./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b9dfe2826dbd43b76a93fbf593c8a07947a4c894 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:19:32,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:19:32,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:19:32,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:19:32,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:19:32,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:19:32,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:19:32,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:19:32,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:19:32,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:19:32,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:19:32,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:19:32,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:19:32,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:19:32,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:19:32,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:19:32,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:19:32,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:19:32,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:19:32,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:19:32,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:19:32,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:19:32,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:19:32,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:19:32,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:19:32,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:19:32,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:19:32,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:19:32,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:19:32,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:19:32,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:19:32,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:19:32,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:19:32,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:19:32,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:19:32,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:19:32,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:19:32,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:19:32,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:19:32,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:19:32,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:19:32,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2019-11-28 20:19:33,001 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:19:33,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:19:33,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:19:33,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:19:33,007 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:19:33,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:19:33,007 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:19:33,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:19:33,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:19:33,008 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 20:19:33,009 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 20:19:33,009 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 20:19:33,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:19:33,010 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 20:19:33,010 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:19:33,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:19:33,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:19:33,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:19:33,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:19:33,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:19:33,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:19:33,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:19:33,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:19:33,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:19:33,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:19:33,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9dfe2826dbd43b76a93fbf593c8a07947a4c894 [2019-11-28 20:19:33,322 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:19:33,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:19:33,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:19:33,348 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:19:33,348 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:19:33,349 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2019-11-28 20:19:33,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969ce148/0223de1ac19b465b8c8d58b2c57dc789/FLAGb693d0788 [2019-11-28 20:19:33,871 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:19:33,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2019-11-28 20:19:33,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969ce148/0223de1ac19b465b8c8d58b2c57dc789/FLAGb693d0788 [2019-11-28 20:19:34,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969ce148/0223de1ac19b465b8c8d58b2c57dc789 [2019-11-28 20:19:34,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:19:34,276 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 20:19:34,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:19:34,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:19:34,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:19:34,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec60d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34, skipping insertion in model container [2019-11-28 20:19:34,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:19:34,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:19:34,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:19:34,559 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:19:34,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:19:34,597 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:19:34,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34 WrapperNode [2019-11-28 20:19:34,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:19:34,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:19:34,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:19:34,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:19:34,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (1/1) ... [2019-11-28 20:19:34,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:19:34,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:19:34,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:19:34,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:19:34,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (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 [2019-11-28 20:19:34,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 20:19:34,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:19:34,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 20:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-28 20:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 20:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 20:19:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 20:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 20:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 20:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 20:19:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:19:35,059 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:19:35,060 INFO L287 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-28 20:19:35,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:35 BoogieIcfgContainer [2019-11-28 20:19:35,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:19:35,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:19:35,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:19:35,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:19:35,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:19:34" (1/3) ... [2019-11-28 20:19:35,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4600c558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:19:35, skipping insertion in model container [2019-11-28 20:19:35,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:34" (2/3) ... [2019-11-28 20:19:35,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4600c558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:19:35, skipping insertion in model container [2019-11-28 20:19:35,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:35" (3/3) ... [2019-11-28 20:19:35,070 INFO L109 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2019-11-28 20:19:35,080 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:19:35,087 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-11-28 20:19:35,099 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-11-28 20:19:35,119 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:19:35,120 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 20:19:35,120 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:19:35,120 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:19:35,120 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:19:35,120 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:19:35,121 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:19:35,121 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:19:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-28 20:19:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 20:19:35,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:35,146 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:35,147 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:35,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1038673271, now seen corresponding path program 1 times [2019-11-28 20:19:35,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:35,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104432223] [2019-11-28 20:19:35,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:35,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104432223] [2019-11-28 20:19:35,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:35,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:19:35,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832916712] [2019-11-28 20:19:35,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:19:35,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:19:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:35,421 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2019-11-28 20:19:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:35,557 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-28 20:19:35,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:19:35,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-28 20:19:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:35,569 INFO L225 Difference]: With dead ends: 39 [2019-11-28 20:19:35,569 INFO L226 Difference]: Without dead ends: 36 [2019-11-28 20:19:35,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-28 20:19:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-28 20:19:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 20:19:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-28 20:19:35,605 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2019-11-28 20:19:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:35,605 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-28 20:19:35,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:19:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-28 20:19:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 20:19:35,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:35,606 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:35,607 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1038673272, now seen corresponding path program 1 times [2019-11-28 20:19:35,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:35,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740224535] [2019-11-28 20:19:35,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:35,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740224535] [2019-11-28 20:19:35,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:35,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:19:35,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704676198] [2019-11-28 20:19:35,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:19:35,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:19:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:35,690 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2019-11-28 20:19:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:35,792 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-28 20:19:35,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:19:35,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-28 20:19:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:35,794 INFO L225 Difference]: With dead ends: 29 [2019-11-28 20:19:35,794 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 20:19:35,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 20:19:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 20:19:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 20:19:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-28 20:19:35,804 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2019-11-28 20:19:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:35,804 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-28 20:19:35,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:19:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-28 20:19:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 20:19:35,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:35,805 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:35,805 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1416659532, now seen corresponding path program 1 times [2019-11-28 20:19:35,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:35,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756999824] [2019-11-28 20:19:35,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:35,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756999824] [2019-11-28 20:19:35,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502300767] [2019-11-28 20:19:35,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 20:19:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:35,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 20:19:35,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:36,012 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-28 20:19:36,013 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 20:19:36,024 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 20:19:36,024 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-28 20:19:36,025 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-28 20:19:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:36,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:19:36,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2019-11-28 20:19:36,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689321001] [2019-11-28 20:19:36,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:19:36,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:36,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:19:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:19:36,049 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2019-11-28 20:19:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:36,156 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2019-11-28 20:19:36,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 20:19:36,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-28 20:19:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:36,158 INFO L225 Difference]: With dead ends: 35 [2019-11-28 20:19:36,158 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 20:19:36,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:19:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 20:19:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-28 20:19:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 20:19:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-28 20:19:36,165 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 12 [2019-11-28 20:19:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:36,165 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-28 20:19:36,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:19:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-28 20:19:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 20:19:36,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:36,167 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:36,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:36,369 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:36,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:36,370 INFO L82 PathProgramCache]: Analyzing trace with hash -931508081, now seen corresponding path program 2 times [2019-11-28 20:19:36,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:36,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814147138] [2019-11-28 20:19:36,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:36,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814147138] [2019-11-28 20:19:36,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103965243] [2019-11-28 20:19:36,514 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:36,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 20:19:36,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:19:36,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 20:19:36,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:36,565 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-28 20:19:36,566 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 20:19:36,573 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 20:19:36,574 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-28 20:19:36,574 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-28 20:19:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:36,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 20:19:36,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2019-11-28 20:19:36,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215973924] [2019-11-28 20:19:36,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:19:36,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:19:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:19:36,646 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 6 states. [2019-11-28 20:19:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:36,692 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-11-28 20:19:36,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:19:36,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-28 20:19:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:36,693 INFO L225 Difference]: With dead ends: 34 [2019-11-28 20:19:36,694 INFO L226 Difference]: Without dead ends: 34 [2019-11-28 20:19:36,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:19:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-28 20:19:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-11-28 20:19:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 20:19:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-28 20:19:36,699 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2019-11-28 20:19:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:36,699 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-28 20:19:36,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:19:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-28 20:19:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 20:19:36,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:36,701 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:36,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:36,909 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1826117314, now seen corresponding path program 1 times [2019-11-28 20:19:36,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:36,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601298167] [2019-11-28 20:19:36,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:36,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601298167] [2019-11-28 20:19:36,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086316664] [2019-11-28 20:19:36,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:37,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:19:37,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:37,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:19:37,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-28 20:19:37,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928852257] [2019-11-28 20:19:37,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 20:19:37,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:37,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 20:19:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 20:19:37,072 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2019-11-28 20:19:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:37,148 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-28 20:19:37,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:19:37,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-28 20:19:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:37,150 INFO L225 Difference]: With dead ends: 38 [2019-11-28 20:19:37,150 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 20:19:37,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 20:19:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 20:19:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-28 20:19:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 20:19:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-28 20:19:37,155 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 18 [2019-11-28 20:19:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:37,156 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-28 20:19:37,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 20:19:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-28 20:19:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 20:19:37,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:37,157 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:37,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:37,361 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:37,362 INFO L82 PathProgramCache]: Analyzing trace with hash 945846593, now seen corresponding path program 2 times [2019-11-28 20:19:37,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:37,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470845693] [2019-11-28 20:19:37,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:37,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470845693] [2019-11-28 20:19:37,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428164340] [2019-11-28 20:19:37,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:37,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-28 20:19:37,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:19:37,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 20:19:37,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:37,508 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-28 20:19:37,508 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 20:19:37,514 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 20:19:37,515 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-28 20:19:37,515 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-28 20:19:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 20:19:37,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 20:19:37,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2019-11-28 20:19:37,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569667486] [2019-11-28 20:19:37,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 20:19:37,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 20:19:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:19:37,540 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 3 states. [2019-11-28 20:19:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:37,572 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-11-28 20:19:37,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 20:19:37,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-28 20:19:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:37,574 INFO L225 Difference]: With dead ends: 46 [2019-11-28 20:19:37,575 INFO L226 Difference]: Without dead ends: 46 [2019-11-28 20:19:37,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:19:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-28 20:19:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-11-28 20:19:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-28 20:19:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-11-28 20:19:37,581 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 22 [2019-11-28 20:19:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:37,581 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-11-28 20:19:37,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 20:19:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-11-28 20:19:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-28 20:19:37,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:37,583 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:37,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:37,794 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1574303516, now seen corresponding path program 1 times [2019-11-28 20:19:37,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:37,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052821591] [2019-11-28 20:19:37,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 20:19:37,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052821591] [2019-11-28 20:19:37,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:37,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 20:19:37,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163671443] [2019-11-28 20:19:37,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:19:37,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:37,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:19:37,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:19:37,858 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 5 states. [2019-11-28 20:19:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:37,944 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-11-28 20:19:37,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:19:37,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-28 20:19:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:37,946 INFO L225 Difference]: With dead ends: 48 [2019-11-28 20:19:37,946 INFO L226 Difference]: Without dead ends: 48 [2019-11-28 20:19:37,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:19:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-28 20:19:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-11-28 20:19:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-28 20:19:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2019-11-28 20:19:37,952 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2019-11-28 20:19:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:37,953 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2019-11-28 20:19:37,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:19:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2019-11-28 20:19:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-28 20:19:37,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:37,954 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:37,954 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1258071097, now seen corresponding path program 1 times [2019-11-28 20:19:37,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:37,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571618981] [2019-11-28 20:19:37,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:38,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571618981] [2019-11-28 20:19:38,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489127719] [2019-11-28 20:19:38,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:38,070 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:19:38,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:38,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:19:38,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-28 20:19:38,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473153294] [2019-11-28 20:19:38,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 20:19:38,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 20:19:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:19:38,113 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 8 states. [2019-11-28 20:19:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:38,191 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-11-28 20:19:38,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 20:19:38,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-28 20:19:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:38,193 INFO L225 Difference]: With dead ends: 52 [2019-11-28 20:19:38,193 INFO L226 Difference]: Without dead ends: 52 [2019-11-28 20:19:38,194 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-28 20:19:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-28 20:19:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-28 20:19:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-28 20:19:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2019-11-28 20:19:38,206 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 26 [2019-11-28 20:19:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:38,206 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2019-11-28 20:19:38,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 20:19:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2019-11-28 20:19:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-28 20:19:38,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:38,208 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:38,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:38,412 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash -113674038, now seen corresponding path program 2 times [2019-11-28 20:19:38,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:38,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555329584] [2019-11-28 20:19:38,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:38,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555329584] [2019-11-28 20:19:38,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080766765] [2019-11-28 20:19:38,500 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:38,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-28 20:19:38,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:19:38,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 20:19:38,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 20:19:38,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 20:19:38,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2019-11-28 20:19:38,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848420623] [2019-11-28 20:19:38,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:19:38,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:38,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:19:38,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:19:38,596 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2019-11-28 20:19:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:38,693 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2019-11-28 20:19:38,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 20:19:38,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-28 20:19:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:38,694 INFO L225 Difference]: With dead ends: 48 [2019-11-28 20:19:38,694 INFO L226 Difference]: Without dead ends: 46 [2019-11-28 20:19:38,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:19:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-28 20:19:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-28 20:19:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-28 20:19:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-28 20:19:38,700 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 30 [2019-11-28 20:19:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:38,700 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-28 20:19:38,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:19:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-28 20:19:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-28 20:19:38,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:38,702 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:38,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:38,906 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1865200645, now seen corresponding path program 1 times [2019-11-28 20:19:38,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:38,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94102761] [2019-11-28 20:19:38,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 20:19:38,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94102761] [2019-11-28 20:19:38,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140383487] [2019-11-28 20:19:38,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:39,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 20:19:39,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 20:19:39,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:19:39,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-28 20:19:39,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721467195] [2019-11-28 20:19:39,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 20:19:39,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 20:19:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-28 20:19:39,064 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2019-11-28 20:19:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:39,142 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2019-11-28 20:19:39,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 20:19:39,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-28 20:19:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:39,143 INFO L225 Difference]: With dead ends: 53 [2019-11-28 20:19:39,143 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 20:19:39,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-28 20:19:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 20:19:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-28 20:19:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-28 20:19:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-28 20:19:39,148 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2019-11-28 20:19:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:39,148 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-28 20:19:39,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 20:19:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-28 20:19:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-28 20:19:39,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:39,149 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:39,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:39,354 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash 133323454, now seen corresponding path program 2 times [2019-11-28 20:19:39,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:39,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132259226] [2019-11-28 20:19:39,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 20:19:39,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132259226] [2019-11-28 20:19:39,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596243850] [2019-11-28 20:19:39,447 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:39,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 20:19:39,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:19:39,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 20:19:39,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 20:19:39,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:19:39,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-28 20:19:39,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940972545] [2019-11-28 20:19:39,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 20:19:39,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 20:19:39,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:19:39,504 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2019-11-28 20:19:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:39,573 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2019-11-28 20:19:39,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 20:19:39,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2019-11-28 20:19:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:39,575 INFO L225 Difference]: With dead ends: 57 [2019-11-28 20:19:39,575 INFO L226 Difference]: Without dead ends: 57 [2019-11-28 20:19:39,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-28 20:19:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-28 20:19:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-28 20:19:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-28 20:19:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-28 20:19:39,580 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 36 [2019-11-28 20:19:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:39,581 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-28 20:19:39,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 20:19:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-28 20:19:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-28 20:19:39,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:39,586 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:39,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:39,787 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-28 20:19:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1483321343, now seen corresponding path program 3 times [2019-11-28 20:19:39,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:39,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926328668] [2019-11-28 20:19:39,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 20:19:39,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926328668] [2019-11-28 20:19:39,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725916698] [2019-11-28 20:19:39,882 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:39,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-28 20:19:39,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:19:39,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 20:19:39,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:19:39,933 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-28 20:19:39,933 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 20:19:39,940 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 20:19:39,941 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-28 20:19:39,941 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-28 20:19:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-28 20:19:40,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 20:19:40,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-11-28 20:19:40,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153656462] [2019-11-28 20:19:40,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:19:40,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:40,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:19:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-11-28 20:19:40,046 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 6 states. [2019-11-28 20:19:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:40,138 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-28 20:19:40,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 20:19:40,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2019-11-28 20:19:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:40,139 INFO L225 Difference]: With dead ends: 54 [2019-11-28 20:19:40,139 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 20:19:40,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-28 20:19:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 20:19:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 20:19:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 20:19:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 20:19:40,140 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2019-11-28 20:19:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:40,141 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:19:40,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:19:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:19:40,141 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 20:19:40,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:19:40,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:19:40 BoogieIcfgContainer [2019-11-28 20:19:40,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:19:40,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:19:40,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:19:40,350 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:19:40,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:35" (3/4) ... [2019-11-28 20:19:40,354 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 20:19:40,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-28 20:19:40,362 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-28 20:19:40,366 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-11-28 20:19:40,366 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-28 20:19:40,367 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-28 20:19:40,367 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-28 20:19:40,427 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:19:40,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:19:40,432 INFO L168 Benchmark]: Toolchain (without parser) took 6152.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.7 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -119.5 MB). Peak memory consumption was 90.2 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:40,435 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:19:40,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.25 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:40,438 INFO L168 Benchmark]: Boogie Preprocessor took 91.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -187.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:40,439 INFO L168 Benchmark]: RCFGBuilder took 370.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:40,440 INFO L168 Benchmark]: TraceAbstraction took 5286.84 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.2 MB). Peak memory consumption was 92.0 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:40,440 INFO L168 Benchmark]: Witness Printer took 77.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:40,445 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 319.25 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 91.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -187.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 370.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5286.84 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.2 MB). Peak memory consumption was 92.0 MB. Max. memory is 11.5 GB. * Witness Printer took 77.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 9 error locations. Result: SAFE, OverallTime: 5.2s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 159 SDslu, 585 SDs, 0 SdLazy, 555 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 312 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=11, 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, 12 MinimizatonAttempts, 24 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 504 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 483 ConstructedInterpolants, 1 QuantifiedInterpolants, 58570 SizeOfPredicates, 5 NumberOfNonLiveVariables, 661 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 150/459 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...