./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer --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 2749915c63b6e758ac6033a38fbdad80769d2869 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:07,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:07,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:07,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:07,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:07,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:07,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:07,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:07,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:07,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:07,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:07,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:07,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:07,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:07,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:07,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:07,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:07,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:07,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:07,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:07,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:07,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:07,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:07,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:07,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:07,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:07,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:07,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:07,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:07,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:07,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:07,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:07,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:07,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:07,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:07,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:07,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:07,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:07,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:07,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:07,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:07,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-10-22 09:01:07,897 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:07,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:07,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:07,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:07,899 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:07,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:07,899 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:07,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:01:07,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:07,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:07,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:07,911 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 09:01:07,911 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 09:01:07,911 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 09:01:07,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:07,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:07,912 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:07,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:07,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:07,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:07,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:07,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:07,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:07,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:07,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:07,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:07,913 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G 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 -> 2749915c63b6e758ac6033a38fbdad80769d2869 [2019-10-22 09:01:07,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:07,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:07,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:07,963 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:07,965 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:07,966 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2019-10-22 09:01:08,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/data/204adb293/72fc6c0564434038956331e500824e15/FLAGe7c7e0f93 [2019-10-22 09:01:08,417 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:08,418 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2019-10-22 09:01:08,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/data/204adb293/72fc6c0564434038956331e500824e15/FLAGe7c7e0f93 [2019-10-22 09:01:08,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/data/204adb293/72fc6c0564434038956331e500824e15 [2019-10-22 09:01:08,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:08,817 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-10-22 09:01:08,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:08,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:08,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:08,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f6e69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:08, skipping insertion in model container [2019-10-22 09:01:08,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:08" (1/1) ... [2019-10-22 09:01:08,830 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:08,846 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:09,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:09,010 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:09,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:09,098 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:09,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09 WrapperNode [2019-10-22 09:01:09,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:09,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:09,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:09,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:09,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... [2019-10-22 09:01:09,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... [2019-10-22 09:01:09,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... [2019-10-22 09:01:09,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... [2019-10-22 09:01:09,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... [2019-10-22 09:01:09,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... [2019-10-22 09:01:09,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... [2019-10-22 09:01:09,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:09,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:09,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:09,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:09,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:09,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-22 09:01:09,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:09,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-22 09:01:09,177 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-22 09:01:09,177 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-22 09:01:09,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-22 09:01:09,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-22 09:01:09,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:01:09,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 09:01:09,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 09:01:09,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:01:09,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-22 09:01:09,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:09,339 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:09,339 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-22 09:01:09,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:09 BoogieIcfgContainer [2019-10-22 09:01:09,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:09,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:09,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:09,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:09,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:08" (1/3) ... [2019-10-22 09:01:09,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c51579b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:09, skipping insertion in model container [2019-10-22 09:01:09,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:09" (2/3) ... [2019-10-22 09:01:09,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c51579b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:09, skipping insertion in model container [2019-10-22 09:01:09,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:09" (3/3) ... [2019-10-22 09:01:09,347 INFO L109 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2019-10-22 09:01:09,356 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:09,370 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-10-22 09:01:09,392 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-10-22 09:01:09,422 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:09,427 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 09:01:09,427 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:09,428 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:09,428 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:09,428 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:09,428 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:09,428 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-22 09:01:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:09,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,462 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,464 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,468 INFO L82 PathProgramCache]: Analyzing trace with hash 996996062, now seen corresponding path program 1 times [2019-10-22 09:01:09,476 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045769907] [2019-10-22 09:01:09,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045769907] [2019-10-22 09:01:09,633 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:09,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:09,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605601424] [2019-10-22 09:01:09,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:01:09,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:01:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:01:09,652 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-22 09:01:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:09,724 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-10-22 09:01:09,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:01:09,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-10-22 09:01:09,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:09,736 INFO L225 Difference]: With dead ends: 28 [2019-10-22 09:01:09,736 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 09:01:09,738 INFO L600 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 [2019-10-22 09:01:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 09:01:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-22 09:01:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 09:01:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-22 09:01:09,767 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 8 [2019-10-22 09:01:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:09,768 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-22 09:01:09,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:01:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-22 09:01:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:09,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,769 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,770 INFO L82 PathProgramCache]: Analyzing trace with hash 996995752, now seen corresponding path program 1 times [2019-10-22 09:01:09,770 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815614186] [2019-10-22 09:01:09,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,771 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815614186] [2019-10-22 09:01:09,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:09,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:01:09,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760534663] [2019-10-22 09:01:09,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:09,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:09,828 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2019-10-22 09:01:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:09,889 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-10-22 09:01:09,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:09,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 09:01:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:09,891 INFO L225 Difference]: With dead ends: 31 [2019-10-22 09:01:09,891 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 09:01:09,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 09:01:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-22 09:01:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 09:01:09,896 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 8 [2019-10-22 09:01:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:09,896 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 09:01:09,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 09:01:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:09,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:09,897 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,897 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash 996995806, now seen corresponding path program 1 times [2019-10-22 09:01:09,897 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551977166] [2019-10-22 09:01:09,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551977166] [2019-10-22 09:01:09,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:09,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:09,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115541565] [2019-10-22 09:01:09,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:09,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:09,959 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2019-10-22 09:01:10,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,019 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-22 09:01:10,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:10,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 09:01:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,020 INFO L225 Difference]: With dead ends: 30 [2019-10-22 09:01:10,020 INFO L226 Difference]: Without dead ends: 30 [2019-10-22 09:01:10,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-22 09:01:10,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-10-22 09:01:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 09:01:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-22 09:01:10,024 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2019-10-22 09:01:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,024 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-22 09:01:10,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-22 09:01:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:10,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,025 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:10,025 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,026 INFO L82 PathProgramCache]: Analyzing trace with hash 996995805, now seen corresponding path program 1 times [2019-10-22 09:01:10,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537868940] [2019-10-22 09:01:10,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537868940] [2019-10-22 09:01:10,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:10,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:10,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26204560] [2019-10-22 09:01:10,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:10,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:10,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:10,066 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2019-10-22 09:01:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,107 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-10-22 09:01:10,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:10,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 09:01:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,109 INFO L225 Difference]: With dead ends: 25 [2019-10-22 09:01:10,109 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 09:01:10,109 INFO L600 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 [2019-10-22 09:01:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 09:01:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-22 09:01:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:01:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-22 09:01:10,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2019-10-22 09:01:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,112 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-22 09:01:10,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-22 09:01:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:01:10,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,113 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:10,113 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,114 INFO L82 PathProgramCache]: Analyzing trace with hash 63449068, now seen corresponding path program 1 times [2019-10-22 09:01:10,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814204779] [2019-10-22 09:01:10,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:10,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814204779] [2019-10-22 09:01:10,163 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:10,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:10,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443226773] [2019-10-22 09:01:10,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:10,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:10,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:10,165 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2019-10-22 09:01:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,196 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-10-22 09:01:10,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:10,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-22 09:01:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,198 INFO L225 Difference]: With dead ends: 22 [2019-10-22 09:01:10,198 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 09:01:10,198 INFO L600 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 [2019-10-22 09:01:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 09:01:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-22 09:01:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:01:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-10-22 09:01:10,201 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2019-10-22 09:01:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,201 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-10-22 09:01:10,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-10-22 09:01:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:01:10,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,202 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:10,202 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash 63449121, now seen corresponding path program 1 times [2019-10-22 09:01:10,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662935324] [2019-10-22 09:01:10,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662935324] [2019-10-22 09:01:10,311 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:10,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 09:01:10,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555187079] [2019-10-22 09:01:10,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:10,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:10,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:10,317 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2019-10-22 09:01:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,382 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-10-22 09:01:10,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:10,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-22 09:01:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,383 INFO L225 Difference]: With dead ends: 23 [2019-10-22 09:01:10,383 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:01:10,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:01:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-10-22 09:01:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 09:01:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 09:01:10,386 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2019-10-22 09:01:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,386 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 09:01:10,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 09:01:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 09:01:10,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,387 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:10,387 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,388 INFO L82 PathProgramCache]: Analyzing trace with hash 425550780, now seen corresponding path program 1 times [2019-10-22 09:01:10,388 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598185356] [2019-10-22 09:01:10,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598185356] [2019-10-22 09:01:10,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548872940] [2019-10-22 09:01:10,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:01:10,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,551 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:10,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-22 09:01:10,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165252588] [2019-10-22 09:01:10,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:10,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:10,552 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2019-10-22 09:01:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,592 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 09:01:10,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:10,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-10-22 09:01:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,593 INFO L225 Difference]: With dead ends: 27 [2019-10-22 09:01:10,593 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 09:01:10,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 09:01:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-10-22 09:01:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:01:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-22 09:01:10,596 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2019-10-22 09:01:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,596 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-22 09:01:10,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-22 09:01:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:01:10,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:10,597 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:10,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:10,800 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash 316362009, now seen corresponding path program 2 times [2019-10-22 09:01:10,801 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:10,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901307866] [2019-10-22 09:01:10,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:10,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:10,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901307866] [2019-10-22 09:01:10,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477333932] [2019-10-22 09:01:10,885 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:10,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 09:01:10,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:10,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:01:10,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:01:10,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:10,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2019-10-22 09:01:10,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498156031] [2019-10-22 09:01:10,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:10,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:10,959 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2019-10-22 09:01:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:10,994 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-22 09:01:10,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:10,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-22 09:01:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:10,996 INFO L225 Difference]: With dead ends: 26 [2019-10-22 09:01:10,996 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 09:01:10,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 09:01:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-22 09:01:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:01:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-22 09:01:10,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2019-10-22 09:01:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:10,999 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-22 09:01:11,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-22 09:01:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:01:11,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:11,001 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:11,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:11,201 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash 316354064, now seen corresponding path program 1 times [2019-10-22 09:01:11,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:11,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787086181] [2019-10-22 09:01:11,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787086181] [2019-10-22 09:01:11,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739300235] [2019-10-22 09:01:11,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:11,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-22 09:01:11,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332563221] [2019-10-22 09:01:11,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:11,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:11,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:11,313 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2019-10-22 09:01:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:11,353 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-22 09:01:11,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:11,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-22 09:01:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:11,354 INFO L225 Difference]: With dead ends: 31 [2019-10-22 09:01:11,354 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 09:01:11,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 09:01:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-10-22 09:01:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 09:01:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-22 09:01:11,357 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2019-10-22 09:01:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:11,358 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-22 09:01:11,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-22 09:01:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:01:11,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:11,358 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:11,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:11,560 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,560 INFO L82 PathProgramCache]: Analyzing trace with hash -564453139, now seen corresponding path program 2 times [2019-10-22 09:01:11,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:11,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517683675] [2019-10-22 09:01:11,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517683675] [2019-10-22 09:01:11,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040826530] [2019-10-22 09:01:11,633 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:11,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:11,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:11,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:11,691 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:11,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-22 09:01:11,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044226273] [2019-10-22 09:01:11,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:01:11,692 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:01:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:11,692 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2019-10-22 09:01:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:11,741 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-22 09:01:11,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:11,742 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-10-22 09:01:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:11,743 INFO L225 Difference]: With dead ends: 35 [2019-10-22 09:01:11,743 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:01:11,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:01:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-22 09:01:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 09:01:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-22 09:01:11,746 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 23 [2019-10-22 09:01:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:11,746 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-22 09:01:11,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:01:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-22 09:01:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 09:01:11,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:11,748 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:11,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:11,948 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,949 INFO L82 PathProgramCache]: Analyzing trace with hash 817651018, now seen corresponding path program 3 times [2019-10-22 09:01:11,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:11,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956620276] [2019-10-22 09:01:11,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:11,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956620276] [2019-10-22 09:01:12,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044791263] [2019-10-22 09:01:12,009 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:12,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 09:01:12,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:12,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:12,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,062 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:12,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-22 09:01:12,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563416848] [2019-10-22 09:01:12,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:12,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:12,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:12,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:12,064 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2019-10-22 09:01:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:12,113 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-22 09:01:12,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:01:12,113 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-22 09:01:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:12,114 INFO L225 Difference]: With dead ends: 39 [2019-10-22 09:01:12,114 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 09:01:12,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 09:01:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-10-22 09:01:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 09:01:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-22 09:01:12,117 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2019-10-22 09:01:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:12,117 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-22 09:01:12,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-22 09:01:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 09:01:12,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,118 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:12,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:12,319 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1120001241, now seen corresponding path program 4 times [2019-10-22 09:01:12,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:12,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964261057] [2019-10-22 09:01:12,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964261057] [2019-10-22 09:01:12,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377186854] [2019-10-22 09:01:12,382 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:12,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:12,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:12,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:01:12,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,435 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:12,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-22 09:01:12,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073705031] [2019-10-22 09:01:12,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:01:12,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:12,439 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 10 states. [2019-10-22 09:01:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:12,508 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-22 09:01:12,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:01:12,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-10-22 09:01:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:12,509 INFO L225 Difference]: With dead ends: 43 [2019-10-22 09:01:12,510 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 09:01:12,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 09:01:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-22 09:01:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 09:01:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-22 09:01:12,513 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 31 [2019-10-22 09:01:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:12,513 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-22 09:01:12,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:01:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-22 09:01:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 09:01:12,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,514 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:12,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:12,717 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 92254852, now seen corresponding path program 5 times [2019-10-22 09:01:12,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:12,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716960566] [2019-10-22 09:01:12,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716960566] [2019-10-22 09:01:12,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184561834] [2019-10-22 09:01:12,815 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:12,867 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-22 09:01:12,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:12,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:01:12,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,897 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:12,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-22 09:01:12,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844315734] [2019-10-22 09:01:12,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:01:12,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:12,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:01:12,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:12,898 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 11 states. [2019-10-22 09:01:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:12,990 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-22 09:01:12,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:01:12,991 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-10-22 09:01:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:12,991 INFO L225 Difference]: With dead ends: 47 [2019-10-22 09:01:12,992 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 09:01:12,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 09:01:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-22 09:01:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 09:01:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-22 09:01:12,995 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2019-10-22 09:01:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:12,995 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-22 09:01:12,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:01:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-22 09:01:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 09:01:12,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,996 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:13,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:13,197 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash 696273761, now seen corresponding path program 6 times [2019-10-22 09:01:13,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:13,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799149873] [2019-10-22 09:01:13,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799149873] [2019-10-22 09:01:13,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546252999] [2019-10-22 09:01:13,281 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:13,334 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-10-22 09:01:13,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:13,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:01:13,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,356 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:13,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-22 09:01:13,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944960000] [2019-10-22 09:01:13,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:01:13,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:01:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:13,358 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 12 states. [2019-10-22 09:01:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:13,421 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-22 09:01:13,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:01:13,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-10-22 09:01:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:13,422 INFO L225 Difference]: With dead ends: 51 [2019-10-22 09:01:13,422 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 09:01:13,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:13,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 09:01:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-22 09:01:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 09:01:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-22 09:01:13,425 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 39 [2019-10-22 09:01:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:13,426 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-22 09:01:13,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:01:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-22 09:01:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-22 09:01:13,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:13,427 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:13,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:13,628 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1214304834, now seen corresponding path program 7 times [2019-10-22 09:01:13,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:13,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768435295] [2019-10-22 09:01:13,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768435295] [2019-10-22 09:01:13,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993581514] [2019-10-22 09:01:13,714 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/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 [2019-10-22 09:01:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:13,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,762 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:13,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-22 09:01:13,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202839523] [2019-10-22 09:01:13,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:13,772 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:13,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:13,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:13,772 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 13 states. [2019-10-22 09:01:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:13,822 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-10-22 09:01:13,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:01:13,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2019-10-22 09:01:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:13,823 INFO L225 Difference]: With dead ends: 55 [2019-10-22 09:01:13,823 INFO L226 Difference]: Without dead ends: 55 [2019-10-22 09:01:13,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-22 09:01:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-10-22 09:01:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 09:01:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-10-22 09:01:13,827 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2019-10-22 09:01:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:13,827 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-10-22 09:01:13,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-10-22 09:01:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-22 09:01:13,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:13,828 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:14,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:14,029 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2090572187, now seen corresponding path program 8 times [2019-10-22 09:01:14,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:14,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813616364] [2019-10-22 09:01:14,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813616364] [2019-10-22 09:01:14,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467871444] [2019-10-22 09:01:14,135 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:14,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:14,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:14,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:01:14,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,209 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:14,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-22 09:01:14,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604872750] [2019-10-22 09:01:14,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:01:14,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:14,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:01:14,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:14,210 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 14 states. [2019-10-22 09:01:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:14,260 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-10-22 09:01:14,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:14,260 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2019-10-22 09:01:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:14,261 INFO L225 Difference]: With dead ends: 56 [2019-10-22 09:01:14,261 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 09:01:14,261 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 09:01:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-22 09:01:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 09:01:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-10-22 09:01:14,265 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 47 [2019-10-22 09:01:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:14,265 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-10-22 09:01:14,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:01:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-10-22 09:01:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 09:01:14,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:14,266 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:14,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:14,467 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 09:01:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1402261240, now seen corresponding path program 9 times [2019-10-22 09:01:14,467 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:14,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532434620] [2019-10-22 09:01:14,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:14,531 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:14,531 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:14,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:14 BoogieIcfgContainer [2019-10-22 09:01:14,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:14,559 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:14,559 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:14,559 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:14,560 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:09" (3/4) ... [2019-10-22 09:01:14,561 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:01:14,609 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d9ef3d73-7449-47a1-9fe9-f7e7614caf58/bin/uautomizer/witness.graphml [2019-10-22 09:01:14,609 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:14,611 INFO L168 Benchmark]: Toolchain (without parser) took 5793.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.5 MB). Free memory was 948.5 MB in the beginning and 990.7 MB in the end (delta: -42.2 MB). Peak memory consumption was 131.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:14,611 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:14,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -135.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:14,612 INFO L168 Benchmark]: Boogie Preprocessor took 29.34 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:14,612 INFO L168 Benchmark]: RCFGBuilder took 211.98 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:14,613 INFO L168 Benchmark]: TraceAbstraction took 5217.05 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 83.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.9 MB). Peak memory consumption was 138.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:14,613 INFO L168 Benchmark]: Witness Printer took 50.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 990.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:14,614 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 281.35 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -135.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.34 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 211.98 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5217.05 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 83.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.9 MB). Peak memory consumption was 138.3 MB. Max. memory is 11.5 GB. * Witness Printer took 50.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 990.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L6] char *p = alloca(10 * sizeof(char)); [L8] int i = 0; VAL [alloca(10 * sizeof(char))={12:0}, i=0, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=0, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=1, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=1, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=2, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=97, alloca(10 * sizeof(char))={12:0}, i=2, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=3, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=3, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=4, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=4, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=5, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=5, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=6, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=6, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=7, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=7, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=8, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=8, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=9, p={12:0}] [L8] COND TRUE i < 10 [L9] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={12:0}, i=9, p={12:0}] [L8] i++ VAL [alloca(10 * sizeof(char))={12:0}, i=10, p={12:0}] [L8] COND FALSE !(i < 10) VAL [alloca(10 * sizeof(char))={12:0}, i=10, p={12:0}] [L12] EXPR p[2] VAL [alloca(10 * sizeof(char))={12:0}, i=10, p={12:0}, p[2]=97] [L12] COND TRUE p[2] == 'a' [L13] free(p) VAL [alloca(10 * sizeof(char))={12:0}, i=10, p={12:0}] [L13] free(p) VAL [alloca(10 * sizeof(char))={12:0}, i=10, p={12:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 8 error locations. Result: UNSAFE, OverallTime: 5.1s, OverallIterations: 17, TraceHistogramMax: 10, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 243 SDtfs, 235 SDslu, 783 SDs, 0 SdLazy, 697 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 414 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=16, 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, 16 MinimizatonAttempts, 36 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 703 NumberOfCodeBlocks, 689 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 626 ConstructedInterpolants, 1 QuantifiedInterpolants, 53253 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1008 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 26 InterpolantComputations, 7 PerfectInterpolantSequences, 9/1065 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...