./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/stateful_check.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer --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 a342581b7572d5ebcb4a58d0a914c795d7fcf5cd ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-29 22:41:12,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:41:12,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:41:12,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:41:12,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:41:12,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:41:12,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:41:13,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:41:13,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:41:13,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:41:13,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:41:13,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:41:13,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:41:13,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:41:13,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:41:13,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:41:13,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:41:13,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:41:13,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:41:13,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:41:13,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:41:13,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:41:13,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:41:13,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:41:13,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:41:13,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:41:13,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:41:13,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:41:13,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:41:13,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:41:13,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:41:13,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:41:13,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:41:13,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:41:13,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:41:13,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:41:13,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:41:13,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:41:13,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:41:13,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:41:13,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:41:13,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:41:13,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:41:13,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:41:13,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:41:13,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:41:13,072 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:41:13,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:41:13,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:41:13,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:41:13,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:41:13,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:41:13,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:41:13,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:41:13,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:41:13,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:41:13,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:41:13,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:41:13,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:41:13,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:41:13,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:41:13,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:41:13,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:41:13,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:41:13,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:41:13,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:41:13,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:41:13,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:41:13,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:41:13,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:41:13,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:41:13,077 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:/tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a342581b7572d5ebcb4a58d0a914c795d7fcf5cd [2020-11-29 22:41:13,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:41:13,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:41:13,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:41:13,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:41:13,361 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:41:13,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2020-11-29 22:41:13,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/data/4f619a835/94baeb2320a341f980bc064c20cab959/FLAG3f28ce985 [2020-11-29 22:41:13,885 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:41:13,886 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/sv-benchmarks/c/ldv-regression/stateful_check.c [2020-11-29 22:41:13,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/data/4f619a835/94baeb2320a341f980bc064c20cab959/FLAG3f28ce985 [2020-11-29 22:41:14,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/data/4f619a835/94baeb2320a341f980bc064c20cab959 [2020-11-29 22:41:14,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:41:14,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:41:14,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:41:14,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:41:14,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:41:14,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672f2093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14, skipping insertion in model container [2020-11-29 22:41:14,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:41:14,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:41:14,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:41:14,537 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:41:14,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:41:14,572 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:41:14,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14 WrapperNode [2020-11-29 22:41:14,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:41:14,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:41:14,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:41:14,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:41:14,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:41:14,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:41:14,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:41:14,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:41:14,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... [2020-11-29 22:41:14,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:41:14,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:41:14,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:41:14,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:41:14,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/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 [2020-11-29 22:41:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:41:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:41:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:41:14,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:41:15,107 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:41:15,107 INFO L298 CfgBuilder]: Removed 45 assume(true) statements. [2020-11-29 22:41:15,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:41:15 BoogieIcfgContainer [2020-11-29 22:41:15,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:41:15,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:41:15,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:41:15,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:41:15,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:41:14" (1/3) ... [2020-11-29 22:41:15,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12451b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:41:15, skipping insertion in model container [2020-11-29 22:41:15,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:41:14" (2/3) ... [2020-11-29 22:41:15,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12451b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:41:15, skipping insertion in model container [2020-11-29 22:41:15,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:41:15" (3/3) ... [2020-11-29 22:41:15,118 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-11-29 22:41:15,129 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:41:15,133 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-29 22:41:15,146 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-29 22:41:15,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:41:15,179 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:41:15,179 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:41:15,180 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:41:15,180 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:41:15,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:41:15,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:41:15,180 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:41:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-11-29 22:41:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 22:41:15,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:41:15,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 22:41:15,200 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:41:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:41:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 889613073, now seen corresponding path program 1 times [2020-11-29 22:41:15,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:41:15,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548529166] [2020-11-29 22:41:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:41:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:41:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:41:15,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548529166] [2020-11-29 22:41:15,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:41:15,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:41:15,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495343428] [2020-11-29 22:41:15,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:41:15,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:41:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:41:15,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:41:15,357 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-11-29 22:41:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:41:15,378 INFO L93 Difference]: Finished difference Result 94 states and 128 transitions. [2020-11-29 22:41:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:41:15,379 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 22:41:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:41:15,387 INFO L225 Difference]: With dead ends: 94 [2020-11-29 22:41:15,388 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 22:41:15,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:41:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 22:41:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 22:41:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 22:41:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-11-29 22:41:15,426 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 6 [2020-11-29 22:41:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:41:15,427 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-11-29 22:41:15,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:41:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-11-29 22:41:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 22:41:15,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:41:15,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:41:15,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:41:15,428 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:41:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:41:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1804047174, now seen corresponding path program 1 times [2020-11-29 22:41:15,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:41:15,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66524149] [2020-11-29 22:41:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:41:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:41:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:41:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66524149] [2020-11-29 22:41:15,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:41:15,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:41:15,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148169076] [2020-11-29 22:41:15,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:41:15,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:41:15,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:41:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:41:15,479 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 3 states. [2020-11-29 22:41:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:41:15,574 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-11-29 22:41:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:41:15,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-29 22:41:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:41:15,578 INFO L225 Difference]: With dead ends: 70 [2020-11-29 22:41:15,578 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 22:41:15,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:41:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 22:41:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-29 22:41:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 22:41:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-11-29 22:41:15,589 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 7 [2020-11-29 22:41:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:41:15,590 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-11-29 22:41:15,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:41:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-11-29 22:41:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 22:41:15,593 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:41:15,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:41:15,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:41:15,594 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:41:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:41:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash -117779964, now seen corresponding path program 1 times [2020-11-29 22:41:15,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:41:15,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690426477] [2020-11-29 22:41:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:41:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:41:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:41:15,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690426477] [2020-11-29 22:41:15,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:41:15,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:41:15,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555279921] [2020-11-29 22:41:15,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:41:15,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:41:15,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:41:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:41:15,666 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 3 states. [2020-11-29 22:41:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:41:15,759 INFO L93 Difference]: Finished difference Result 150 states and 212 transitions. [2020-11-29 22:41:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:41:15,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-29 22:41:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:41:15,764 INFO L225 Difference]: With dead ends: 150 [2020-11-29 22:41:15,764 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 22:41:15,765 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 [2020-11-29 22:41:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 22:41:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-11-29 22:41:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 22:41:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2020-11-29 22:41:15,782 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 15 [2020-11-29 22:41:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:41:15,782 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2020-11-29 22:41:15,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:41:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2020-11-29 22:41:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 22:41:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:41:15,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:41:15,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 22:41:15,784 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:41:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:41:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1023840060, now seen corresponding path program 1 times [2020-11-29 22:41:15,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:41:15,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412680376] [2020-11-29 22:41:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:41:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:41:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:41:15,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412680376] [2020-11-29 22:41:15,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945291549] [2020-11-29 22:41:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:41:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:41:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 22:41:15,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:41:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:41:16,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:41:16,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 22:41:16,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926280281] [2020-11-29 22:41:16,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:41:16,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:41:16,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:41:16,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:41:16,013 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand 5 states. [2020-11-29 22:41:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:41:16,138 INFO L93 Difference]: Finished difference Result 228 states and 329 transitions. [2020-11-29 22:41:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:41:16,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-29 22:41:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:41:16,141 INFO L225 Difference]: With dead ends: 228 [2020-11-29 22:41:16,141 INFO L226 Difference]: Without dead ends: 144 [2020-11-29 22:41:16,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:41:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-29 22:41:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2020-11-29 22:41:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-29 22:41:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2020-11-29 22:41:16,159 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 22 [2020-11-29 22:41:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:41:16,160 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2020-11-29 22:41:16,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:41:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2020-11-29 22:41:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 22:41:16,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:41:16,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:41:16,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:41:16,390 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:41:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:41:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash -278056186, now seen corresponding path program 1 times [2020-11-29 22:41:16,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:41:16,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356318775] [2020-11-29 22:41:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:41:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:41:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 22:41:16,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356318775] [2020-11-29 22:41:16,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:41:16,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:41:16,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862763437] [2020-11-29 22:41:16,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:41:16,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:41:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:41:16,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:41:16,471 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand 4 states. [2020-11-29 22:41:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:41:16,585 INFO L93 Difference]: Finished difference Result 369 states and 555 transitions. [2020-11-29 22:41:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:41:16,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-29 22:41:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:41:16,589 INFO L225 Difference]: With dead ends: 369 [2020-11-29 22:41:16,589 INFO L226 Difference]: Without dead ends: 237 [2020-11-29 22:41:16,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:41:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-11-29 22:41:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2020-11-29 22:41:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-11-29 22:41:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2020-11-29 22:41:16,614 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 29 [2020-11-29 22:41:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:41:16,614 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2020-11-29 22:41:16,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:41:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2020-11-29 22:41:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 22:41:16,616 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:41:16,617 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:41:16,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 22:41:16,617 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:41:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:41:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1243698636, now seen corresponding path program 1 times [2020-11-29 22:41:16,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:41:16,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326443232] [2020-11-29 22:41:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:41:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:41:16,649 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:41:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:41:16,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:41:16,726 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:41:16,727 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 22:41:16,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 22:41:16,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:41:16 BoogieIcfgContainer [2020-11-29 22:41:16,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:41:16,814 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:41:16,814 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:41:16,814 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:41:16,815 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:41:15" (3/4) ... [2020-11-29 22:41:16,817 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 22:41:16,884 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_addaf1c6-4af9-4d25-bc8d-ef11310df8c2/bin/uautomizer/witness.graphml [2020-11-29 22:41:16,894 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:41:16,899 INFO L168 Benchmark]: Toolchain (without parser) took 2618.56 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 68.8 MB in the beginning and 81.3 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:41:16,899 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 102.8 MB. Free memory was 74.3 MB in the beginning and 74.3 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:41:16,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.22 ms. Allocated memory is still 102.8 MB. Free memory was 68.5 MB in the beginning and 78.9 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:41:16,901 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.90 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:41:16,902 INFO L168 Benchmark]: Boogie Preprocessor took 42.39 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:41:16,908 INFO L168 Benchmark]: RCFGBuilder took 444.87 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 58.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 22:41:16,908 INFO L168 Benchmark]: TraceAbstraction took 1702.54 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 58.0 MB in the beginning and 84.7 MB in the end (delta: -26.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:41:16,909 INFO L168 Benchmark]: Witness Printer took 80.38 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 81.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:41:16,911 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 102.8 MB. Free memory was 74.3 MB in the beginning and 74.3 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.22 ms. Allocated memory is still 102.8 MB. Free memory was 68.5 MB in the beginning and 78.9 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.90 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.39 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 444.87 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 58.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1702.54 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 58.0 MB in the beginning and 84.7 MB in the end (delta: -26.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 80.38 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 81.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; VAL [ldv_mutex=1, open_called=0] [L76] int ldv_s_misc_fops_file_operations = 0; [L71] open_called = 0 [L72] return 0; VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: VAL [ldv_mutex=1, open_called=0] [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; VAL [ldv_mutex=1, open_called=0] [L85] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: VAL [ldv_mutex=1, open_called=0] [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L54] return 0; VAL [ldv_mutex=1, open_called=0] [L93] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: VAL [ldv_mutex=1, open_called=0] [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L50] return 0; VAL [ldv_mutex=1, open_called=0] [L101] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [ldv_mutex=1, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L36] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 VAL [ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=2, open_called=0] [L3] __assert_fail("0", "stateful_check.c", 3, "reach_error") VAL [ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 51 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 246 SDtfs, 153 SDslu, 237 SDs, 0 SdLazy, 85 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 66 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3971 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 11/17 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...