./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:00:06,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:00:06,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:00:06,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:00:06,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:00:06,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:00:06,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:00:06,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:00:06,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:00:06,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:00:06,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:00:06,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:00:06,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:00:06,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:00:06,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:00:06,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:00:06,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:00:06,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:00:06,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:00:06,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:00:06,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:00:06,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:00:06,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:00:06,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:00:06,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:00:06,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:00:06,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:00:06,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:00:06,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:00:06,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:00:06,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:00:06,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:00:06,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:00:06,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:00:06,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:00:06,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:00:06,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:00:06,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:00:06,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:00:06,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:00:06,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:00:06,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:00:06,365 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:00:06,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:00:06,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:00:06,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:00:06,369 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:00:06,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:00:06,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:00:06,369 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:00:06,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:00:06,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:00:06,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:00:06,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:00:06,372 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:00:06,372 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:00:06,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:00:06,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:00:06,373 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:00:06,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:00:06,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:00:06,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:00:06,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:00:06,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:00:06,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:00:06,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:00:06,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:00:06,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:00:06,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:00:06,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:00:06,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2020-11-28 03:00:06,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:00:06,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:00:06,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:00:06,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:00:06,741 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:00:06,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-11-28 03:00:06,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/data/4c60c0a0b/9f1bec5f92474c88bc019b4e10109f75/FLAGc79bae80d [2020-11-28 03:00:07,292 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:00:07,293 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-11-28 03:00:07,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/data/4c60c0a0b/9f1bec5f92474c88bc019b4e10109f75/FLAGc79bae80d [2020-11-28 03:00:07,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/data/4c60c0a0b/9f1bec5f92474c88bc019b4e10109f75 [2020-11-28 03:00:07,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:00:07,669 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:00:07,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:00:07,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:00:07,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:00:07,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f71045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07, skipping insertion in model container [2020-11-28 03:00:07,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:00:07,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:00:07,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:00:07,902 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:00:07,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:00:07,952 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:00:07,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07 WrapperNode [2020-11-28 03:00:07,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:00:07,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:00:07,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:00:07,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:00:07,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... [2020-11-28 03:00:07,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:00:07,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:00:07,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:00:07,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:00:07,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:00:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:00:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:00:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-28 03:00:08,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:00:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-28 03:00:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:00:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:00:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:00:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:00:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:00:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:00:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:00:08,459 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:00:08,459 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-28 03:00:08,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:08 BoogieIcfgContainer [2020-11-28 03:00:08,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:00:08,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:00:08,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:00:08,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:00:08,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:00:07" (1/3) ... [2020-11-28 03:00:08,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb02de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:00:08, skipping insertion in model container [2020-11-28 03:00:08,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:07" (2/3) ... [2020-11-28 03:00:08,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb02de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:00:08, skipping insertion in model container [2020-11-28 03:00:08,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:08" (3/3) ... [2020-11-28 03:00:08,479 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2020-11-28 03:00:08,501 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:00:08,506 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 03:00:08,516 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 03:00:08,536 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:00:08,537 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:00:08,537 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:00:08,537 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:00:08,537 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:00:08,537 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:00:08,537 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:00:08,537 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:00:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-28 03:00:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:00:08,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:08,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:08,563 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-11-28 03:00:08,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:08,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704810856] [2020-11-28 03:00:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:08,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:08,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704810856] [2020-11-28 03:00:08,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:08,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:00:08,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274903657] [2020-11-28 03:00:08,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:00:08,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:08,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:00:08,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:08,810 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-11-28 03:00:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:09,115 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-28 03:00:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:00:09,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 03:00:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:09,129 INFO L225 Difference]: With dead ends: 58 [2020-11-28 03:00:09,129 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 03:00:09,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:00:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 03:00:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-28 03:00:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:00:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-28 03:00:09,178 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-11-28 03:00:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:09,178 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-28 03:00:09,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:00:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-28 03:00:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:00:09,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:09,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:09,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:00:09,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-11-28 03:00:09,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:09,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489964325] [2020-11-28 03:00:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:09,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489964325] [2020-11-28 03:00:09,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:09,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:00:09,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67697251] [2020-11-28 03:00:09,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:09,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:09,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:09,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:00:09,306 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 6 states. [2020-11-28 03:00:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:09,524 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-11-28 03:00:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:09,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-28 03:00:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:09,528 INFO L225 Difference]: With dead ends: 59 [2020-11-28 03:00:09,528 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 03:00:09,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:00:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 03:00:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-11-28 03:00:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:00:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-28 03:00:09,543 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2020-11-28 03:00:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:09,543 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-28 03:00:09,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-28 03:00:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:00:09,545 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:09,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:09,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:00:09,562 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-11-28 03:00:09,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:09,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209096563] [2020-11-28 03:00:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:09,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209096563] [2020-11-28 03:00:09,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:09,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:00:09,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277004673] [2020-11-28 03:00:09,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:00:09,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:09,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:00:09,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:09,666 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-11-28 03:00:09,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:09,763 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-11-28 03:00:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:00:09,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 03:00:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:09,766 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:00:09,766 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:00:09,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:00:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-28 03:00:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 03:00:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-11-28 03:00:09,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2020-11-28 03:00:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:09,774 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-11-28 03:00:09,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:00:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-11-28 03:00:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:00:09,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:09,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:09,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:00:09,776 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:09,776 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2020-11-28 03:00:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:09,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922780864] [2020-11-28 03:00:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:09,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922780864] [2020-11-28 03:00:09,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:09,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:00:09,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796904545] [2020-11-28 03:00:09,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:00:09,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:00:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:09,896 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-11-28 03:00:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:10,014 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-11-28 03:00:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:00:10,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 03:00:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:10,016 INFO L225 Difference]: With dead ends: 47 [2020-11-28 03:00:10,016 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:00:10,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:00:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:00:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-28 03:00:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:00:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-28 03:00:10,022 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2020-11-28 03:00:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:10,023 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-28 03:00:10,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:00:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-28 03:00:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:00:10,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:10,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:10,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:00:10,025 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2020-11-28 03:00:10,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:10,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955006386] [2020-11-28 03:00:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:10,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955006386] [2020-11-28 03:00:10,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339931209] [2020-11-28 03:00:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:00:10,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:10,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:10,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-28 03:00:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535524331] [2020-11-28 03:00:10,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:10,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:00:10,297 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 6 states. [2020-11-28 03:00:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:10,444 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-11-28 03:00:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:00:10,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-28 03:00:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:10,445 INFO L225 Difference]: With dead ends: 69 [2020-11-28 03:00:10,446 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 03:00:10,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:00:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 03:00:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-11-28 03:00:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:00:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-11-28 03:00:10,454 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2020-11-28 03:00:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:10,454 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-11-28 03:00:10,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-11-28 03:00:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:00:10,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:10,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:10,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:10,656 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2020-11-28 03:00:10,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:10,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041741506] [2020-11-28 03:00:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:10,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041741506] [2020-11-28 03:00:10,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145837474] [2020-11-28 03:00:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:00:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:10,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:00:10,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-11-28 03:00:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043689191] [2020-11-28 03:00:10,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:10,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:10,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:10,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:00:10,865 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 6 states. [2020-11-28 03:00:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:11,043 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-11-28 03:00:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:11,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-28 03:00:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:11,045 INFO L225 Difference]: With dead ends: 66 [2020-11-28 03:00:11,045 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 03:00:11,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:00:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 03:00:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-11-28 03:00:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:00:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-11-28 03:00:11,055 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2020-11-28 03:00:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:11,056 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-11-28 03:00:11,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-11-28 03:00:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:00:11,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:11,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:11,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:11,278 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:11,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2020-11-28 03:00:11,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:11,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345506485] [2020-11-28 03:00:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:11,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345506485] [2020-11-28 03:00:11,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:11,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:00:11,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619846468] [2020-11-28 03:00:11,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:00:11,356 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2020-11-28 03:00:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:11,499 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-11-28 03:00:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:11,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-28 03:00:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:11,501 INFO L225 Difference]: With dead ends: 53 [2020-11-28 03:00:11,501 INFO L226 Difference]: Without dead ends: 53 [2020-11-28 03:00:11,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:00:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-28 03:00:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-28 03:00:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 03:00:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-11-28 03:00:11,510 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2020-11-28 03:00:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:11,511 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-11-28 03:00:11,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-11-28 03:00:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:00:11,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:11,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:11,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:00:11,512 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2020-11-28 03:00:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:11,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298823756] [2020-11-28 03:00:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:00:11,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298823756] [2020-11-28 03:00:11,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:00:11,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:00:11,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074303015] [2020-11-28 03:00:11,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:11,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:00:11,652 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 6 states. [2020-11-28 03:00:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:11,831 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-11-28 03:00:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:11,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-28 03:00:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:11,832 INFO L225 Difference]: With dead ends: 59 [2020-11-28 03:00:11,833 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 03:00:11,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:00:11,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 03:00:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-11-28 03:00:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:00:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-11-28 03:00:11,838 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2020-11-28 03:00:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:11,839 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-11-28 03:00:11,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:11,839 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-11-28 03:00:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:00:11,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:11,840 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:11,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:00:11,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2020-11-28 03:00:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:11,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17132808] [2020-11-28 03:00:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:00:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:00:11,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17132808] [2020-11-28 03:00:11,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614487191] [2020-11-28 03:00:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:12,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:00:12,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:00:12,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:00:12,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2020-11-28 03:00:12,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277801577] [2020-11-28 03:00:12,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:12,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:12,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:12,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:00:12,134 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2020-11-28 03:00:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:12,285 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-11-28 03:00:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:12,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-28 03:00:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:12,287 INFO L225 Difference]: With dead ends: 63 [2020-11-28 03:00:12,287 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:00:12,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:00:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:00:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-11-28 03:00:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:00:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-11-28 03:00:12,292 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2020-11-28 03:00:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:12,292 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-11-28 03:00:12,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-11-28 03:00:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:00:12,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:12,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:12,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:12,518 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2020-11-28 03:00:12,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:12,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919593980] [2020-11-28 03:00:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:12,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:12,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:12,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919593980] [2020-11-28 03:00:12,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215831340] [2020-11-28 03:00:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 [2020-11-28 03:00:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:00:12,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:00:12,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:12,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-28 03:00:12,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274339758] [2020-11-28 03:00:12,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:00:12,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:12,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:00:12,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:00:12,767 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 11 states. [2020-11-28 03:00:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:13,103 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-11-28 03:00:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:00:13,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-11-28 03:00:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:13,104 INFO L225 Difference]: With dead ends: 81 [2020-11-28 03:00:13,104 INFO L226 Difference]: Without dead ends: 81 [2020-11-28 03:00:13,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:00:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-28 03:00:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-11-28 03:00:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 03:00:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-11-28 03:00:13,111 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2020-11-28 03:00:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:13,111 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-11-28 03:00:13,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:00:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-11-28 03:00:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:00:13,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:13,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:13,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:13,314 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2020-11-28 03:00:13,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:13,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907873178] [2020-11-28 03:00:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:13,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:13,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:13,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:00:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:00:13,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907873178] [2020-11-28 03:00:13,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225254724] [2020-11-28 03:00:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 [2020-11-28 03:00:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:00:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:13,539 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:00:13,539 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:13,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:13,554 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:00:13,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 03:00:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:00:13,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:13,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-28 03:00:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104276207] [2020-11-28 03:00:13,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:00:13,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:00:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:00:13,662 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 8 states. [2020-11-28 03:00:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:13,863 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-11-28 03:00:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:00:13,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-28 03:00:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:13,865 INFO L225 Difference]: With dead ends: 74 [2020-11-28 03:00:13,865 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 03:00:13,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:00:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 03:00:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-11-28 03:00:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 03:00:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-11-28 03:00:13,872 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 31 [2020-11-28 03:00:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:13,873 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-11-28 03:00:13,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:00:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-11-28 03:00:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-28 03:00:13,874 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:13,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:14,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-28 03:00:14,094 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2020-11-28 03:00:14,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:14,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127029777] [2020-11-28 03:00:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:14,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:14,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:14,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:00:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:00:14,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127029777] [2020-11-28 03:00:14,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769410932] [2020-11-28 03:00:14,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 [2020-11-28 03:00:14,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:00:14,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:00:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:00:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 03:00:14,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:14,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-11-28 03:00:14,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180187900] [2020-11-28 03:00:14,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:00:14,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:14,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:00:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:00:14,361 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 12 states. [2020-11-28 03:00:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:14,959 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-11-28 03:00:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:00:14,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-11-28 03:00:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:14,961 INFO L225 Difference]: With dead ends: 83 [2020-11-28 03:00:14,961 INFO L226 Difference]: Without dead ends: 83 [2020-11-28 03:00:14,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:00:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-28 03:00:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2020-11-28 03:00:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-28 03:00:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-11-28 03:00:14,967 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 43 [2020-11-28 03:00:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:14,967 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-11-28 03:00:14,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:00:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-11-28 03:00:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-28 03:00:14,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:14,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:15,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:15,190 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:15,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:15,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2020-11-28 03:00:15,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:15,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659482875] [2020-11-28 03:00:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:15,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:15,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:15,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:00:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 03:00:15,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659482875] [2020-11-28 03:00:15,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531183111] [2020-11-28 03:00:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 [2020-11-28 03:00:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:00:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:15,386 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:00:15,386 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:15,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:15,392 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:00:15,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-28 03:00:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 03:00:15,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:15,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-11-28 03:00:15,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414113501] [2020-11-28 03:00:15,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:00:15,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:15,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:00:15,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:00:15,513 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 10 states. [2020-11-28 03:00:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:15,747 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-11-28 03:00:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:00:15,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-11-28 03:00:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:15,749 INFO L225 Difference]: With dead ends: 81 [2020-11-28 03:00:15,749 INFO L226 Difference]: Without dead ends: 81 [2020-11-28 03:00:15,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:00:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-28 03:00:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-11-28 03:00:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-28 03:00:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-11-28 03:00:15,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 44 [2020-11-28 03:00:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:15,760 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-11-28 03:00:15,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:00:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-11-28 03:00:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-28 03:00:15,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:15,762 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:15,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:00:15,962 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:15,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1407287743, now seen corresponding path program 2 times [2020-11-28 03:00:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:15,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983831594] [2020-11-28 03:00:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:16,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:16,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:16,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:00:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 03:00:16,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983831594] [2020-11-28 03:00:16,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305001872] [2020-11-28 03:00:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 [2020-11-28 03:00:16,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:00:16,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:00:16,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-28 03:00:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:16,209 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:00:16,209 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:16,213 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:16,213 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:00:16,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-28 03:00:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 03:00:16,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:16,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-28 03:00:16,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647126421] [2020-11-28 03:00:16,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 03:00:16,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:16,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:00:16,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:00:16,494 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 16 states. [2020-11-28 03:00:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:17,138 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-11-28 03:00:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:00:17,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-11-28 03:00:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:17,140 INFO L225 Difference]: With dead ends: 108 [2020-11-28 03:00:17,140 INFO L226 Difference]: Without dead ends: 108 [2020-11-28 03:00:17,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:00:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-28 03:00:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-11-28 03:00:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-28 03:00:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-11-28 03:00:17,145 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 49 [2020-11-28 03:00:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:17,146 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-11-28 03:00:17,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 03:00:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-11-28 03:00:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-28 03:00:17,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:17,147 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:17,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 03:00:17,372 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2125667663, now seen corresponding path program 1 times [2020-11-28 03:00:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:17,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346367565] [2020-11-28 03:00:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:17,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:17,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:17,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:00:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:17,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:00:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:17,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-28 03:00:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-28 03:00:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346367565] [2020-11-28 03:00:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014830910] [2020-11-28 03:00:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 [2020-11-28 03:00:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:00:17,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 03:00:17,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:00:17,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-11-28 03:00:17,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693417649] [2020-11-28 03:00:17,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:00:17,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:17,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:00:17,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:00:17,665 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 13 states. [2020-11-28 03:00:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:18,026 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-11-28 03:00:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:00:18,027 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-11-28 03:00:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:18,028 INFO L225 Difference]: With dead ends: 118 [2020-11-28 03:00:18,028 INFO L226 Difference]: Without dead ends: 112 [2020-11-28 03:00:18,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:00:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-28 03:00:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-11-28 03:00:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-28 03:00:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-11-28 03:00:18,036 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 72 [2020-11-28 03:00:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:18,036 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-11-28 03:00:18,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:00:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-11-28 03:00:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-28 03:00:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:00:18,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:00:18,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 03:00:18,262 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:00:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:00:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash 267240299, now seen corresponding path program 2 times [2020-11-28 03:00:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:00:18,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396883359] [2020-11-28 03:00:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:00:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:18,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:00:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:18,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:00:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:18,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:00:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:18,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:00:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:18,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-28 03:00:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:00:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 03:00:18,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396883359] [2020-11-28 03:00:18,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175812309] [2020-11-28 03:00:18,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/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 [2020-11-28 03:00:18,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:00:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:00:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:00:18,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:00:18,488 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2020-11-28 03:00:18,489 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:18,496 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:18,496 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:00:18,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-11-28 03:00:18,535 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2020-11-28 03:00:18,536 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:18,539 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:18,540 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:00:18,540 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-11-28 03:00:18,580 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2020-11-28 03:00:18,581 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:18,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:18,583 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:00:18,583 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-11-28 03:00:18,624 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2020-11-28 03:00:18,627 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:00:18,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:00:18,630 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:00:18,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-11-28 03:00:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-11-28 03:00:18,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:00:18,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2020-11-28 03:00:18,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378426955] [2020-11-28 03:00:18,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:00:18,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:00:18,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:00:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:00:18,713 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 6 states. [2020-11-28 03:00:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:00:18,808 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-11-28 03:00:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:00:18,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-11-28 03:00:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:00:18,809 INFO L225 Difference]: With dead ends: 97 [2020-11-28 03:00:18,809 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:00:18,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:00:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:00:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:00:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:00:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:00:18,810 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2020-11-28 03:00:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:00:18,810 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:00:18,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:00:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:00:18,810 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:00:19,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:00:19,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:00:19 BoogieIcfgContainer [2020-11-28 03:00:19,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:00:19,015 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:00:19,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:00:19,015 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:00:19,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:08" (3/4) ... [2020-11-28 03:00:19,018 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:00:19,022 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:00:19,022 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-11-28 03:00:19,022 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:00:19,026 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-28 03:00:19,026 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 03:00:19,026 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:00:19,026 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:00:19,051 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1d135c70-c8ab-43a2-ae75-cb39953398e4/bin/uautomizer/witness.graphml [2020-11-28 03:00:19,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:00:19,052 INFO L168 Benchmark]: Toolchain (without parser) took 11383.39 ms. Allocated memory was 77.6 MB in the beginning and 167.8 MB in the end (delta: 90.2 MB). Free memory was 44.6 MB in the beginning and 137.7 MB in the end (delta: -93.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:00:19,053 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 77.6 MB. Free memory was 50.4 MB in the beginning and 50.4 MB in the end (delta: 23.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:00:19,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.16 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 44.6 MB in the beginning and 72.8 MB in the end (delta: -28.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:19,054 INFO L168 Benchmark]: Boogie Preprocessor took 36.36 ms. Allocated memory is still 94.4 MB. Free memory was 72.8 MB in the beginning and 71.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:00:19,054 INFO L168 Benchmark]: RCFGBuilder took 467.89 ms. Allocated memory is still 94.4 MB. Free memory was 71.4 MB in the beginning and 56.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:19,054 INFO L168 Benchmark]: TraceAbstraction took 10547.28 ms. Allocated memory was 94.4 MB in the beginning and 167.8 MB in the end (delta: 73.4 MB). Free memory was 55.6 MB in the beginning and 140.4 MB in the end (delta: -84.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:00:19,055 INFO L168 Benchmark]: Witness Printer took 36.90 ms. Allocated memory is still 167.8 MB. Free memory was 140.4 MB in the beginning and 137.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:00:19,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 77.6 MB. Free memory was 50.4 MB in the beginning and 50.4 MB in the end (delta: 23.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.16 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 44.6 MB in the beginning and 72.8 MB in the end (delta: -28.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.36 ms. Allocated memory is still 94.4 MB. Free memory was 72.8 MB in the beginning and 71.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 467.89 ms. Allocated memory is still 94.4 MB. Free memory was 71.4 MB in the beginning and 56.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10547.28 ms. Allocated memory was 94.4 MB in the beginning and 167.8 MB in the end (delta: 73.4 MB). Free memory was 55.6 MB in the beginning and 140.4 MB in the end (delta: -84.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 36.90 ms. Allocated memory is still 167.8 MB. Free memory was 140.4 MB in the beginning and 137.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.4s, OverallIterations: 16, TraceHistogramMax: 5, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 372 SDtfs, 882 SDslu, 844 SDs, 0 SdLazy, 2298 SolverSat, 178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 455 SyntacticMatches, 19 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred 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: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 140 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 931 NumberOfCodeBlocks, 825 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 905 ConstructedInterpolants, 91 QuantifiedInterpolants, 188970 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1183 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 26 InterpolantComputations, 9 PerfectInterpolantSequences, 661/776 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...