./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memset2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/ldv-memsafety/memset2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G 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 32bit --witnessprinter.graph.data.programhash 89c40e0e226fdcfbda8631272bf2c238348d58a6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 20:13:28,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:13:28,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:13:28,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:13:28,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:13:28,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:13:28,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:13:28,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:13:28,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:13:28,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:13:28,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:13:28,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:13:28,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:13:28,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:13:28,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:13:28,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:13:28,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:13:28,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:13:28,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:13:28,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:13:28,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:13:28,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:13:28,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:13:28,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:13:28,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:13:28,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:13:28,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:13:28,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:13:28,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:13:28,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:13:28,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:13:28,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:13:28,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:13:28,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:13:28,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:13:28,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:13:28,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:13:28,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:13:28,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:13:28,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:13:28,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:13:28,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-28 20:13:28,710 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:13:28,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:13:28,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:13:28,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:13:28,714 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:13:28,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:13:28,715 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 20:13:28,715 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:13:28,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:13:28,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 20:13:28,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:13:28,717 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 20:13:28,717 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 20:13:28,718 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 20:13:28,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:13:28,718 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 20:13:28,719 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 20:13:28,719 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:13:28,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:13:28,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:13:28,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:13:28,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:13:28,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:13:28,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:13:28,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:13:28,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:13:28,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:13:28,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:13:28,722 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89c40e0e226fdcfbda8631272bf2c238348d58a6 [2019-11-28 20:13:29,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:13:29,057 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:13:29,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:13:29,065 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:13:29,065 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:13:29,066 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memset2.c [2019-11-28 20:13:29,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a621b5d/e9dfcb40280249cfabe4f2fef00ef400/FLAG08daa96a9 [2019-11-28 20:13:29,607 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:13:29,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memset2.c [2019-11-28 20:13:29,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a621b5d/e9dfcb40280249cfabe4f2fef00ef400/FLAG08daa96a9 [2019-11-28 20:13:29,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a621b5d/e9dfcb40280249cfabe4f2fef00ef400 [2019-11-28 20:13:29,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:13:29,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 20:13:29,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:13:29,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:13:29,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:13:29,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:13:29" (1/1) ... [2019-11-28 20:13:29,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad782af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:29, skipping insertion in model container [2019-11-28 20:13:29,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:13:29" (1/1) ... [2019-11-28 20:13:30,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:13:30,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:13:30,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:13:30,217 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:13:30,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:13:30,252 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:13:30,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30 WrapperNode [2019-11-28 20:13:30,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:13:30,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:13:30,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:13:30,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:13:30,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (1/1) ... [2019-11-28 20:13:30,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (1/1) ... [2019-11-28 20:13:30,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (1/1) ... [2019-11-28 20:13:30,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (1/1) ... [2019-11-28 20:13:30,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (1/1) ... [2019-11-28 20:13:30,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (1/1) ... [2019-11-28 20:13:30,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (1/1) ... [2019-11-28 20:13:30,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:13:30,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:13:30,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:13:30,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:13:30,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (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 20:13:30,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 20:13:30,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:13:30,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 20:13:30,395 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-28 20:13:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-28 20:13:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 20:13:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 20:13:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-28 20:13:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 20:13:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 20:13:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:13:30,519 WARN L738 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-28 20:13:30,573 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:13:30,573 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-28 20:13:30,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:13:30 BoogieIcfgContainer [2019-11-28 20:13:30,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:13:30,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:13:30,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:13:30,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:13:30,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:13:29" (1/3) ... [2019-11-28 20:13:30,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b6286e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:13:30, skipping insertion in model container [2019-11-28 20:13:30,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:13:30" (2/3) ... [2019-11-28 20:13:30,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b6286e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:13:30, skipping insertion in model container [2019-11-28 20:13:30,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:13:30" (3/3) ... [2019-11-28 20:13:30,584 INFO L109 eAbstractionObserver]: Analyzing ICFG memset2.c [2019-11-28 20:13:30,596 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:13:30,604 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-28 20:13:30,618 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-28 20:13:30,646 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:13:30,647 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 20:13:30,647 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:13:30,648 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:13:30,648 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:13:30,648 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:13:30,648 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:13:30,649 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:13:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-28 20:13:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 20:13:30,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:13:30,691 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:13:30,691 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:13:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:13:30,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2019-11-28 20:13:30,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:13:30,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495426520] [2019-11-28 20:13:30,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:13:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:30,921 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 20:13:30,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495426520] [2019-11-28 20:13:30,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:13:30,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:13:30,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867030166] [2019-11-28 20:13:30,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:13:30,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:13:30,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:13:30,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:13:30,946 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2019-11-28 20:13:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:13:31,051 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-28 20:13:31,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:13:31,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-28 20:13:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:13:31,062 INFO L225 Difference]: With dead ends: 19 [2019-11-28 20:13:31,063 INFO L226 Difference]: Without dead ends: 16 [2019-11-28 20:13:31,065 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 20:13:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-28 20:13:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-28 20:13:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 20:13:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-28 20:13:31,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2019-11-28 20:13:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:13:31,099 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-28 20:13:31,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:13:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-28 20:13:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 20:13:31,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:13:31,100 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:13:31,100 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:13:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:13:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2019-11-28 20:13:31,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:13:31,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135760355] [2019-11-28 20:13:31,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:13:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,176 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 20:13:31,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135760355] [2019-11-28 20:13:31,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:13:31,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:13:31,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750187152] [2019-11-28 20:13:31,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:13:31,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:13:31,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:13:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:13:31,181 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2019-11-28 20:13:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:13:31,230 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-28 20:13:31,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:13:31,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-28 20:13:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:13:31,232 INFO L225 Difference]: With dead ends: 15 [2019-11-28 20:13:31,232 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 20:13:31,233 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 20:13:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 20:13:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 20:13:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 20:13:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-28 20:13:31,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2019-11-28 20:13:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:13:31,240 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-28 20:13:31,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:13:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-28 20:13:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 20:13:31,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:13:31,241 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:13:31,241 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:13:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:13:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2019-11-28 20:13:31,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:13:31,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768884285] [2019-11-28 20:13:31,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:13:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,357 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 20:13:31,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768884285] [2019-11-28 20:13:31,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:13:31,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 20:13:31,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212001268] [2019-11-28 20:13:31,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 20:13:31,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:13:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:13:31,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:13:31,360 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2019-11-28 20:13:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:13:31,462 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-28 20:13:31,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 20:13:31,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-28 20:13:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:13:31,464 INFO L225 Difference]: With dead ends: 18 [2019-11-28 20:13:31,465 INFO L226 Difference]: Without dead ends: 16 [2019-11-28 20:13:31,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 20:13:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-28 20:13:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-28 20:13:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 20:13:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-28 20:13:31,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-11-28 20:13:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:13:31,474 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-28 20:13:31,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 20:13:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-28 20:13:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 20:13:31,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:13:31,476 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:13:31,476 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:13:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:13:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1971150090, now seen corresponding path program 1 times [2019-11-28 20:13:31,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:13:31,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770920778] [2019-11-28 20:13:31,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:13:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:13:31,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770920778] [2019-11-28 20:13:31,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502449180] [2019-11-28 20:13:31,599 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 20:13:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:31,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:13:31,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:13:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:13:31,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:13:31,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-28 20:13:31,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725619048] [2019-11-28 20:13:31,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:13:31,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:13:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:13:31,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 20:13:31,717 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2019-11-28 20:13:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:13:31,833 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-28 20:13:31,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:13:31,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-28 20:13:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:13:31,836 INFO L225 Difference]: With dead ends: 19 [2019-11-28 20:13:31,836 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 20:13:31,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-28 20:13:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 20:13:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 20:13:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 20:13:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-28 20:13:31,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-11-28 20:13:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:13:31,841 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-28 20:13:31,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:13:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-28 20:13:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 20:13:31,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:13:31,843 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:13:32,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:13:32,049 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 20:13:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:13:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 2 times [2019-11-28 20:13:32,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:13:32,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527828500] [2019-11-28 20:13:32,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:13:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:13:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:13:32,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527828500] [2019-11-28 20:13:32,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110604228] [2019-11-28 20:13:32,190 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 20:13:32,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-28 20:13:32,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 20:13:32,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 20:13:32,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:13:32,349 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2019-11-28 20:13:32,351 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 20:13:32,355 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 20:13:32,357 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-28 20:13:32,357 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2019-11-28 20:13:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 20:13:32,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 20:13:32,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2019-11-28 20:13:32,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673829237] [2019-11-28 20:13:32,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 20:13:32,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:13:32,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 20:13:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-28 20:13:32,453 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2019-11-28 20:13:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:13:32,536 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-28 20:13:32,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 20:13:32,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-28 20:13:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:13:32,538 INFO L225 Difference]: With dead ends: 16 [2019-11-28 20:13:32,538 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 20:13:32,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-28 20:13:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 20:13:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 20:13:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 20:13:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 20:13:32,539 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-11-28 20:13:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:13:32,540 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:13:32,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 20:13:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:13:32,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 20:13:32,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:13:32,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:13:32 BoogieIcfgContainer [2019-11-28 20:13:32,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:13:32,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:13:32,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:13:32,757 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:13:32,758 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:13:30" (3/4) ... [2019-11-28 20:13:32,762 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 20:13:32,768 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-28 20:13:32,768 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2019-11-28 20:13:32,769 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-28 20:13:32,774 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-11-28 20:13:32,774 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-28 20:13:32,774 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 20:13:32,775 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 20:13:32,810 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:13:32,810 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:13:32,812 INFO L168 Benchmark]: Toolchain (without parser) took 2826.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 960.4 MB in the beginning and 981.0 MB in the end (delta: -20.6 MB). Peak memory consumption was 118.3 MB. Max. memory is 11.5 GB. [2019-11-28 20:13:32,813 INFO L168 Benchmark]: CDTParser took 0.29 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 20:13:32,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:13:32,814 INFO L168 Benchmark]: Boogie Preprocessor took 84.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:13:32,815 INFO L168 Benchmark]: RCFGBuilder took 235.93 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-28 20:13:32,816 INFO L168 Benchmark]: TraceAbstraction took 2176.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 987.6 MB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 11.5 GB. [2019-11-28 20:13:32,817 INFO L168 Benchmark]: Witness Printer took 57.76 ms. Allocated memory is still 1.2 GB. Free memory was 987.6 MB in the beginning and 981.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:13:32,821 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 267.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 84.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 235.93 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2176.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 987.6 MB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 11.5 GB. * Witness Printer took 57.76 ms. Allocated memory is still 1.2 GB. Free memory was 987.6 MB in the beginning and 981.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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 - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 3 error locations. Result: SAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 34 SDslu, 65 SDs, 0 SdLazy, 123 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 90 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 83 ConstructedInterpolants, 8 QuantifiedInterpolants, 3158 SizeOfPredicates, 1 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 3/8 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...