./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.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_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 03:18:16,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:18:16,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:18:16,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:18:16,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:18:16,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:18:16,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:18:16,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:18:16,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:18:16,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:18:16,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:18:16,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:18:16,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:18:16,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:18:16,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:18:16,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:18:16,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:18:16,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:18:16,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:18:16,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:18:16,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:18:16,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:18:16,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:18:16,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:18:16,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:18:16,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:18:16,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:18:16,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:18:16,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:18:16,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:18:16,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:18:16,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:18:16,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:18:16,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:18:16,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:18:16,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:18:16,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:18:16,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:18:16,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:18:16,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:18:16,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:18:16,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:18:16,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:18:16,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:18:16,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:18:16,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:18:16,309 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:18:16,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:18:16,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:18:16,310 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:18:16,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:18:16,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:18:16,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:18:16,313 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:18:16,313 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:18:16,313 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:18:16,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:18:16,314 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:18:16,314 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:18:16,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:18:16,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:18:16,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:18:16,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:18:16,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:18:16,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:18:16,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:18:16,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:18:16,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:18:16,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:18:16,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:18:16,318 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_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2020-11-28 03:18:16,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:18:16,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:18:16,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:18:16,746 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:18:16,747 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:18:16,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-11-28 03:18:16,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/data/d6b99b047/ee20fd0f65574e8a9daeee1738d23482/FLAGc3d37f6f9 [2020-11-28 03:18:17,460 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:18:17,461 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-11-28 03:18:17,474 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/data/d6b99b047/ee20fd0f65574e8a9daeee1738d23482/FLAGc3d37f6f9 [2020-11-28 03:18:17,796 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/data/d6b99b047/ee20fd0f65574e8a9daeee1738d23482 [2020-11-28 03:18:17,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:18:17,801 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:18:17,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:18:17,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:18:17,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:18:17,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:18:17" (1/1) ... [2020-11-28 03:18:17,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2825c080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:17, skipping insertion in model container [2020-11-28 03:18:17,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:18:17" (1/1) ... [2020-11-28 03:18:17,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:18:17,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:18:18,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:18:18,054 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:18:18,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:18:18,089 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:18:18,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18 WrapperNode [2020-11-28 03:18:18,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:18:18,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:18:18,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:18:18,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:18:18,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... [2020-11-28 03:18:18,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... [2020-11-28 03:18:18,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... [2020-11-28 03:18:18,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... [2020-11-28 03:18:18,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... [2020-11-28 03:18:18,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... [2020-11-28 03:18:18,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... [2020-11-28 03:18:18,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:18:18,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:18:18,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:18:18,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:18:18,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:18:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:18:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-28 03:18:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:18:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-28 03:18:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:18:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:18:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:18:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:18:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:18:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:18:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:18:18,811 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:18:18,811 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-28 03:18:18,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:18 BoogieIcfgContainer [2020-11-28 03:18:18,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:18:18,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:18:18,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:18:18,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:18:18,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:18:17" (1/3) ... [2020-11-28 03:18:18,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2c4f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:18:18, skipping insertion in model container [2020-11-28 03:18:18,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:18" (2/3) ... [2020-11-28 03:18:18,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2c4f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:18:18, skipping insertion in model container [2020-11-28 03:18:18,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:18" (3/3) ... [2020-11-28 03:18:18,831 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2020-11-28 03:18:18,844 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:18:18,849 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 03:18:18,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 03:18:18,904 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:18:18,904 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:18:18,904 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:18:18,905 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:18:18,905 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:18:18,906 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:18:18,906 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:18:18,906 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:18:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-28 03:18:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:18:18,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:18,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:18,944 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 03:18:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-11-28 03:18:18,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:18,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052207163] [2020-11-28 03:18:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:19,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:19,223 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 03:18:19,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052207163] [2020-11-28 03:18:19,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:18:19,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:18:19,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650163600] [2020-11-28 03:18:19,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:18:19,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:19,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:18:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:18:19,258 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-11-28 03:18:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:19,520 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-28 03:18:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:18:19,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 03:18:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:19,532 INFO L225 Difference]: With dead ends: 58 [2020-11-28 03:18:19,537 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 03:18:19,540 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 03:18:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 03:18:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-28 03:18:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:18:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-28 03:18:19,598 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-11-28 03:18:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:19,600 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-28 03:18:19,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:18:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-28 03:18:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:18:19,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:19,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:19,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:18:19,604 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 03:18:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-11-28 03:18:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:19,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303289522] [2020-11-28 03:18:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:19,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:19,756 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 03:18:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303289522] [2020-11-28 03:18:19,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:18:19,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:18:19,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043302490] [2020-11-28 03:18:19,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:18:19,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:18:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:18:19,776 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 6 states. [2020-11-28 03:18:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:20,022 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-11-28 03:18:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:18:20,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-28 03:18:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:20,025 INFO L225 Difference]: With dead ends: 59 [2020-11-28 03:18:20,025 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 03:18:20,026 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 03:18:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 03:18:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-11-28 03:18:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:18:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-28 03:18:20,039 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2020-11-28 03:18:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:20,040 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-28 03:18:20,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:18:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-28 03:18:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:18:20,041 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:20,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:20,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:18:20,041 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 03:18:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-11-28 03:18:20,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:20,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496227368] [2020-11-28 03:18:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,160 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 03:18:20,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496227368] [2020-11-28 03:18:20,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:18:20,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:18:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149439842] [2020-11-28 03:18:20,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:18:20,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:20,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:18:20,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:18:20,170 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-11-28 03:18:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:20,269 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-11-28 03:18:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:18:20,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 03:18:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:20,281 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:18:20,281 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:18:20,282 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 03:18:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:18:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-28 03:18:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 03:18:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-11-28 03:18:20,293 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2020-11-28 03:18:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:20,293 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-11-28 03:18:20,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:18:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-11-28 03:18:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:18:20,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:20,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:20,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:18:20,295 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 03:18:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2020-11-28 03:18:20,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:20,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405008792] [2020-11-28 03:18:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,381 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 03:18:20,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405008792] [2020-11-28 03:18:20,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:18:20,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:18:20,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642363110] [2020-11-28 03:18:20,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:18:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:18:20,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:18:20,389 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2020-11-28 03:18:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:20,486 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-11-28 03:18:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:18:20,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 03:18:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:20,488 INFO L225 Difference]: With dead ends: 47 [2020-11-28 03:18:20,488 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:18:20,488 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 03:18:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:18:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-28 03:18:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:18:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-28 03:18:20,494 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2020-11-28 03:18:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:20,494 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-28 03:18:20,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:18:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-28 03:18:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:18:20,495 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:20,495 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 03:18:20,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:18:20,496 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 03:18:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2020-11-28 03:18:20,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:20,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018160529] [2020-11-28 03:18:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,553 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 03:18:20,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018160529] [2020-11-28 03:18:20,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086849339] [2020-11-28 03:18:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:20,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:18:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:20,737 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 03:18:20,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:20,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-28 03:18:20,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991341072] [2020-11-28 03:18:20,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:18:20,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:18:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:18:20,740 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 6 states. [2020-11-28 03:18:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:20,918 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-11-28 03:18:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:18:20,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-28 03:18:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:20,920 INFO L225 Difference]: With dead ends: 69 [2020-11-28 03:18:20,921 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 03:18:20,921 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 03:18:20,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 03:18:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-11-28 03:18:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:18:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-11-28 03:18:20,929 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2020-11-28 03:18:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:20,929 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-11-28 03:18:20,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:18:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-11-28 03:18:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:18:20,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:20,930 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 03:18:21,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:21,144 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 03:18:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2020-11-28 03:18:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:21,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928863250] [2020-11-28 03:18:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:21,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:21,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 03:18:21,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928863250] [2020-11-28 03:18:21,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:18:21,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:18:21,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960966372] [2020-11-28 03:18:21,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:18:21,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:18:21,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:18:21,261 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 4 states. [2020-11-28 03:18:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:21,373 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-11-28 03:18:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:18:21,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-28 03:18:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:21,376 INFO L225 Difference]: With dead ends: 62 [2020-11-28 03:18:21,376 INFO L226 Difference]: Without dead ends: 62 [2020-11-28 03:18:21,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 03:18:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-28 03:18:21,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-11-28 03:18:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:18:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-11-28 03:18:21,382 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2020-11-28 03:18:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:21,383 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-11-28 03:18:21,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:18:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-11-28 03:18:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:18:21,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:21,384 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 03:18:21,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:18:21,384 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 03:18:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2020-11-28 03:18:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:21,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885774571] [2020-11-28 03:18:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:21,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:21,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:18:21,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885774571] [2020-11-28 03:18:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517138667] [2020-11-28 03:18:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:18:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:21,591 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-28 03:18:21,592 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:18:21,592 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:21,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:21,601 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 03:18:21,601 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-28 03:18:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:18:21,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:21,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-28 03:18:21,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789131632] [2020-11-28 03:18:21,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:18:21,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:21,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:18:21,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:18:21,672 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 8 states. [2020-11-28 03:18:21,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:21,870 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-11-28 03:18:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:18:21,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-28 03:18:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:21,871 INFO L225 Difference]: With dead ends: 53 [2020-11-28 03:18:21,871 INFO L226 Difference]: Without dead ends: 53 [2020-11-28 03:18:21,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-28 03:18:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-28 03:18:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 03:18:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-11-28 03:18:21,876 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2020-11-28 03:18:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:21,877 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-11-28 03:18:21,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:18:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-11-28 03:18:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:18:21,878 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:21,878 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 03:18:22,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:22,079 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 03:18:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2020-11-28 03:18:22,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:22,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909917876] [2020-11-28 03:18:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:18:22,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909917876] [2020-11-28 03:18:22,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631056633] [2020-11-28 03:18:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:18:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:22,287 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:22,287 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-28 03:18:22,288 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:22,311 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-28 03:18:22,319 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:18:22,320 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-11-28 03:18:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:18:22,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:22,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-28 03:18:22,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011466962] [2020-11-28 03:18:22,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:18:22,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:18:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:18:22,375 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 8 states. [2020-11-28 03:18:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:22,650 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-11-28 03:18:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:18:22,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-28 03:18:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:22,652 INFO L225 Difference]: With dead ends: 59 [2020-11-28 03:18:22,652 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 03:18:22,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 03:18:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-11-28 03:18:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:18:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-11-28 03:18:22,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2020-11-28 03:18:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:22,657 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-11-28 03:18:22,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:18:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-11-28 03:18:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:18:22,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:22,658 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 03:18:22,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:22,859 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 03:18:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2020-11-28 03:18:22,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:22,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458484410] [2020-11-28 03:18:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:18:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458484410] [2020-11-28 03:18:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632780464] [2020-11-28 03:18:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:18:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:23,103 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 03:18:23,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:18:23,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-11-28 03:18:23,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909394871] [2020-11-28 03:18:23,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:18:23,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:23,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:18:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:23,106 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2020-11-28 03:18:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:23,287 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-11-28 03:18:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:18:23,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-28 03:18:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:23,288 INFO L225 Difference]: With dead ends: 63 [2020-11-28 03:18:23,289 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:18:23,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:18:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-11-28 03:18:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:18:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-11-28 03:18:23,293 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2020-11-28 03:18:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:23,294 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-11-28 03:18:23,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:18:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-11-28 03:18:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:18:23,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:23,295 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 03:18:23,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:23,496 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 03:18:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2020-11-28 03:18:23,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:23,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754590937] [2020-11-28 03:18:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:23,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:23,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:23,598 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 03:18:23,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754590937] [2020-11-28 03:18:23,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080846696] [2020-11-28 03:18:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:18:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:23,764 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 03:18:23,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:23,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-28 03:18:23,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661499938] [2020-11-28 03:18:23,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:18:23,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:18:23,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:23,766 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 11 states. [2020-11-28 03:18:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:24,141 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-11-28 03:18:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:18:24,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-11-28 03:18:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:24,142 INFO L225 Difference]: With dead ends: 81 [2020-11-28 03:18:24,142 INFO L226 Difference]: Without dead ends: 81 [2020-11-28 03:18:24,143 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 03:18:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-28 03:18:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-11-28 03:18:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 03:18:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-11-28 03:18:24,146 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2020-11-28 03:18:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:24,147 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-11-28 03:18:24,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:18:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-11-28 03:18:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:18:24,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:24,147 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 03:18:24,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 03:18:24,348 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 03:18:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2020-11-28 03:18:24,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:24,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791297566] [2020-11-28 03:18:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:24,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:24,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:24,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:24,483 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 03:18:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791297566] [2020-11-28 03:18:24,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682301009] [2020-11-28 03:18:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:18:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:24,564 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_25|]} [2020-11-28 03:18:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:18:24,570 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:18:24,570 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:24,584 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:18:24,595 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2020-11-28 03:18:24,603 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:24,614 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:24,614 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:18:24,614 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-11-28 03:18:24,866 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 03:18:24,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:24,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2020-11-28 03:18:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017777195] [2020-11-28 03:18:24,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:18:24,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:24,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:18:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:24,869 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 10 states. [2020-11-28 03:18:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:25,154 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-11-28 03:18:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:18:25,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-11-28 03:18:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:25,155 INFO L225 Difference]: With dead ends: 69 [2020-11-28 03:18:25,155 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 03:18:25,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:18:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 03:18:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-11-28 03:18:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-28 03:18:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-11-28 03:18:25,161 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 31 [2020-11-28 03:18:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:25,162 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-11-28 03:18:25,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:18:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-11-28 03:18:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 03:18:25,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:25,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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 03:18:25,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:25,383 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 03:18:25,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:25,383 INFO L82 PathProgramCache]: Analyzing trace with hash 894123677, now seen corresponding path program 1 times [2020-11-28 03:18:25,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:25,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900220536] [2020-11-28 03:18:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:25,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:25,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:18:25,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900220536] [2020-11-28 03:18:25,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468228063] [2020-11-28 03:18:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:25,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:18:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:18:25,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:25,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-28 03:18:25,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560794176] [2020-11-28 03:18:25,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:18:25,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:18:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:25,672 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 9 states. [2020-11-28 03:18:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:25,955 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-11-28 03:18:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:18:25,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-11-28 03:18:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:25,957 INFO L225 Difference]: With dead ends: 94 [2020-11-28 03:18:25,957 INFO L226 Difference]: Without dead ends: 94 [2020-11-28 03:18:25,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-28 03:18:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2020-11-28 03:18:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-28 03:18:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-11-28 03:18:25,962 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 37 [2020-11-28 03:18:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:25,962 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-11-28 03:18:25,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:18:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-11-28 03:18:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-28 03:18:25,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:25,963 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 03:18:26,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:26,179 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 03:18:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:26,179 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2020-11-28 03:18:26,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:26,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015344896] [2020-11-28 03:18:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:26,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:26,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:26,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 03:18:26,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015344896] [2020-11-28 03:18:26,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426807501] [2020-11-28 03:18:26,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:26,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:18:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:18:26,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:26,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2020-11-28 03:18:26,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767984001] [2020-11-28 03:18:26,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:18:26,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:18:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:26,487 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 11 states. [2020-11-28 03:18:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:27,033 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-11-28 03:18:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:18:27,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-11-28 03:18:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:27,035 INFO L225 Difference]: With dead ends: 124 [2020-11-28 03:18:27,035 INFO L226 Difference]: Without dead ends: 124 [2020-11-28 03:18:27,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:18:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-28 03:18:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2020-11-28 03:18:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-28 03:18:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-11-28 03:18:27,041 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 43 [2020-11-28 03:18:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:27,041 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-11-28 03:18:27,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:18:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-11-28 03:18:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-28 03:18:27,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:27,049 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 03:18:27,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 03:18:27,263 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 03:18:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2020-11-28 03:18:27,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:27,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916087340] [2020-11-28 03:18:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:27,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:27,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:27,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 03:18:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916087340] [2020-11-28 03:18:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864702406] [2020-11-28 03:18:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:18:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:27,511 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:27,511 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-28 03:18:27,512 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:27,545 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-28 03:18:27,551 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:18:27,551 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2020-11-28 03:18:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:18:27,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:27,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2020-11-28 03:18:27,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559471581] [2020-11-28 03:18:27,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:18:27,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:18:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:18:27,698 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 12 states. [2020-11-28 03:18:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:28,028 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2020-11-28 03:18:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:18:28,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-11-28 03:18:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:28,030 INFO L225 Difference]: With dead ends: 116 [2020-11-28 03:18:28,030 INFO L226 Difference]: Without dead ends: 116 [2020-11-28 03:18:28,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:18:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-28 03:18:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-11-28 03:18:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-28 03:18:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-11-28 03:18:28,037 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 44 [2020-11-28 03:18:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:28,037 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-11-28 03:18:28,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:18:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-11-28 03:18:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-28 03:18:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:28,039 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:28,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:28,247 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 03:18:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2073773289, now seen corresponding path program 2 times [2020-11-28 03:18:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:28,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831858183] [2020-11-28 03:18:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:28,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:28,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:28,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:28,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 03:18:28,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831858183] [2020-11-28 03:18:28,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592583141] [2020-11-28 03:18:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/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 03:18:28,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:18:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 03:18:28,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:28,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-11-28 03:18:28,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799957196] [2020-11-28 03:18:28,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:18:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:18:28,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:18:28,567 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 12 states. [2020-11-28 03:18:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:28,969 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-11-28 03:18:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:18:28,970 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-11-28 03:18:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:28,972 INFO L225 Difference]: With dead ends: 115 [2020-11-28 03:18:28,972 INFO L226 Difference]: Without dead ends: 109 [2020-11-28 03:18:28,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:18:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-28 03:18:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-11-28 03:18:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-28 03:18:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2020-11-28 03:18:28,978 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 47 [2020-11-28 03:18:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:28,979 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2020-11-28 03:18:28,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:18:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2020-11-28 03:18:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-28 03:18:28,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:28,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:29,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 03:18:29,188 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 03:18:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1381084076, now seen corresponding path program 3 times [2020-11-28 03:18:29,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:29,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422593025] [2020-11-28 03:18:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:29,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:29,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:29,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:29,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-28 03:18:29,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422593025] [2020-11-28 03:18:29,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477976334] [2020-11-28 03:18:29,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:29,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:18:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:29,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:18:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:29,451 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_26|]} [2020-11-28 03:18:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:18:29,457 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:18:29,458 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:29,470 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:29,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:18:29,477 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2020-11-28 03:18:29,478 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:29,486 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:29,487 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:18:29,487 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2020-11-28 03:18:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 03:18:29,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:29,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2020-11-28 03:18:29,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974579432] [2020-11-28 03:18:29,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:18:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:18:29,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:18:29,909 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand 12 states. [2020-11-28 03:18:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:30,838 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-11-28 03:18:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-28 03:18:30,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-11-28 03:18:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:30,840 INFO L225 Difference]: With dead ends: 116 [2020-11-28 03:18:30,841 INFO L226 Difference]: Without dead ends: 116 [2020-11-28 03:18:30,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:18:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-28 03:18:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-11-28 03:18:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-28 03:18:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-11-28 03:18:30,847 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 52 [2020-11-28 03:18:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:30,847 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-11-28 03:18:30,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:18:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-11-28 03:18:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-28 03:18:30,849 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:30,849 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:31,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:18:31,055 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:18:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1868655978, now seen corresponding path program 3 times [2020-11-28 03:18:31,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:31,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114099070] [2020-11-28 03:18:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:31,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:31,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:31,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:31,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 76 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-28 03:18:31,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114099070] [2020-11-28 03:18:31,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850344780] [2020-11-28 03:18:31,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:31,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:18:31,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:18:31,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-11-28 03:18:31,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:31,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 18 [2020-11-28 03:18:31,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851115009] [2020-11-28 03:18:31,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-28 03:18:31,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 03:18:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:18:31,444 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 18 states. [2020-11-28 03:18:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:32,230 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2020-11-28 03:18:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-28 03:18:32,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-11-28 03:18:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:32,232 INFO L225 Difference]: With dead ends: 154 [2020-11-28 03:18:32,232 INFO L226 Difference]: Without dead ends: 154 [2020-11-28 03:18:32,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2020-11-28 03:18:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-28 03:18:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2020-11-28 03:18:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-28 03:18:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2020-11-28 03:18:32,238 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 74 [2020-11-28 03:18:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:32,238 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2020-11-28 03:18:32,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-28 03:18:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2020-11-28 03:18:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-28 03:18:32,248 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:32,248 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:32,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 03:18:32,466 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:18:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash 241209475, now seen corresponding path program 1 times [2020-11-28 03:18:32,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:32,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133838749] [2020-11-28 03:18:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-28 03:18:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-11-28 03:18:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 97 proven. 49 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-11-28 03:18:32,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133838749] [2020-11-28 03:18:32,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44682071] [2020-11-28 03:18:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:18:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 194 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-11-28 03:18:32,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:32,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2020-11-28 03:18:32,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234930843] [2020-11-28 03:18:32,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:18:32,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:18:32,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:18:32,886 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand 15 states. [2020-11-28 03:18:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:33,401 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-11-28 03:18:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:18:33,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 103 [2020-11-28 03:18:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:33,402 INFO L225 Difference]: With dead ends: 161 [2020-11-28 03:18:33,402 INFO L226 Difference]: Without dead ends: 155 [2020-11-28 03:18:33,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:18:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-28 03:18:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2020-11-28 03:18:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-28 03:18:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2020-11-28 03:18:33,408 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 103 [2020-11-28 03:18:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:33,409 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2020-11-28 03:18:33,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:18:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2020-11-28 03:18:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-11-28 03:18:33,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:33,411 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:33,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:18:33,623 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:18:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash -311092151, now seen corresponding path program 2 times [2020-11-28 03:18:33,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:33,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775695592] [2020-11-28 03:18:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:33,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:33,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:33,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:33,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:33,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-28 03:18:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:33,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-28 03:18:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-11-28 03:18:33,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775695592] [2020-11-28 03:18:33,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080792531] [2020-11-28 03:18:33,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:33,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:18:33,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:18:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:34,024 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 03:18:34,025 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 03:18:34,027 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:34,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:34,037 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 03:18:34,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 03:18:34,160 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 03:18:34,160 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 03:18:34,161 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:34,177 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:34,178 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 03:18:34,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 03:18:34,278 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 03:18:34,278 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 03:18:34,280 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:34,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:34,289 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 03:18:34,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 03:18:34,444 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 03:18:34,445 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 03:18:34,446 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:34,453 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:34,454 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 03:18:34,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 03:18:34,651 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-28 03:18:34,651 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-11-28 03:18:34,652 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:34,659 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:34,660 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 03:18:34,660 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-28 03:18:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2020-11-28 03:18:34,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:18:34,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2020-11-28 03:18:34,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358439058] [2020-11-28 03:18:34,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:18:34,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:34,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:18:34,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:18:34,904 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand 6 states. [2020-11-28 03:18:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:35,020 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-11-28 03:18:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:18:35,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-11-28 03:18:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:35,022 INFO L225 Difference]: With dead ends: 138 [2020-11-28 03:18:35,023 INFO L226 Difference]: Without dead ends: 135 [2020-11-28 03:18:35,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:18:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-28 03:18:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-11-28 03:18:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-28 03:18:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-11-28 03:18:35,029 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 113 [2020-11-28 03:18:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:35,030 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-11-28 03:18:35,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:18:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-11-28 03:18:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-28 03:18:35,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:35,032 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:35,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:35,233 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:18:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash 419498507, now seen corresponding path program 1 times [2020-11-28 03:18:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:35,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810131842] [2020-11-28 03:18:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-28 03:18:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-28 03:18:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2020-11-28 03:18:35,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810131842] [2020-11-28 03:18:35,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812536260] [2020-11-28 03:18:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:18:35,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 189 proven. 18 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-11-28 03:18:35,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:35,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2020-11-28 03:18:35,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765251146] [2020-11-28 03:18:35,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-28 03:18:35,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:35,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-28 03:18:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:18:35,722 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 19 states. [2020-11-28 03:18:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:36,373 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2020-11-28 03:18:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-28 03:18:36,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 126 [2020-11-28 03:18:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:36,375 INFO L225 Difference]: With dead ends: 170 [2020-11-28 03:18:36,375 INFO L226 Difference]: Without dead ends: 167 [2020-11-28 03:18:36,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2020-11-28 03:18:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-28 03:18:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2020-11-28 03:18:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-28 03:18:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2020-11-28 03:18:36,381 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 126 [2020-11-28 03:18:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:36,381 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2020-11-28 03:18:36,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-28 03:18:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2020-11-28 03:18:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-11-28 03:18:36,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:36,384 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:36,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:36,607 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:18:36,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:36,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1289574162, now seen corresponding path program 2 times [2020-11-28 03:18:36,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:36,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338766774] [2020-11-28 03:18:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-28 03:18:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-28 03:18:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-28 03:18:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2020-11-28 03:18:36,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338766774] [2020-11-28 03:18:36,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188231271] [2020-11-28 03:18:36,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:36,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:36,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:36,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:18:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 346 proven. 34 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-11-28 03:18:37,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:37,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2020-11-28 03:18:37,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957585596] [2020-11-28 03:18:37,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-28 03:18:37,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:37,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-28 03:18:37,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:18:37,192 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 22 states. [2020-11-28 03:18:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:38,150 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2020-11-28 03:18:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-28 03:18:38,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 162 [2020-11-28 03:18:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:38,153 INFO L225 Difference]: With dead ends: 220 [2020-11-28 03:18:38,153 INFO L226 Difference]: Without dead ends: 220 [2020-11-28 03:18:38,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2020-11-28 03:18:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-28 03:18:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 179. [2020-11-28 03:18:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-11-28 03:18:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2020-11-28 03:18:38,161 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 162 [2020-11-28 03:18:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:38,162 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2020-11-28 03:18:38,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-28 03:18:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2020-11-28 03:18:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-11-28 03:18:38,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:38,165 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:38,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:38,382 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:18:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1415289466, now seen corresponding path program 3 times [2020-11-28 03:18:38,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:38,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164021685] [2020-11-28 03:18:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:18:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:18:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:18:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:18:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-28 03:18:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-28 03:18:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-28 03:18:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-11-28 03:18:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2020-11-28 03:18:38,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164021685] [2020-11-28 03:18:38,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730191802] [2020-11-28 03:18:38,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:38,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:18:38,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:18:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:38,713 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_29|]} [2020-11-28 03:18:38,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:18:38,717 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 03:18:38,717 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:38,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:18:38,728 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2020-11-28 03:18:38,729 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:18:38,734 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:18:38,735 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:18:38,735 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-28 03:18:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2020-11-28 03:18:39,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:18:39,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-11-28 03:18:39,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394043782] [2020-11-28 03:18:39,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:39,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:18:39,512 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand 7 states. [2020-11-28 03:18:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:39,592 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2020-11-28 03:18:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:18:39,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-11-28 03:18:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:39,596 INFO L225 Difference]: With dead ends: 178 [2020-11-28 03:18:39,596 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:18:39,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 201 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:18:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:18:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:18:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:18:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:18:39,596 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 203 [2020-11-28 03:18:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:39,597 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:18:39,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:18:39,597 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:18:39,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-28 03:18:39,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:18:39 BoogieIcfgContainer [2020-11-28 03:18:39,801 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:18:39,802 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:18:39,802 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:18:39,802 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:18:39,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:18" (3/4) ... [2020-11-28 03:18:39,805 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:18:39,812 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-28 03:18:39,812 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-11-28 03:18:39,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-28 03:18:39,818 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-28 03:18:39,818 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 03:18:39,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 03:18:39,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:18:39,875 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0762ec3b-c410-4854-902c-2bfe8e0ebef5/bin/uautomizer/witness.graphml [2020-11-28 03:18:39,875 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:18:39,876 INFO L168 Benchmark]: Toolchain (without parser) took 22075.12 ms. Allocated memory was 107.0 MB in the beginning and 226.5 MB in the end (delta: 119.5 MB). Free memory was 77.8 MB in the beginning and 126.9 MB in the end (delta: -49.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:39,876 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 67.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:18:39,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.39 ms. Allocated memory is still 107.0 MB. Free memory was 77.3 MB in the beginning and 85.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:39,877 INFO L168 Benchmark]: Boogie Preprocessor took 38.38 ms. Allocated memory is still 107.0 MB. Free memory was 85.0 MB in the beginning and 83.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:18:39,878 INFO L168 Benchmark]: RCFGBuilder took 683.32 ms. Allocated memory is still 107.0 MB. Free memory was 83.5 MB in the beginning and 66.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:39,880 INFO L168 Benchmark]: TraceAbstraction took 20982.20 ms. Allocated memory was 107.0 MB in the beginning and 226.5 MB in the end (delta: 119.5 MB). Free memory was 66.1 MB in the beginning and 129.7 MB in the end (delta: -63.6 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:39,881 INFO L168 Benchmark]: Witness Printer took 73.48 ms. Allocated memory is still 226.5 MB. Free memory was 129.7 MB in the beginning and 126.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:39,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 67.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.39 ms. Allocated memory is still 107.0 MB. Free memory was 77.3 MB in the beginning and 85.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.38 ms. Allocated memory is still 107.0 MB. Free memory was 85.0 MB in the beginning and 83.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 683.32 ms. Allocated memory is still 107.0 MB. Free memory was 83.5 MB in the beginning and 66.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20982.20 ms. Allocated memory was 107.0 MB in the beginning and 226.5 MB in the end (delta: 119.5 MB). Free memory was 66.1 MB in the beginning and 129.7 MB in the end (delta: -63.6 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. * Witness Printer took 73.48 ms. Allocated memory is still 226.5 MB. Free memory was 129.7 MB in the beginning and 126.9 MB in the end (delta: 2.8 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: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: 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: 20.8s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 524 SDtfs, 1946 SDslu, 1229 SDs, 0 SdLazy, 4271 SolverSat, 461 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1529 GetRequests, 1202 SyntacticMatches, 35 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=179occurred in iteration=21, 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, 22 MinimizatonAttempts, 285 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 2383 NumberOfCodeBlocks, 2037 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2344 ConstructedInterpolants, 342 QuantifiedInterpolants, 1217238 SizeOfPredicates, 50 NumberOfNonLiveVariables, 2879 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 39 InterpolantComputations, 8 PerfectInterpolantSequences, 6271/6862 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...