./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 64bit --witnessprinter.graph.data.programhash 76e89a58b9c6f7059fcf416ee7a1666558a3d440 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:37:15,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:37:15,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:37:15,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:37:15,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:37:15,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:37:15,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:37:15,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:37:15,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:37:15,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:37:15,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:37:15,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:37:15,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:37:15,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:37:15,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:37:15,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:37:15,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:37:15,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:37:15,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:37:15,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:37:15,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:37:15,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:37:15,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:37:15,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:37:15,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:37:15,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:37:15,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:37:15,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:37:15,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:37:15,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:37:15,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:37:15,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:37:15,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:37:15,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:37:15,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:37:15,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:37:15,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:37:15,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:37:15,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:37:15,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:37:16,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:37:16,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2019-11-15 23:37:16,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:37:16,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:37:16,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:37:16,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:37:16,015 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:37:16,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:37:16,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 23:37:16,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:37:16,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:37:16,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-15 23:37:16,017 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-15 23:37:16,017 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-15 23:37:16,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:37:16,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:37:16,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:37:16,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:37:16,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:37:16,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:37:16,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:37:16,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:37:16,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:37:16,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:37:16,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:37:16,020 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/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2019-11-15 23:37:16,044 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:37:16,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:37:16,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:37:16,059 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:37:16,059 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:37:16,060 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-11-15 23:37:16,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/data/6ea2e1608/c7bbea71a8674f6e87535928d06b4e17/FLAG3dbe89f63 [2019-11-15 23:37:16,462 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:37:16,463 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2019-11-15 23:37:16,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/data/6ea2e1608/c7bbea71a8674f6e87535928d06b4e17/FLAG3dbe89f63 [2019-11-15 23:37:16,838 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/data/6ea2e1608/c7bbea71a8674f6e87535928d06b4e17 [2019-11-15 23:37:16,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:37:16,841 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-15 23:37:16,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:37:16,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:37:16,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:37:16,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:37:16" (1/1) ... [2019-11-15 23:37:16,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7b4523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:16, skipping insertion in model container [2019-11-15 23:37:16,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:37:16" (1/1) ... [2019-11-15 23:37:16,856 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:37:16,867 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:37:17,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:37:17,035 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:37:17,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:37:17,127 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:37:17,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17 WrapperNode [2019-11-15 23:37:17,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:37:17,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:37:17,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:37:17,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:37:17,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... [2019-11-15 23:37:17,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... [2019-11-15 23:37:17,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... [2019-11-15 23:37:17,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... [2019-11-15 23:37:17,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... [2019-11-15 23:37:17,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... [2019-11-15 23:37:17,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... [2019-11-15 23:37:17,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:37:17,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:37:17,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:37:17,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:37:17,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-15 23:37:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:37:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-15 23:37:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-15 23:37:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-15 23:37:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 23:37:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 23:37:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 23:37:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 23:37:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-15 23:37:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:37:17,433 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:37:17,433 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-15 23:37:17,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:37:17 BoogieIcfgContainer [2019-11-15 23:37:17,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:37:17,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:37:17,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:37:17,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:37:17,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:37:16" (1/3) ... [2019-11-15 23:37:17,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293c6aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:37:17, skipping insertion in model container [2019-11-15 23:37:17,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:37:17" (2/3) ... [2019-11-15 23:37:17,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293c6aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:37:17, skipping insertion in model container [2019-11-15 23:37:17,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:37:17" (3/3) ... [2019-11-15 23:37:17,454 INFO L109 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2019-11-15 23:37:17,463 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:37:17,472 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-15 23:37:17,482 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-15 23:37:17,502 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:37:17,502 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-15 23:37:17,502 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:37:17,502 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:37:17,503 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:37:17,503 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:37:17,503 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:37:17,503 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:37:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-15 23:37:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-15 23:37:17,527 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:17,528 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:17,529 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:17,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763092, now seen corresponding path program 1 times [2019-11-15 23:37:17,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:17,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090475765] [2019-11-15 23:37:17,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:17,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:17,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:17,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090475765] [2019-11-15 23:37:17,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:37:17,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:37:17,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362547166] [2019-11-15 23:37:17,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:37:17,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:37:17,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:37:17,776 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2019-11-15 23:37:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:17,895 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-15 23:37:17,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:37:17,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-15 23:37:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:17,905 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:37:17,905 INFO L226 Difference]: Without dead ends: 30 [2019-11-15 23:37:17,907 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 [2019-11-15 23:37:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-15 23:37:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-15 23:37:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-15 23:37:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-15 23:37:17,942 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 8 [2019-11-15 23:37:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:17,942 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-15 23:37:17,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:37:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-15 23:37:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-15 23:37:17,943 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:17,943 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:17,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763091, now seen corresponding path program 1 times [2019-11-15 23:37:17,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:17,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346925079] [2019-11-15 23:37:17,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:17,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:17,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:18,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346925079] [2019-11-15 23:37:18,005 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:37:18,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:37:18,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867895695] [2019-11-15 23:37:18,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:37:18,006 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:37:18,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:37:18,007 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2019-11-15 23:37:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:18,086 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-15 23:37:18,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:37:18,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-15 23:37:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:18,088 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:37:18,088 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 23:37:18,089 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 [2019-11-15 23:37:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 23:37:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-15 23:37:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 23:37:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-15 23:37:18,092 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2019-11-15 23:37:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:18,093 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-15 23:37:18,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:37:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-15 23:37:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 23:37:18,093 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:18,093 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:18,095 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:18,096 INFO L82 PathProgramCache]: Analyzing trace with hash 707835031, now seen corresponding path program 1 times [2019-11-15 23:37:18,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:18,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936471422] [2019-11-15 23:37:18,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:18,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:18,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:18,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936471422] [2019-11-15 23:37:18,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278557698] [2019-11-15 23:37:18,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:18,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:37:18,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:18,331 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 23:37:18,331 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:37:18,340 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:37:18,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:37:18,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-15 23:37:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:18,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:18,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2019-11-15 23:37:18,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159957758] [2019-11-15 23:37:18,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:37:18,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:37:18,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:37:18,357 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2019-11-15 23:37:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:18,445 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-15 23:37:18,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:37:18,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-15 23:37:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:18,447 INFO L225 Difference]: With dead ends: 30 [2019-11-15 23:37:18,447 INFO L226 Difference]: Without dead ends: 30 [2019-11-15 23:37:18,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:37:18,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-15 23:37:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-15 23:37:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-15 23:37:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-15 23:37:18,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 12 [2019-11-15 23:37:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:18,452 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-15 23:37:18,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:37:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-15 23:37:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 23:37:18,452 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:18,452 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:18,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:18,659 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2098043558, now seen corresponding path program 2 times [2019-11-15 23:37:18,660 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:18,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932339291] [2019-11-15 23:37:18,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:18,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:18,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:18,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932339291] [2019-11-15 23:37:18,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329431812] [2019-11-15 23:37:18,788 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:18,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:37:18,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:18,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:37:18,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:18,862 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 23:37:18,862 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:37:18,873 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:37:18,874 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:37:18,874 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-15 23:37:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:18,961 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:37:18,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2019-11-15 23:37:18,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875685306] [2019-11-15 23:37:18,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:37:18,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:37:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:37:18,962 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2019-11-15 23:37:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:19,009 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-15 23:37:19,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:37:19,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-15 23:37:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:19,010 INFO L225 Difference]: With dead ends: 29 [2019-11-15 23:37:19,010 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 23:37:19,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:37:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 23:37:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-15 23:37:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:37:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-15 23:37:19,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2019-11-15 23:37:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:19,015 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-15 23:37:19,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:37:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-15 23:37:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 23:37:19,016 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:19,016 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:19,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:19,220 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:19,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1880246455, now seen corresponding path program 1 times [2019-11-15 23:37:19,220 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:19,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691691648] [2019-11-15 23:37:19,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:19,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:19,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:19,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691691648] [2019-11-15 23:37:19,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266358244] [2019-11-15 23:37:19,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:19,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:37:19,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:19,373 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:19,373 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-15 23:37:19,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983419270] [2019-11-15 23:37:19,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:37:19,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:37:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:37:19,375 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2019-11-15 23:37:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:19,439 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-15 23:37:19,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:37:19,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-15 23:37:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:19,441 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:37:19,441 INFO L226 Difference]: Without dead ends: 33 [2019-11-15 23:37:19,441 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:37:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-15 23:37:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-15 23:37:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 23:37:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-15 23:37:19,445 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2019-11-15 23:37:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:19,446 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-15 23:37:19,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:37:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-15 23:37:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 23:37:19,446 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:19,447 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:19,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:19,656 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 671779276, now seen corresponding path program 2 times [2019-11-15 23:37:19,656 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:19,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538491592] [2019-11-15 23:37:19,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:19,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:19,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:19,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538491592] [2019-11-15 23:37:19,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833985786] [2019-11-15 23:37:19,740 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:19,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-15 23:37:19,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:19,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:37:19,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:19,786 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 23:37:19,787 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:37:19,791 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:37:19,792 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:37:19,792 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-15 23:37:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:37:19,879 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:37:19,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2019-11-15 23:37:19,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368263434] [2019-11-15 23:37:19,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:37:19,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:37:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:37:19,880 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2019-11-15 23:37:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:19,966 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-11-15 23:37:19,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:37:19,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-15 23:37:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:19,968 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:37:19,968 INFO L226 Difference]: Without dead ends: 33 [2019-11-15 23:37:19,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:37:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-15 23:37:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-15 23:37:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 23:37:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-15 23:37:19,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2019-11-15 23:37:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:19,973 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-15 23:37:19,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:37:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-15 23:37:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:37:19,974 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:19,974 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:20,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:20,176 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:20,176 INFO L82 PathProgramCache]: Analyzing trace with hash -649672835, now seen corresponding path program 1 times [2019-11-15 23:37:20,176 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:20,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181876503] [2019-11-15 23:37:20,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:20,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:20,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:37:20,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181876503] [2019-11-15 23:37:20,226 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:37:20,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:37:20,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733393461] [2019-11-15 23:37:20,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:37:20,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:37:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:37:20,228 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2019-11-15 23:37:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:20,282 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-15 23:37:20,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:37:20,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-15 23:37:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:20,283 INFO L225 Difference]: With dead ends: 32 [2019-11-15 23:37:20,283 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 23:37:20,283 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 [2019-11-15 23:37:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 23:37:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 23:37:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 23:37:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-15 23:37:20,287 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2019-11-15 23:37:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:20,287 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-15 23:37:20,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:37:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-15 23:37:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-15 23:37:20,288 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:20,289 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:20,289 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1334976847, now seen corresponding path program 1 times [2019-11-15 23:37:20,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:20,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29609345] [2019-11-15 23:37:20,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:20,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:20,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:20,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29609345] [2019-11-15 23:37:20,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157885263] [2019-11-15 23:37:20,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:20,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 23:37:20,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:20,423 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:20,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-15 23:37:20,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774811531] [2019-11-15 23:37:20,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:37:20,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:37:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:37:20,425 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2019-11-15 23:37:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:20,487 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-15 23:37:20,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:37:20,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-15 23:37:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:20,488 INFO L225 Difference]: With dead ends: 39 [2019-11-15 23:37:20,489 INFO L226 Difference]: Without dead ends: 39 [2019-11-15 23:37:20,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:37:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-15 23:37:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-11-15 23:37:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-15 23:37:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-15 23:37:20,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2019-11-15 23:37:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:20,493 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-15 23:37:20,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:37:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-15 23:37:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-15 23:37:20,494 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:20,495 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:20,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:20,695 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1360643474, now seen corresponding path program 2 times [2019-11-15 23:37:20,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:20,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898486878] [2019-11-15 23:37:20,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:20,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:20,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:20,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898486878] [2019-11-15 23:37:20,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892341066] [2019-11-15 23:37:20,769 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:20,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-15 23:37:20,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:20,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:37:20,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-15 23:37:20,887 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:37:20,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2019-11-15 23:37:20,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902405507] [2019-11-15 23:37:20,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:37:20,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:20,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:37:20,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:37:20,888 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2019-11-15 23:37:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:20,919 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-15 23:37:20,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:37:20,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-15 23:37:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:20,920 INFO L225 Difference]: With dead ends: 35 [2019-11-15 23:37:20,920 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 23:37:20,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:37:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 23:37:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-15 23:37:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 23:37:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-15 23:37:20,924 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2019-11-15 23:37:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:20,924 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-15 23:37:20,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:37:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-15 23:37:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 23:37:20,925 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:20,925 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:21,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:21,135 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:21,136 INFO L82 PathProgramCache]: Analyzing trace with hash -775549161, now seen corresponding path program 1 times [2019-11-15 23:37:21,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:21,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768234572] [2019-11-15 23:37:21,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:21,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:21,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:21,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768234572] [2019-11-15 23:37:21,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599220805] [2019-11-15 23:37:21,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:21,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:37:21,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:21,287 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:21,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-15 23:37:21,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783294957] [2019-11-15 23:37:21,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 23:37:21,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:21,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 23:37:21,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:37:21,289 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2019-11-15 23:37:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:21,351 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-11-15 23:37:21,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:37:21,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-11-15 23:37:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:21,352 INFO L225 Difference]: With dead ends: 37 [2019-11-15 23:37:21,352 INFO L226 Difference]: Without dead ends: 37 [2019-11-15 23:37:21,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:37:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-15 23:37:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-11-15 23:37:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 23:37:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-15 23:37:21,356 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2019-11-15 23:37:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:21,356 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-15 23:37:21,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 23:37:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-15 23:37:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 23:37:21,357 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:21,357 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:21,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:21,561 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:21,562 INFO L82 PathProgramCache]: Analyzing trace with hash -105276236, now seen corresponding path program 2 times [2019-11-15 23:37:21,562 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:21,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966966566] [2019-11-15 23:37:21,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:21,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:21,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:21,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966966566] [2019-11-15 23:37:21,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230714752] [2019-11-15 23:37:21,639 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:21,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:37:21,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:21,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 23:37:21,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:21,732 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:21,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-15 23:37:21,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875073773] [2019-11-15 23:37:21,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:37:21,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:37:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:37:21,734 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2019-11-15 23:37:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:21,807 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-11-15 23:37:21,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:37:21,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-15 23:37:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:21,808 INFO L225 Difference]: With dead ends: 41 [2019-11-15 23:37:21,808 INFO L226 Difference]: Without dead ends: 41 [2019-11-15 23:37:21,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:37:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-15 23:37:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-15 23:37:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 23:37:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-15 23:37:21,811 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2019-11-15 23:37:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:21,812 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-15 23:37:21,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:37:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-15 23:37:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 23:37:21,813 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:21,813 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:22,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:22,018 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:22,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1144843311, now seen corresponding path program 3 times [2019-11-15 23:37:22,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:22,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658025952] [2019-11-15 23:37:22,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:22,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:22,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:22,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658025952] [2019-11-15 23:37:22,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854002514] [2019-11-15 23:37:22,123 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:22,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-15 23:37:22,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:22,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:37:22,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:22,225 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:22,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-15 23:37:22,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264388432] [2019-11-15 23:37:22,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:37:22,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:37:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:37:22,227 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2019-11-15 23:37:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:22,303 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-15 23:37:22,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:37:22,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-11-15 23:37:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:22,304 INFO L225 Difference]: With dead ends: 45 [2019-11-15 23:37:22,304 INFO L226 Difference]: Without dead ends: 45 [2019-11-15 23:37:22,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:37:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-15 23:37:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-15 23:37:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-15 23:37:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-15 23:37:22,308 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2019-11-15 23:37:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:22,308 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-15 23:37:22,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:37:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-15 23:37:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-15 23:37:22,309 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:22,309 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:22,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:22,510 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash -539904914, now seen corresponding path program 4 times [2019-11-15 23:37:22,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:22,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687079194] [2019-11-15 23:37:22,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:22,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:22,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:22,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687079194] [2019-11-15 23:37:22,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621883481] [2019-11-15 23:37:22,603 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/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 [2019-11-15 23:37:22,647 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:37:22,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:22,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 23:37:22,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:22,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:22,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-15 23:37:22,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092335834] [2019-11-15 23:37:22,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:37:22,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:37:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:37:22,671 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2019-11-15 23:37:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:22,730 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-11-15 23:37:22,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 23:37:22,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-11-15 23:37:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:22,731 INFO L225 Difference]: With dead ends: 49 [2019-11-15 23:37:22,731 INFO L226 Difference]: Without dead ends: 49 [2019-11-15 23:37:22,731 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:37:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-15 23:37:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-15 23:37:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-15 23:37:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-15 23:37:22,734 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2019-11-15 23:37:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:22,734 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-15 23:37:22,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:37:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-15 23:37:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 23:37:22,735 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:22,735 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:22,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:22,936 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:22,936 INFO L82 PathProgramCache]: Analyzing trace with hash 607436427, now seen corresponding path program 5 times [2019-11-15 23:37:22,936 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:22,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000530560] [2019-11-15 23:37:22,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:22,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:22,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:23,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000530560] [2019-11-15 23:37:23,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971193099] [2019-11-15 23:37:23,064 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:23,127 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-15 23:37:23,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:23,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:37:23,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:23,147 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:23,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-15 23:37:23,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449494694] [2019-11-15 23:37:23,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:37:23,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:37:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:37:23,149 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2019-11-15 23:37:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:23,209 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-11-15 23:37:23,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 23:37:23,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-15 23:37:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:23,210 INFO L225 Difference]: With dead ends: 53 [2019-11-15 23:37:23,210 INFO L226 Difference]: Without dead ends: 53 [2019-11-15 23:37:23,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:37:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-15 23:37:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-15 23:37:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 23:37:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-15 23:37:23,214 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2019-11-15 23:37:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:23,214 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-15 23:37:23,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:37:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-15 23:37:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-15 23:37:23,215 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:23,215 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:23,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:23,416 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash 228291112, now seen corresponding path program 6 times [2019-11-15 23:37:23,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:23,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223762248] [2019-11-15 23:37:23,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:23,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:23,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:37:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:23,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223762248] [2019-11-15 23:37:23,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774480739] [2019-11-15 23:37:23,571 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:23,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-15 23:37:23,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:37:23,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 23:37:23,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:37:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:37:23,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:37:23,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-15 23:37:23,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076648705] [2019-11-15 23:37:23,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 23:37:23,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:37:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 23:37:23,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:37:23,714 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2019-11-15 23:37:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:37:23,811 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-15 23:37:23,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:37:23,811 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2019-11-15 23:37:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:37:23,812 INFO L225 Difference]: With dead ends: 54 [2019-11-15 23:37:23,812 INFO L226 Difference]: Without dead ends: 54 [2019-11-15 23:37:23,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:37:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-15 23:37:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-15 23:37:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-15 23:37:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-11-15 23:37:23,816 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2019-11-15 23:37:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:37:23,817 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-11-15 23:37:23,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 23:37:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-11-15 23:37:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-15 23:37:23,818 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:37:23,818 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:37:24,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:37:24,018 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION]=== [2019-11-15 23:37:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:37:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1223356603, now seen corresponding path program 7 times [2019-11-15 23:37:24,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:37:24,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412070764] [2019-11-15 23:37:24,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:24,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:37:24,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:37:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:37:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:37:24,127 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:37:24,127 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 23:37:24,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:37:24 BoogieIcfgContainer [2019-11-15 23:37:24,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:37:24,183 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:37:24,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:37:24,184 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:37:24,184 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:37:17" (3/4) ... [2019-11-15 23:37:24,186 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 23:37:24,261 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a6121b9e-6bd4-4baf-86c8-2245544b07e3/bin/uautomizer/witness.graphml [2019-11-15 23:37:24,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:37:24,262 INFO L168 Benchmark]: Toolchain (without parser) took 7421.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.5 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -205.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:37:24,262 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:37:24,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -187.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:24,263 INFO L168 Benchmark]: Boogie Preprocessor took 27.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:24,263 INFO L168 Benchmark]: RCFGBuilder took 277.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:24,264 INFO L168 Benchmark]: TraceAbstraction took 6741.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -50.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:37:24,264 INFO L168 Benchmark]: Witness Printer took 77.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2019-11-15 23:37:24,266 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 286.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -187.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 277.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6741.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -50.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 77.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; VAL [a={1:0}, i=1, n=0] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=0] [L13] ++n VAL [a={1:0}, i=1, n=1] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=1] [L13] ++n VAL [a={1:0}, i=1, n=2] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=2] [L13] ++n VAL [a={1:0}, i=1, n=3] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=3] [L13] ++n VAL [a={1:0}, i=1, n=4] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=4] [L13] ++n VAL [a={1:0}, i=1, n=5] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=5] [L13] ++n VAL [a={1:0}, i=1, n=6] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=6] [L13] ++n VAL [a={1:0}, i=1, n=7] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=7] [L13] ++n VAL [a={1:0}, i=1, n=8] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=8] [L13] ++n VAL [a={1:0}, i=1, n=9] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=1, n=9] [L13] ++n VAL [a={1:0}, i=1, n=10] [L13] COND FALSE !(n < 10) VAL [a={1:0}, i=1, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={1:0}, i=1, n=10] [L17] EXPR a[i] VAL [0 <= i && i < 10 && a[i] >= 0=1, a={1:0}, a[i]=1, i=1, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={1:0}, a[i]=1, i=1, n=10] [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 7 error locations. Result: UNSAFE, OverallTime: 6.6s, OverallIterations: 16, TraceHistogramMax: 10, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 208 SDslu, 698 SDs, 0 SdLazy, 662 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 469 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=15, 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, 15 MinimizatonAttempts, 33 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 800 NumberOfCodeBlocks, 772 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 720 ConstructedInterpolants, 1 QuantifiedInterpolants, 70815 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1137 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 66/1169 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...