./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/scopes3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30f4e4ab 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/memsafety-ext3/scopes3.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 7efcb16e512d7de15a71f6cd895dcd8493c4b646 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 02:46:40,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 02:46:40,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 02:46:40,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 02:46:40,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 02:46:40,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 02:46:40,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 02:46:40,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 02:46:40,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 02:46:40,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 02:46:40,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 02:46:40,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 02:46:40,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 02:46:40,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 02:46:40,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 02:46:40,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 02:46:40,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 02:46:40,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 02:46:40,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 02:46:40,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 02:46:40,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 02:46:40,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 02:46:40,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 02:46:40,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 02:46:40,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 02:46:40,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 02:46:40,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 02:46:40,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 02:46:40,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 02:46:40,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 02:46:40,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 02:46:40,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 02:46:40,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 02:46:40,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 02:46:40,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 02:46:40,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 02:46:40,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 02:46:40,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 02:46:40,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 02:46:40,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 02:46:40,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 02:46:40,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-28 02:46:40,946 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 02:46:40,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 02:46:40,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 02:46:40,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 02:46:40,950 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 02:46:40,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 02:46:40,950 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 02:46:40,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 02:46:40,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 02:46:40,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 02:46:40,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 02:46:40,953 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 02:46:40,953 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 02:46:40,953 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 02:46:40,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 02:46:40,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 02:46:40,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 02:46:40,955 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 02:46:40,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 02:46:40,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 02:46:40,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 02:46:40,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 02:46:40,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 02:46:40,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 02:46:40,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 02:46:40,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 02:46:40,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 02:46:40,957 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 -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2019-11-28 02:46:41,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 02:46:41,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 02:46:41,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 02:46:41,307 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 02:46:41,308 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 02:46:41,309 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes3.c [2019-11-28 02:46:41,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23340cca/a0cf3798486e486ebec945dffd6d7137/FLAG55245c532 [2019-11-28 02:46:41,910 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 02:46:41,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes3.c [2019-11-28 02:46:41,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23340cca/a0cf3798486e486ebec945dffd6d7137/FLAG55245c532 [2019-11-28 02:46:42,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23340cca/a0cf3798486e486ebec945dffd6d7137 [2019-11-28 02:46:42,335 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 02:46:42,337 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 02:46:42,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 02:46:42,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 02:46:42,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 02:46:42,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5f17e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42, skipping insertion in model container [2019-11-28 02:46:42,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 02:46:42,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 02:46:42,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:46:42,568 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 02:46:42,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:46:42,599 INFO L208 MainTranslator]: Completed translation [2019-11-28 02:46:42,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42 WrapperNode [2019-11-28 02:46:42,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 02:46:42,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 02:46:42,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 02:46:42,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 02:46:42,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (1/1) ... [2019-11-28 02:46:42,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 02:46:42,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 02:46:42,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 02:46:42,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 02:46:42,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (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 02:46:42,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 02:46:42,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 02:46:42,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 02:46:42,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 02:46:42,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 02:46:42,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 02:46:42,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 02:46:42,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 02:46:42,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 02:46:42,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 02:46:42,952 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 02:46:42,953 INFO L297 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-28 02:46:42,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:46:42 BoogieIcfgContainer [2019-11-28 02:46:42,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 02:46:42,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 02:46:42,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 02:46:42,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 02:46:42,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:46:42" (1/3) ... [2019-11-28 02:46:42,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cedc69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:46:42, skipping insertion in model container [2019-11-28 02:46:42,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:46:42" (2/3) ... [2019-11-28 02:46:42,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cedc69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:46:42, skipping insertion in model container [2019-11-28 02:46:42,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:46:42" (3/3) ... [2019-11-28 02:46:42,968 INFO L109 eAbstractionObserver]: Analyzing ICFG scopes3.c [2019-11-28 02:46:42,979 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 02:46:42,989 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-28 02:46:43,006 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-28 02:46:43,031 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 02:46:43,032 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 02:46:43,032 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 02:46:43,033 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 02:46:43,033 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 02:46:43,033 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 02:46:43,033 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 02:46:43,034 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 02:46:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-28 02:46:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 02:46:43,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:43,067 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:43,068 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2019-11-28 02:46:43,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:43,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933220739] [2019-11-28 02:46:43,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,266 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 02:46:43,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933220739] [2019-11-28 02:46:43,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:46:43,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 02:46:43,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979043876] [2019-11-28 02:46:43,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 02:46:43,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:43,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 02:46:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 02:46:43,297 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-28 02:46:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:43,394 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-11-28 02:46:43,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 02:46:43,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-28 02:46:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:43,415 INFO L225 Difference]: With dead ends: 26 [2019-11-28 02:46:43,415 INFO L226 Difference]: Without dead ends: 21 [2019-11-28 02:46:43,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 02:46:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-28 02:46:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-28 02:46:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 02:46:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-28 02:46:43,475 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2019-11-28 02:46:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:43,476 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-28 02:46:43,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 02:46:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-28 02:46:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 02:46:43,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:43,480 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:43,481 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:43,482 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2019-11-28 02:46:43,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:43,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574494174] [2019-11-28 02:46:43,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,598 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 02:46:43,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574494174] [2019-11-28 02:46:43,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:46:43,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 02:46:43,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984462275] [2019-11-28 02:46:43,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 02:46:43,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 02:46:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 02:46:43,604 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-11-28 02:46:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:43,680 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-28 02:46:43,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 02:46:43,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-28 02:46:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:43,682 INFO L225 Difference]: With dead ends: 22 [2019-11-28 02:46:43,682 INFO L226 Difference]: Without dead ends: 22 [2019-11-28 02:46:43,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 02:46:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-28 02:46:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2019-11-28 02:46:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 02:46:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-28 02:46:43,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2019-11-28 02:46:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:43,690 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-28 02:46:43,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 02:46:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-28 02:46:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 02:46:43,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:43,692 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:43,692 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2019-11-28 02:46:43,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:43,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041859283] [2019-11-28 02:46:43,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,794 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 02:46:43,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041859283] [2019-11-28 02:46:43,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:46:43,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 02:46:43,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921810381] [2019-11-28 02:46:43,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 02:46:43,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:43,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 02:46:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 02:46:43,796 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2019-11-28 02:46:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:43,846 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-28 02:46:43,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 02:46:43,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-28 02:46:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:43,849 INFO L225 Difference]: With dead ends: 16 [2019-11-28 02:46:43,850 INFO L226 Difference]: Without dead ends: 16 [2019-11-28 02:46:43,850 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 02:46:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-28 02:46:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-28 02:46:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 02:46:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-28 02:46:43,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2019-11-28 02:46:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:43,854 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-28 02:46:43,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 02:46:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-28 02:46:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 02:46:43,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:43,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:43,856 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:43,856 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2019-11-28 02:46:43,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:43,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478219294] [2019-11-28 02:46:43,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:43,901 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 02:46:43,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478219294] [2019-11-28 02:46:43,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:46:43,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 02:46:43,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880295402] [2019-11-28 02:46:43,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 02:46:43,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 02:46:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 02:46:43,904 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2019-11-28 02:46:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:43,933 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-28 02:46:43,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 02:46:43,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-28 02:46:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:43,934 INFO L225 Difference]: With dead ends: 15 [2019-11-28 02:46:43,934 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 02:46:43,935 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 02:46:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 02:46:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 02:46:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 02:46:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-28 02:46:43,938 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2019-11-28 02:46:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:43,939 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-28 02:46:43,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 02:46:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-28 02:46:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 02:46:43,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:43,940 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:43,940 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -440617163, now seen corresponding path program 1 times [2019-11-28 02:46:43,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:43,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704386237] [2019-11-28 02:46:43,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:44,017 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 02:46:44,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704386237] [2019-11-28 02:46:44,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967428255] [2019-11-28 02:46:44,018 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 02:46:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:44,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 02:46:44,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:44,132 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 02:46:44,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:44,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-28 02:46:44,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253330628] [2019-11-28 02:46:44,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 02:46:44,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 02:46:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-28 02:46:44,138 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2019-11-28 02:46:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:44,198 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-28 02:46:44,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 02:46:44,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-28 02:46:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:44,200 INFO L225 Difference]: With dead ends: 20 [2019-11-28 02:46:44,201 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 02:46:44,201 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 02:46:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 02:46:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-28 02:46:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 02:46:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-28 02:46:44,210 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2019-11-28 02:46:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:44,211 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-28 02:46:44,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 02:46:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-28 02:46:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 02:46:44,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:44,213 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:44,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:44,419 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 2 times [2019-11-28 02:46:44,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:44,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967052586] [2019-11-28 02:46:44,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:44,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967052586] [2019-11-28 02:46:44,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395186658] [2019-11-28 02:46:44,493 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 02:46:44,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 02:46:44,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:46:44,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:46:44,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:44,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:44,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-28 02:46:44,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727995920] [2019-11-28 02:46:44,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 02:46:44,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 02:46:44,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 02:46:44,560 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2019-11-28 02:46:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:44,627 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-28 02:46:44,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 02:46:44,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-28 02:46:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:44,629 INFO L225 Difference]: With dead ends: 23 [2019-11-28 02:46:44,629 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 02:46:44,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-28 02:46:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 02:46:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-11-28 02:46:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 02:46:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-28 02:46:44,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2019-11-28 02:46:44,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:44,634 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-28 02:46:44,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 02:46:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-28 02:46:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 02:46:44,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:44,635 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:44,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:44,841 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:44,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1138822869, now seen corresponding path program 3 times [2019-11-28 02:46:44,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:44,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410136482] [2019-11-28 02:46:44,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:44,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410136482] [2019-11-28 02:46:44,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355268364] [2019-11-28 02:46:44,946 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 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 02:46:44,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 02:46:44,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:46:44,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 02:46:45,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:45,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:45,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-28 02:46:45,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209465856] [2019-11-28 02:46:45,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 02:46:45,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:45,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 02:46:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-28 02:46:45,027 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2019-11-28 02:46:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:45,096 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-28 02:46:45,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 02:46:45,097 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-28 02:46:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:45,098 INFO L225 Difference]: With dead ends: 26 [2019-11-28 02:46:45,098 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 02:46:45,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-28 02:46:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 02:46:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-28 02:46:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 02:46:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-28 02:46:45,108 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2019-11-28 02:46:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:45,108 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-28 02:46:45,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 02:46:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-28 02:46:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-28 02:46:45,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:45,110 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:45,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:45,321 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash 727015860, now seen corresponding path program 4 times [2019-11-28 02:46:45,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:45,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489265805] [2019-11-28 02:46:45,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:45,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489265805] [2019-11-28 02:46:45,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928622826] [2019-11-28 02:46:45,412 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 02:46:45,455 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 02:46:45,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:46:45,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 02:46:45,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:45,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:45,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-28 02:46:45,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746523340] [2019-11-28 02:46:45,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 02:46:45,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 02:46:45,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-28 02:46:45,498 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2019-11-28 02:46:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:45,570 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-28 02:46:45,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 02:46:45,571 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-28 02:46:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:45,572 INFO L225 Difference]: With dead ends: 29 [2019-11-28 02:46:45,572 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 02:46:45,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-11-28 02:46:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 02:46:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-28 02:46:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 02:46:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-28 02:46:45,577 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2019-11-28 02:46:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:45,579 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-28 02:46:45,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 02:46:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-28 02:46:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 02:46:45,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:45,582 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:45,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:45,786 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash -988991883, now seen corresponding path program 5 times [2019-11-28 02:46:45,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:45,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956979568] [2019-11-28 02:46:45,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:45,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956979568] [2019-11-28 02:46:45,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081686859] [2019-11-28 02:46:45,922 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 02:46:45,986 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 02:46:45,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:46:45,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 02:46:45,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:46,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:46,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-28 02:46:46,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582851486] [2019-11-28 02:46:46,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 02:46:46,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:46,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 02:46:46,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-28 02:46:46,009 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2019-11-28 02:46:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:46,074 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-28 02:46:46,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 02:46:46,075 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-28 02:46:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:46,076 INFO L225 Difference]: With dead ends: 32 [2019-11-28 02:46:46,076 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 02:46:46,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2019-11-28 02:46:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 02:46:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-28 02:46:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 02:46:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-28 02:46:46,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2019-11-28 02:46:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:46,081 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-28 02:46:46,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 02:46:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-28 02:46:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-28 02:46:46,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:46,083 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:46,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:46,284 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 6 times [2019-11-28 02:46:46,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:46,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002598939] [2019-11-28 02:46:46,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:46,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002598939] [2019-11-28 02:46:46,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106593312] [2019-11-28 02:46:46,413 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 02:46:46,476 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 02:46:46,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:46:46,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 02:46:46,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:46,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:46,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 02:46:46,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956734864] [2019-11-28 02:46:46,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 02:46:46,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:46,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 02:46:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-28 02:46:46,505 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2019-11-28 02:46:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:46,582 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-11-28 02:46:46,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 02:46:46,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-11-28 02:46:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:46,583 INFO L225 Difference]: With dead ends: 35 [2019-11-28 02:46:46,583 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 02:46:46,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2019-11-28 02:46:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 02:46:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-28 02:46:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 02:46:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-28 02:46:46,588 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2019-11-28 02:46:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:46,588 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-28 02:46:46,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 02:46:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-28 02:46:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-28 02:46:46,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:46,589 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:46,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:46,794 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1505028587, now seen corresponding path program 7 times [2019-11-28 02:46:46,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:46,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831947652] [2019-11-28 02:46:46,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:46,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831947652] [2019-11-28 02:46:46,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157501778] [2019-11-28 02:46:46,924 INFO L92 rtionOrderModulation]: Changing assertion order to 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 02:46:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:46,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 02:46:46,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:47,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:47,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-28 02:46:47,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046808695] [2019-11-28 02:46:47,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 02:46:47,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:47,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 02:46:47,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-28 02:46:47,018 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 12 states. [2019-11-28 02:46:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:47,107 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-28 02:46:47,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 02:46:47,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2019-11-28 02:46:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:47,109 INFO L225 Difference]: With dead ends: 38 [2019-11-28 02:46:47,109 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 02:46:47,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2019-11-28 02:46:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 02:46:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-11-28 02:46:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-28 02:46:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-11-28 02:46:47,115 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2019-11-28 02:46:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:47,115 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-11-28 02:46:47,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 02:46:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-11-28 02:46:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-28 02:46:47,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:47,117 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:47,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:47,327 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1141435788, now seen corresponding path program 8 times [2019-11-28 02:46:47,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:47,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246393179] [2019-11-28 02:46:47,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:47,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246393179] [2019-11-28 02:46:47,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715340514] [2019-11-28 02:46:47,486 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 02:46:47,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 02:46:47,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:46:47,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 02:46:47,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:47,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:47,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 02:46:47,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762349003] [2019-11-28 02:46:47,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 02:46:47,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 02:46:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-28 02:46:47,609 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2019-11-28 02:46:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:47,684 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-28 02:46:47,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 02:46:47,685 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-11-28 02:46:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:47,686 INFO L225 Difference]: With dead ends: 41 [2019-11-28 02:46:47,686 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 02:46:47,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-11-28 02:46:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 02:46:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-28 02:46:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 02:46:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-28 02:46:47,691 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2019-11-28 02:46:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:47,692 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-28 02:46:47,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 02:46:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-28 02:46:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 02:46:47,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:47,693 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:47,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:47,898 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1255881291, now seen corresponding path program 9 times [2019-11-28 02:46:47,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:47,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350757409] [2019-11-28 02:46:47,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:46:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:48,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350757409] [2019-11-28 02:46:48,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309712061] [2019-11-28 02:46:48,036 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 02:46:48,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 02:46:48,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 02:46:48,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 02:46:48,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:46:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:46:48,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:46:48,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-28 02:46:48,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952023038] [2019-11-28 02:46:48,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 02:46:48,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:46:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 02:46:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-28 02:46:48,160 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 14 states. [2019-11-28 02:46:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:46:48,239 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-28 02:46:48,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 02:46:48,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-28 02:46:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:46:48,240 INFO L225 Difference]: With dead ends: 42 [2019-11-28 02:46:48,240 INFO L226 Difference]: Without dead ends: 42 [2019-11-28 02:46:48,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2019-11-28 02:46:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-28 02:46:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-28 02:46:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-28 02:46:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-11-28 02:46:48,245 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2019-11-28 02:46:48,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:46:48,245 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-11-28 02:46:48,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 02:46:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-11-28 02:46:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-28 02:46:48,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:46:48,246 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:46:48,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:46:48,451 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-28 02:46:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:46:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 10 times [2019-11-28 02:46:48,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:46:48,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659538721] [2019-11-28 02:46:48,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:46:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:46:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:46:48,587 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:46:48,587 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 02:46:48,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:46:48 BoogieIcfgContainer [2019-11-28 02:46:48,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 02:46:48,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 02:46:48,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 02:46:48,633 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 02:46:48,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:46:42" (3/4) ... [2019-11-28 02:46:48,637 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 02:46:48,704 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 02:46:48,704 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 02:46:48,707 INFO L168 Benchmark]: Toolchain (without parser) took 6369.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 956.3 MB in the beginning and 1.1 GB in the end (delta: -114.2 MB). Peak memory consumption was 62.5 MB. Max. memory is 11.5 GB. [2019-11-28 02:46:48,707 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:46:48,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.36 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:46:48,709 INFO L168 Benchmark]: Boogie Preprocessor took 92.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.6 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -143.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:46:48,710 INFO L168 Benchmark]: RCFGBuilder took 261.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2019-11-28 02:46:48,710 INFO L168 Benchmark]: TraceAbstraction took 5675.36 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.5 MB). Peak memory consumption was 82.5 MB. Max. memory is 11.5 GB. [2019-11-28 02:46:48,711 INFO L168 Benchmark]: Witness Printer took 71.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:46:48,714 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 259.36 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 92.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.6 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -143.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 261.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5675.36 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.5 MB). Peak memory consumption was 82.5 MB. Max. memory is 11.5 GB. * Witness Printer took 71.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=0, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=0, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={4:0}, i=1, p={4:0}] [L6] p[0] = 1 VAL [a={4:0}, i=1, p={4:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={5:0}, i=2, p={5:0}] [L6] p[0] = 1 VAL [a={5:0}, i=2, p={5:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={6:0}, i=3, p={6:0}] [L6] p[0] = 1 VAL [a={6:0}, i=3, p={6:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={7:0}, i=4, p={7:0}] [L6] p[0] = 1 VAL [a={7:0}, i=4, p={7:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={8:0}, i=5, p={8:0}] [L6] p[0] = 1 VAL [a={8:0}, i=5, p={8:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={9:0}, i=6, p={9:0}] [L6] p[0] = 1 VAL [a={9:0}, i=6, p={9:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={10:0}, i=7, p={10:0}] [L6] p[0] = 1 VAL [a={10:0}, i=7, p={10:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={11:0}, i=8, p={11:0}] [L6] p[0] = 1 VAL [a={11:0}, i=8, p={11:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={2:0}, i=9, p={2:0}] [L6] p[0] = 1 VAL [a={2:0}, i=9, p={2:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={2:0}] [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 5 error locations. Result: UNSAFE, OverallTime: 5.5s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 132 SDslu, 533 SDs, 0 SdLazy, 398 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, 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, 13 MinimizatonAttempts, 22 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 484 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 26952 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1181 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/810 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 incorrect! Received shutdown request...