./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-10-22 08:56:28,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:28,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:28,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:28,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:28,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:28,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:28,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:28,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:28,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:28,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:28,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:28,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:28,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:28,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:28,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:28,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:28,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:28,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:28,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:28,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:28,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:28,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:28,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:28,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:28,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:28,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:28,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:28,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:28,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:28,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:28,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:28,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:28,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:28,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:28,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:28,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:28,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:28,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:28,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:28,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:28,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-10-22 08:56:28,322 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:28,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:28,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:28,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:28,324 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:28,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:28,325 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:28,325 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:56:28,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:28,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:28,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:28,326 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 08:56:28,326 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 08:56:28,326 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 08:56:28,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:56:28,327 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:28,327 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:28,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:28,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:28,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:56:28,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:56:28,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:28,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:28,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:56:28,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:28,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:56:28,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2019-10-22 08:56:28,359 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:28,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:28,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:28,374 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:28,374 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:28,375 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2019-10-22 08:56:28,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/data/becc77ded/1bf604d2cf2d47039880e064fd907b6f/FLAG77003fe08 [2019-10-22 08:56:28,800 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:28,801 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/sv-benchmarks/c/memsafety-ext3/realloc1.c [2019-10-22 08:56:28,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/data/becc77ded/1bf604d2cf2d47039880e064fd907b6f/FLAG77003fe08 [2019-10-22 08:56:28,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/data/becc77ded/1bf604d2cf2d47039880e064fd907b6f [2019-10-22 08:56:28,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:28,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-10-22 08:56:28,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:28,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:28,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:28,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:28" (1/1) ... [2019-10-22 08:56:28,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1c7107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:28, skipping insertion in model container [2019-10-22 08:56:28,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:28" (1/1) ... [2019-10-22 08:56:28,836 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:28,850 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:28,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:29,031 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:29,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:29,061 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:29,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29 WrapperNode [2019-10-22 08:56:29,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:29,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:29,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:29,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:29,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... [2019-10-22 08:56:29,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... [2019-10-22 08:56:29,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... [2019-10-22 08:56:29,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... [2019-10-22 08:56:29,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... [2019-10-22 08:56:29,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... [2019-10-22 08:56:29,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... [2019-10-22 08:56:29,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:29,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:29,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:29,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:29,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:29,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-22 08:56:29,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:29,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-22 08:56:29,152 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2019-10-22 08:56:29,152 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-22 08:56:29,152 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-22 08:56:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-22 08:56:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-22 08:56:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-22 08:56:29,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 08:56:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2019-10-22 08:56:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:56:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:56:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:56:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-22 08:56:29,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:29,490 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:29,490 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-22 08:56:29,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:29 BoogieIcfgContainer [2019-10-22 08:56:29,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:29,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:56:29,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:56:29,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:56:29,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:56:28" (1/3) ... [2019-10-22 08:56:29,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea1b4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:29, skipping insertion in model container [2019-10-22 08:56:29,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:29" (2/3) ... [2019-10-22 08:56:29,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea1b4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:29, skipping insertion in model container [2019-10-22 08:56:29,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:29" (3/3) ... [2019-10-22 08:56:29,504 INFO L109 eAbstractionObserver]: Analyzing ICFG realloc1.c [2019-10-22 08:56:29,513 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:56:29,521 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-10-22 08:56:29,537 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-10-22 08:56:29,557 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:56:29,557 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 08:56:29,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:56:29,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:29,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:29,558 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:56:29,558 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:29,558 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:56:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-22 08:56:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 08:56:29,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:29,586 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:29,588 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:29,595 INFO L82 PathProgramCache]: Analyzing trace with hash 604141221, now seen corresponding path program 1 times [2019-10-22 08:56:29,602 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:29,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031379050] [2019-10-22 08:56:29,603 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,603 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:29,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031379050] [2019-10-22 08:56:29,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:29,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:56:29,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250159222] [2019-10-22 08:56:29,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:29,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:29,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:29,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:29,812 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-22 08:56:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:29,903 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-10-22 08:56:29,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:29,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 08:56:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:29,913 INFO L225 Difference]: With dead ends: 39 [2019-10-22 08:56:29,913 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 08:56:29,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 08:56:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-22 08:56:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:56:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-10-22 08:56:29,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2019-10-22 08:56:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:29,948 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-10-22 08:56:29,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-10-22 08:56:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 08:56:29,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:29,949 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:29,950 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash 604141275, now seen corresponding path program 1 times [2019-10-22 08:56:29,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:29,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650832315] [2019-10-22 08:56:29,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:29,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:30,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650832315] [2019-10-22 08:56:30,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:30,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:56:30,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166343910] [2019-10-22 08:56:30,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:30,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:30,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:30,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:30,014 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2019-10-22 08:56:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:30,102 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-22 08:56:30,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:30,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 08:56:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:30,104 INFO L225 Difference]: With dead ends: 32 [2019-10-22 08:56:30,104 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:56:30,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:56:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-10-22 08:56:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:56:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-22 08:56:30,110 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 8 [2019-10-22 08:56:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:30,111 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-22 08:56:30,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-22 08:56:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 08:56:30,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:30,111 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:30,112 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:30,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:30,112 INFO L82 PathProgramCache]: Analyzing trace with hash 604141276, now seen corresponding path program 1 times [2019-10-22 08:56:30,112 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:30,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382863724] [2019-10-22 08:56:30,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:30,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382863724] [2019-10-22 08:56:30,190 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:30,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:56:30,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865283355] [2019-10-22 08:56:30,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:30,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:30,197 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2019-10-22 08:56:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:30,287 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-22 08:56:30,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:30,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 08:56:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:30,290 INFO L225 Difference]: With dead ends: 32 [2019-10-22 08:56:30,290 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:56:30,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:56:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-22 08:56:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 08:56:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-22 08:56:30,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 8 [2019-10-22 08:56:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:30,294 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-22 08:56:30,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-22 08:56:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 08:56:30,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:30,294 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:30,295 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash -572402136, now seen corresponding path program 1 times [2019-10-22 08:56:30,298 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:30,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418935672] [2019-10-22 08:56:30,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:56:30,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418935672] [2019-10-22 08:56:30,350 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:30,350 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:56:30,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445085054] [2019-10-22 08:56:30,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:30,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:30,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:30,352 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2019-10-22 08:56:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:30,421 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-22 08:56:30,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:30,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-22 08:56:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:30,422 INFO L225 Difference]: With dead ends: 32 [2019-10-22 08:56:30,422 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:56:30,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:56:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-10-22 08:56:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:56:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-22 08:56:30,426 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 12 [2019-10-22 08:56:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:30,426 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-22 08:56:30,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-22 08:56:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 08:56:30,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:30,429 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:30,430 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -572402081, now seen corresponding path program 1 times [2019-10-22 08:56:30,430 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:30,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98263381] [2019-10-22 08:56:30,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:30,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98263381] [2019-10-22 08:56:30,515 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:30,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:56:30,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139707963] [2019-10-22 08:56:30,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:56:30,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:30,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:56:30,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:30,517 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2019-10-22 08:56:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:30,580 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-22 08:56:30,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:30,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-22 08:56:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:30,581 INFO L225 Difference]: With dead ends: 32 [2019-10-22 08:56:30,582 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:56:30,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:56:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2019-10-22 08:56:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:56:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-22 08:56:30,585 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2019-10-22 08:56:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:30,585 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-22 08:56:30,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:56:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-22 08:56:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 08:56:30,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:30,586 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:30,586 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash -564596971, now seen corresponding path program 1 times [2019-10-22 08:56:30,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:30,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264379247] [2019-10-22 08:56:30,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:30,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:30,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264379247] [2019-10-22 08:56:30,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796598489] [2019-10-22 08:56:30,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:30,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:56:30,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:30,739 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:30,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-22 08:56:30,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104706958] [2019-10-22 08:56:30,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:56:30,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:30,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:30,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:30,746 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2019-10-22 08:56:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:30,822 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-22 08:56:30,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:30,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-22 08:56:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:30,823 INFO L225 Difference]: With dead ends: 33 [2019-10-22 08:56:30,823 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 08:56:30,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 08:56:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-22 08:56:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 08:56:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-22 08:56:30,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 13 [2019-10-22 08:56:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:30,826 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-22 08:56:30,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:56:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-22 08:56:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:56:30,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:30,835 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:31,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,036 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1942473074, now seen corresponding path program 2 times [2019-10-22 08:56:31,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804013377] [2019-10-22 08:56:31,037 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,037 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804013377] [2019-10-22 08:56:31,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092959558] [2019-10-22 08:56:31,101 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 08:56:31,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:31,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 08:56:31,160 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:56:31,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2019-10-22 08:56:31,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965496712] [2019-10-22 08:56:31,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:56:31,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:31,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:56:31,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:31,162 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 3 states. [2019-10-22 08:56:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:31,180 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-22 08:56:31,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:56:31,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-22 08:56:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:31,183 INFO L225 Difference]: With dead ends: 32 [2019-10-22 08:56:31,183 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:56:31,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:56:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-10-22 08:56:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:56:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-22 08:56:31,186 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 17 [2019-10-22 08:56:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:31,187 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-22 08:56:31,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:56:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-22 08:56:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:56:31,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:31,190 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:31,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,392 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1594147627, now seen corresponding path program 1 times [2019-10-22 08:56:31,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960833650] [2019-10-22 08:56:31,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960833650] [2019-10-22 08:56:31,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210169041] [2019-10-22 08:56:31,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,504 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:31,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-22 08:56:31,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491527424] [2019-10-22 08:56:31,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:56:31,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:56:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:31,505 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2019-10-22 08:56:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:31,558 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-10-22 08:56:31,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:31,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-22 08:56:31,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:31,559 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:56:31,559 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 08:56:31,559 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 08:56:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-22 08:56:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 08:56:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-22 08:56:31,563 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2019-10-22 08:56:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:31,563 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-22 08:56:31,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:56:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-22 08:56:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:56:31,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:31,564 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:31,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,765 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash 838999410, now seen corresponding path program 2 times [2019-10-22 08:56:31,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:31,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331535817] [2019-10-22 08:56:31,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:31,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331535817] [2019-10-22 08:56:31,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754825507] [2019-10-22 08:56:31,821 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:31,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:56:31,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:31,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:56:31,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:31,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:31,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-22 08:56:31,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772095959] [2019-10-22 08:56:31,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:56:31,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:31,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:56:31,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:31,887 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2019-10-22 08:56:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:31,936 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-10-22 08:56:31,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:56:31,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-10-22 08:56:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:31,937 INFO L225 Difference]: With dead ends: 40 [2019-10-22 08:56:31,937 INFO L226 Difference]: Without dead ends: 40 [2019-10-22 08:56:31,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-22 08:56:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-10-22 08:56:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-22 08:56:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-22 08:56:31,941 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2019-10-22 08:56:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:31,942 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-22 08:56:31,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:56:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-22 08:56:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:56:31,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:31,942 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:32,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:32,143 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash 758998927, now seen corresponding path program 3 times [2019-10-22 08:56:32,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:32,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161610270] [2019-10-22 08:56:32,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:32,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161610270] [2019-10-22 08:56:32,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156665789] [2019-10-22 08:56:32,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:32,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 08:56:32,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:32,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:56:32,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:32,268 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:32,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-22 08:56:32,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005926561] [2019-10-22 08:56:32,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:56:32,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:56:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:56:32,269 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2019-10-22 08:56:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:32,334 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-10-22 08:56:32,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:56:32,335 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-22 08:56:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:32,335 INFO L225 Difference]: With dead ends: 44 [2019-10-22 08:56:32,335 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 08:56:32,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:56:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 08:56:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-22 08:56:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 08:56:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-22 08:56:32,338 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2019-10-22 08:56:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:32,339 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-22 08:56:32,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:56:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-22 08:56:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 08:56:32,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:32,340 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:32,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:32,541 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:32,541 INFO L82 PathProgramCache]: Analyzing trace with hash 660364076, now seen corresponding path program 4 times [2019-10-22 08:56:32,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:32,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668633327] [2019-10-22 08:56:32,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:32,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668633327] [2019-10-22 08:56:32,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58422519] [2019-10-22 08:56:32,617 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:32,666 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:56:32,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:32,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:32,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:32,683 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:32,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-22 08:56:32,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427538486] [2019-10-22 08:56:32,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:56:32,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:32,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:56:32,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:32,685 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2019-10-22 08:56:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:32,758 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-10-22 08:56:32,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:56:32,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-10-22 08:56:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:32,759 INFO L225 Difference]: With dead ends: 48 [2019-10-22 08:56:32,760 INFO L226 Difference]: Without dead ends: 48 [2019-10-22 08:56:32,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-22 08:56:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-10-22 08:56:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-22 08:56:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-10-22 08:56:32,764 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2019-10-22 08:56:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:32,764 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-10-22 08:56:32,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:56:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-10-22 08:56:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 08:56:32,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:32,765 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:32,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:32,966 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:32,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:32,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1265514569, now seen corresponding path program 5 times [2019-10-22 08:56:32,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:32,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966823247] [2019-10-22 08:56:32,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:32,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:33,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966823247] [2019-10-22 08:56:33,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024336338] [2019-10-22 08:56:33,064 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:33,098 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-22 08:56:33,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:33,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:33,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:33,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:33,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-22 08:56:33,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737660147] [2019-10-22 08:56:33,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:56:33,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:33,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:56:33,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:56:33,134 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2019-10-22 08:56:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:33,219 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-10-22 08:56:33,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 08:56:33,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-10-22 08:56:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:33,220 INFO L225 Difference]: With dead ends: 52 [2019-10-22 08:56:33,220 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 08:56:33,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:56:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 08:56:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-22 08:56:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-22 08:56:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-10-22 08:56:33,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 35 [2019-10-22 08:56:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:33,228 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-10-22 08:56:33,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:56:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-10-22 08:56:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:56:33,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:33,229 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:33,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:33,430 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:33,430 INFO L82 PathProgramCache]: Analyzing trace with hash 719470310, now seen corresponding path program 6 times [2019-10-22 08:56:33,430 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:33,430 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051542955] [2019-10-22 08:56:33,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:33,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:33,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:33,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051542955] [2019-10-22 08:56:33,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284827667] [2019-10-22 08:56:33,525 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:33,581 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-10-22 08:56:33,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:33,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:56:33,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:33,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:33,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-22 08:56:33,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444317488] [2019-10-22 08:56:33,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:56:33,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:56:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:33,609 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2019-10-22 08:56:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:33,699 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-10-22 08:56:33,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:56:33,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-10-22 08:56:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:33,701 INFO L225 Difference]: With dead ends: 56 [2019-10-22 08:56:33,701 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 08:56:33,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:56:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 08:56:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-10-22 08:56:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 08:56:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-22 08:56:33,708 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 39 [2019-10-22 08:56:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:33,709 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-22 08:56:33,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:56:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-22 08:56:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-22 08:56:33,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:33,709 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:33,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:33,911 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1920487677, now seen corresponding path program 7 times [2019-10-22 08:56:33,912 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:33,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092304730] [2019-10-22 08:56:33,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:33,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:33,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:34,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092304730] [2019-10-22 08:56:34,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233177058] [2019-10-22 08:56:34,026 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:56:34,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:34,086 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:34,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-22 08:56:34,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551551757] [2019-10-22 08:56:34,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:56:34,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:56:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:56:34,088 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 13 states. [2019-10-22 08:56:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:34,173 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-10-22 08:56:34,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 08:56:34,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2019-10-22 08:56:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:34,174 INFO L225 Difference]: With dead ends: 60 [2019-10-22 08:56:34,174 INFO L226 Difference]: Without dead ends: 60 [2019-10-22 08:56:34,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:56:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-22 08:56:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-10-22 08:56:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-22 08:56:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-10-22 08:56:34,184 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 43 [2019-10-22 08:56:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:34,185 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-10-22 08:56:34,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:56:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-10-22 08:56:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-22 08:56:34,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:34,185 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:34,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:34,386 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1099810976, now seen corresponding path program 8 times [2019-10-22 08:56:34,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:34,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892332618] [2019-10-22 08:56:34,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:34,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:34,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:34,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892332618] [2019-10-22 08:56:34,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956820753] [2019-10-22 08:56:34,484 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:34,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:56:34,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:34,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 08:56:34,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:34,549 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:34,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-22 08:56:34,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621590350] [2019-10-22 08:56:34,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:56:34,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:34,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:56:34,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:56:34,550 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 14 states. [2019-10-22 08:56:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:34,636 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-10-22 08:56:34,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 08:56:34,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2019-10-22 08:56:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:34,638 INFO L225 Difference]: With dead ends: 61 [2019-10-22 08:56:34,638 INFO L226 Difference]: Without dead ends: 61 [2019-10-22 08:56:34,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:56:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-22 08:56:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-22 08:56:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-22 08:56:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2019-10-22 08:56:34,641 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2019-10-22 08:56:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:34,641 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2019-10-22 08:56:34,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:56:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2019-10-22 08:56:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 08:56:34,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:34,642 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:34,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:56:34,842 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-10-22 08:56:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -343684163, now seen corresponding path program 9 times [2019-10-22 08:56:34,843 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:34,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171266595] [2019-10-22 08:56:34,843 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:34,843 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:34,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:34,942 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:34,942 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:56:34,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:56:34 BoogieIcfgContainer [2019-10-22 08:56:34,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:56:34,976 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:34,976 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:34,976 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:34,977 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:29" (3/4) ... [2019-10-22 08:56:34,978 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:56:35,028 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7abf5cad-47b6-4cfa-a166-074d3ccae6f2/bin/uautomizer/witness.graphml [2019-10-22 08:56:35,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:35,031 INFO L168 Benchmark]: Toolchain (without parser) took 6207.34 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 221.2 MB). Free memory was 941.8 MB in the beginning and 1.0 GB in the end (delta: -80.8 MB). Peak memory consumption was 140.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:35,031 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:35,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -212.2 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:35,032 INFO L168 Benchmark]: Boogie Preprocessor took 30.03 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:35,032 INFO L168 Benchmark]: RCFGBuilder took 399.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:35,032 INFO L168 Benchmark]: TraceAbstraction took 5483.33 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 97.6 MB). Peak memory consumption was 159.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:35,033 INFO L168 Benchmark]: Witness Printer took 52.85 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:35,035 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 238.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -212.2 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.03 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 399.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5483.33 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 61.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 97.6 MB). Peak memory consumption was 159.5 MB. Max. memory is 11.5 GB. * Witness Printer took 52.85 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=0, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=1, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=1, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=2, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=2, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=3, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=3, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=4, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=4, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=5, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=5, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=6, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=6, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=7, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=7, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=8, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=8, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=9, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=9, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] i++ VAL [i=10, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L10] COND FALSE !(i < 10) VAL [i=10, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={12:0}, p={12:0}] [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 8 error locations. Result: UNSAFE, OverallTime: 5.4s, OverallIterations: 16, TraceHistogramMax: 10, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 297 SDtfs, 243 SDslu, 1005 SDs, 0 SdLazy, 846 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 406 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 46 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 687 NumberOfCodeBlocks, 679 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 611 ConstructedInterpolants, 0 QuantifiedInterpolants, 50469 SizeOfPredicates, 10 NumberOfNonLiveVariables, 969 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 25 InterpolantComputations, 6 PerfectInterpolantSequences, 9/1065 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...