./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/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 cf39454d83b4ec00341bd0b620b0fa6b2321ce21 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:31:11,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:31:11,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:31:11,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:31:11,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:31:11,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:31:11,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:31:11,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:31:11,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:31:11,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:31:11,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:31:11,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:31:11,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:31:11,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:31:11,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:31:11,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:31:11,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:31:11,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:31:11,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:31:11,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:31:11,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:31:11,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:31:11,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:31:11,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:31:11,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:31:11,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:31:11,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:31:11,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:31:11,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:31:11,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:31:11,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:31:11,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:31:11,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:31:11,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:31:11,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:31:11,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:31:11,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:31:11,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:31:11,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:31:11,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:31:11,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:31:11,866 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-11-29 21:31:11,889 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:31:11,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:31:11,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:31:11,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:31:11,892 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:31:11,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:31:11,892 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:31:11,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:31:11,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:31:11,894 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 21:31:11,894 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 21:31:11,894 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 21:31:11,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:31:11,895 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 21:31:11,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:31:11,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:31:11,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:31:11,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:31:11,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:31:11,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:31:11,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:31:11,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:31:11,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:31:11,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:31:11,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:31:11,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf39454d83b4ec00341bd0b620b0fa6b2321ce21 [2020-11-29 21:31:12,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:31:12,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:31:12,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:31:12,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:31:12,162 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:31:12,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2020-11-29 21:31:12,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/data/b1f28ea80/1e1968470c9a40af8be490f12585c2bd/FLAG778ef53fb [2020-11-29 21:31:12,660 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:31:12,664 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2020-11-29 21:31:12,673 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/data/b1f28ea80/1e1968470c9a40af8be490f12585c2bd/FLAG778ef53fb [2020-11-29 21:31:13,095 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/data/b1f28ea80/1e1968470c9a40af8be490f12585c2bd [2020-11-29 21:31:13,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:31:13,098 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 21:31:13,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:31:13,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:31:13,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:31:13,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51651ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13, skipping insertion in model container [2020-11-29 21:31:13,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:31:13,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:31:13,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:31:13,282 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:31:13,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:31:13,315 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:31:13,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13 WrapperNode [2020-11-29 21:31:13,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:31:13,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:31:13,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:31:13,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:31:13,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... [2020-11-29 21:31:13,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:31:13,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:31:13,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:31:13,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:31:13,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/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 [2020-11-29 21:31:13,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 21:31:13,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:31:13,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 21:31:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 21:31:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 21:31:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:31:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 21:31:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 21:31:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 21:31:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 21:31:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:31:13,723 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:31:13,729 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-29 21:31:13,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:31:13 BoogieIcfgContainer [2020-11-29 21:31:13,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:31:13,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:31:13,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:31:13,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:31:13,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:31:13" (1/3) ... [2020-11-29 21:31:13,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d9ea08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:31:13, skipping insertion in model container [2020-11-29 21:31:13,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:13" (2/3) ... [2020-11-29 21:31:13,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d9ea08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:31:13, skipping insertion in model container [2020-11-29 21:31:13,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:31:13" (3/3) ... [2020-11-29 21:31:13,761 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays01-EquivalentConstantIndices-1.c [2020-11-29 21:31:13,771 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:31:13,783 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-11-29 21:31:13,809 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-11-29 21:31:13,839 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:31:13,839 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 21:31:13,840 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:31:13,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:31:13,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:31:13,840 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:31:13,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:31:13,840 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:31:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-29 21:31:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:31:13,860 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:13,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:13,861 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1425323941, now seen corresponding path program 1 times [2020-11-29 21:31:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:13,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828485458] [2020-11-29 21:31:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:14,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828485458] [2020-11-29 21:31:14,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:31:14,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:31:14,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093091885] [2020-11-29 21:31:14,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:31:14,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:14,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:31:14,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:31:14,065 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-11-29 21:31:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:14,205 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-11-29 21:31:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:31:14,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 21:31:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:14,220 INFO L225 Difference]: With dead ends: 29 [2020-11-29 21:31:14,229 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 21:31:14,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:31:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 21:31:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 21:31:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 21:31:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-29 21:31:14,320 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 8 [2020-11-29 21:31:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:14,321 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-29 21:31:14,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:31:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-29 21:31:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:31:14,322 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:14,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:14,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:31:14,323 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1425324251, now seen corresponding path program 1 times [2020-11-29 21:31:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:14,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419205974] [2020-11-29 21:31:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419205974] [2020-11-29 21:31:14,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:31:14,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:31:14,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756910053] [2020-11-29 21:31:14,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:31:14,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:14,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:31:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:31:14,427 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2020-11-29 21:31:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:14,508 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-11-29 21:31:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:31:14,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 21:31:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:14,510 INFO L225 Difference]: With dead ends: 32 [2020-11-29 21:31:14,510 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 21:31:14,511 INFO L677 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 [2020-11-29 21:31:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 21:31:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-11-29 21:31:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 21:31:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 21:31:14,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 8 [2020-11-29 21:31:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:14,516 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 21:31:14,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:31:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-29 21:31:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:31:14,517 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:14,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:14,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:31:14,519 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:14,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1425324200, now seen corresponding path program 1 times [2020-11-29 21:31:14,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:14,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675174837] [2020-11-29 21:31:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:14,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675174837] [2020-11-29 21:31:14,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:31:14,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:31:14,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663149288] [2020-11-29 21:31:14,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:31:14,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:14,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:31:14,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:31:14,613 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2020-11-29 21:31:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:14,684 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-29 21:31:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:31:14,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 21:31:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:14,686 INFO L225 Difference]: With dead ends: 31 [2020-11-29 21:31:14,686 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 21:31:14,686 INFO L677 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 [2020-11-29 21:31:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 21:31:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-29 21:31:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 21:31:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-29 21:31:14,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 8 [2020-11-29 21:31:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:14,691 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-29 21:31:14,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:31:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-29 21:31:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:31:14,692 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:14,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:14,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:31:14,692 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:14,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1425324201, now seen corresponding path program 1 times [2020-11-29 21:31:14,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:14,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886222170] [2020-11-29 21:31:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:14,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886222170] [2020-11-29 21:31:14,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:31:14,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:31:14,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368425259] [2020-11-29 21:31:14,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:31:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:31:14,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:31:14,760 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 4 states. [2020-11-29 21:31:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:14,821 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-29 21:31:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:31:14,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 21:31:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:14,823 INFO L225 Difference]: With dead ends: 24 [2020-11-29 21:31:14,823 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 21:31:14,823 INFO L677 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 [2020-11-29 21:31:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 21:31:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 21:31:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 21:31:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 21:31:14,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2020-11-29 21:31:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:14,827 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 21:31:14,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:31:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 21:31:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 21:31:14,828 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:14,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:14,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 21:31:14,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 450080617, now seen corresponding path program 1 times [2020-11-29 21:31:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:14,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528406372] [2020-11-29 21:31:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:31:14,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528406372] [2020-11-29 21:31:14,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:31:14,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:31:14,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217619240] [2020-11-29 21:31:14,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:31:14,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:14,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:31:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:31:14,906 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2020-11-29 21:31:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:14,953 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-11-29 21:31:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:31:14,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 21:31:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:14,955 INFO L225 Difference]: With dead ends: 21 [2020-11-29 21:31:14,955 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 21:31:14,955 INFO L677 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 [2020-11-29 21:31:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 21:31:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-29 21:31:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 21:31:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-29 21:31:14,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2020-11-29 21:31:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:14,959 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-29 21:31:14,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:31:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-29 21:31:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 21:31:14,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:14,962 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:14,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 21:31:14,962 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash 450080667, now seen corresponding path program 1 times [2020-11-29 21:31:14,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:14,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436727755] [2020-11-29 21:31:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:15,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:15,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436727755] [2020-11-29 21:31:15,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583944862] [2020-11-29 21:31:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/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 [2020-11-29 21:31:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:31:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:31:15,210 INFO L384 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 [2020-11-29 21:31:15,211 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 21:31:15,236 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 21:31:15,237 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 21:31:15,237 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 21:31:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:15,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:31:15,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-11-29 21:31:15,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744893865] [2020-11-29 21:31:15,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:31:15,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:31:15,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:31:15,267 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-11-29 21:31:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:15,348 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-29 21:31:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:31:15,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-29 21:31:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:15,349 INFO L225 Difference]: With dead ends: 27 [2020-11-29 21:31:15,350 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 21:31:15,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:31:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 21:31:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 21:31:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 21:31:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 21:31:15,360 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2020-11-29 21:31:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:15,360 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 21:31:15,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:31:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-29 21:31:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 21:31:15,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:15,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:15,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 21:31:15,563 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:15,563 INFO L82 PathProgramCache]: Analyzing trace with hash -615550124, now seen corresponding path program 1 times [2020-11-29 21:31:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:15,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046417076] [2020-11-29 21:31:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:15,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046417076] [2020-11-29 21:31:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167689533] [2020-11-29 21:31:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/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 [2020-11-29 21:31:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 21:31:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:31:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:15,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:31:15,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-29 21:31:15,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62831483] [2020-11-29 21:31:15,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 21:31:15,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:15,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:31:15,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:31:15,800 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-11-29 21:31:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:15,858 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-29 21:31:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:31:15,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-29 21:31:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:15,860 INFO L225 Difference]: With dead ends: 34 [2020-11-29 21:31:15,860 INFO L226 Difference]: Without dead ends: 34 [2020-11-29 21:31:15,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:31:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-29 21:31:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-11-29 21:31:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 21:31:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-29 21:31:15,864 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2020-11-29 21:31:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:15,865 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-29 21:31:15,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 21:31:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-29 21:31:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 21:31:15,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:15,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:16,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:31:16,067 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 21:31:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash 769072305, now seen corresponding path program 2 times [2020-11-29 21:31:16,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:16,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396296282] [2020-11-29 21:31:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:16,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:31:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396296282] [2020-11-29 21:31:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379598511] [2020-11-29 21:31:16,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/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 [2020-11-29 21:31:16,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 21:31:16,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:31:16,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:31:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:31:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-29 21:31:16,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:31:16,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-11-29 21:31:16,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557030943] [2020-11-29 21:31:16,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:31:16,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:31:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:31:16,321 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 5 states. [2020-11-29 21:31:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:16,353 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-29 21:31:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:31:16,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-11-29 21:31:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:16,354 INFO L225 Difference]: With dead ends: 30 [2020-11-29 21:31:16,354 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 21:31:16,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:31:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 21:31:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 21:31:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 21:31:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 21:31:16,356 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-29 21:31:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:16,356 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:31:16,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:31:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:31:16,356 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 21:31:16,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:31:16,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:31:16 BoogieIcfgContainer [2020-11-29 21:31:16,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:31:16,561 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:31:16,561 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:31:16,561 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:31:16,562 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:31:13" (3/4) ... [2020-11-29 21:31:16,565 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 21:31:16,571 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 21:31:16,572 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 21:31:16,576 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 21:31:16,576 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-29 21:31:16,577 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:31:16,577 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:31:16,623 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3398e109-ff09-42d4-8f47-4d798f9c1ae7/bin/uautomizer/witness.graphml [2020-11-29 21:31:16,624 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:31:16,625 INFO L168 Benchmark]: Toolchain (without parser) took 3525.99 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 78.1 MB in the beginning and 72.3 MB in the end (delta: 5.8 MB). Peak memory consumption was 37.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:16,625 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 77.6 MB. Free memory was 37.8 MB in the beginning and 37.8 MB in the end (delta: 36.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:31:16,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.29 ms. Allocated memory is still 109.1 MB. Free memory was 77.8 MB in the beginning and 86.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:16,626 INFO L168 Benchmark]: Boogie Preprocessor took 47.84 ms. Allocated memory is still 109.1 MB. Free memory was 86.4 MB in the beginning and 85.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:16,627 INFO L168 Benchmark]: RCFGBuilder took 370.71 ms. Allocated memory is still 109.1 MB. Free memory was 84.8 MB in the beginning and 72.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:16,627 INFO L168 Benchmark]: TraceAbstraction took 2822.95 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 71.7 MB in the beginning and 74.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:16,628 INFO L168 Benchmark]: Witness Printer took 62.94 ms. Allocated memory is still 140.5 MB. Free memory was 74.4 MB in the beginning and 72.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:16,630 INFO L339 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 77.6 MB. Free memory was 37.8 MB in the beginning and 37.8 MB in the end (delta: 36.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 202.29 ms. Allocated memory is still 109.1 MB. Free memory was 77.8 MB in the beginning and 86.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.84 ms. Allocated memory is still 109.1 MB. Free memory was 86.4 MB in the beginning and 85.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 370.71 ms. Allocated memory is still 109.1 MB. Free memory was 84.8 MB in the beginning and 72.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2822.95 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 71.7 MB in the beginning and 74.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. * Witness Printer took 62.94 ms. Allocated memory is still 140.5 MB. Free memory was 74.4 MB in the beginning and 72.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.7s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 61 SDslu, 129 SDs, 0 SdLazy, 283 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=7, 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, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 168 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 157 ConstructedInterpolants, 1 QuantifiedInterpolants, 14110 SizeOfPredicates, 1 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 29/91 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...