 27 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 79 TotalNumberOfCompositions, 21686 MoverChecksTotal - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 466 SDtfs, 439 SDslu, 510 SDs, 0 SdLazy, 137 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4772occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 6 MinimizatonAttempts, 5459 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 2276 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 correct! Received shutdown request...