./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.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_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:40:34,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:40:34,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:40:34,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:40:34,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:40:34,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:40:34,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:40:34,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:40:34,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:40:34,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:40:34,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:40:34,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:40:34,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:40:34,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:40:34,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:40:34,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:40:34,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:40:34,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:40:34,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:40:34,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:40:34,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:40:34,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:40:34,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:40:34,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:40:34,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:40:34,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:40:34,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:40:34,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:40:34,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:40:34,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:40:34,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:40:34,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:40:34,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:40:34,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:40:34,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:40:34,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:40:34,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:40:34,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:40:34,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:40:34,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:40:34,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:40:34,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 19:40:34,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:40:34,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:40:34,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:40:34,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:40:34,280 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:40:34,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:40:34,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:40:34,282 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:40:34,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:40:34,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:40:34,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:40:34,284 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 19:40:34,285 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 19:40:34,285 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 19:40:34,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:40:34,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 19:40:34,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:40:34,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:40:34,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:40:34,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:40:34,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:40:34,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:40:34,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:40:34,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:40:34,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:40:34,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:40:34,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:40:34,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:40:34,291 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_8eec6075-0ed2-490b-b48b-0df79f6f9785/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2020-11-29 19:40:34,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:40:34,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:40:34,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:40:34,688 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:40:34,689 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:40:34,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-29 19:40:34,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/data/689d88aee/ec99433d37964f12b1b630db5c226f13/FLAG8590051f9 [2020-11-29 19:40:35,425 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:40:35,425 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-29 19:40:35,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/data/689d88aee/ec99433d37964f12b1b630db5c226f13/FLAG8590051f9 [2020-11-29 19:40:35,803 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/data/689d88aee/ec99433d37964f12b1b630db5c226f13 [2020-11-29 19:40:35,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:40:35,808 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 19:40:35,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:40:35,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:40:35,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:40:35,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:40:35" (1/1) ... [2020-11-29 19:40:35,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5020621a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:35, skipping insertion in model container [2020-11-29 19:40:35,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:40:35" (1/1) ... [2020-11-29 19:40:35,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:40:35,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:40:36,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:40:36,027 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:40:36,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:40:36,101 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:40:36,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36 WrapperNode [2020-11-29 19:40:36,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:40:36,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:40:36,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:40:36,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:40:36,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... [2020-11-29 19:40:36,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... [2020-11-29 19:40:36,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... [2020-11-29 19:40:36,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... [2020-11-29 19:40:36,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... [2020-11-29 19:40:36,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... [2020-11-29 19:40:36,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... [2020-11-29 19:40:36,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:40:36,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:40:36,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:40:36,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:40:36,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:40:36,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 19:40:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:40:36,256 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-29 19:40:36,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 19:40:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-29 19:40:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:40:36,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 19:40:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:40:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:40:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:40:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 19:40:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:40:36,697 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:40:36,697 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-29 19:40:36,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:40:36 BoogieIcfgContainer [2020-11-29 19:40:36,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:40:36,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:40:36,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:40:36,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:40:36,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:40:35" (1/3) ... [2020-11-29 19:40:36,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443f350c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:40:36, skipping insertion in model container [2020-11-29 19:40:36,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:40:36" (2/3) ... [2020-11-29 19:40:36,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443f350c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:40:36, skipping insertion in model container [2020-11-29 19:40:36,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:40:36" (3/3) ... [2020-11-29 19:40:36,712 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2020-11-29 19:40:36,727 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:40:36,732 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-29 19:40:36,747 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-29 19:40:36,773 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:40:36,773 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 19:40:36,774 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:40:36,774 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:40:36,774 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:40:36,774 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:40:36,774 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:40:36,775 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:40:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-29 19:40:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:40:36,804 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:36,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:36,806 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-11-29 19:40:36,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:36,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149994048] [2020-11-29 19:40:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:37,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:37,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149994048] [2020-11-29 19:40:37,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:40:37,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:40:37,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100360703] [2020-11-29 19:40:37,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:40:37,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:40:37,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:40:37,156 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-11-29 19:40:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:37,446 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-29 19:40:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:40:37,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 19:40:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:37,460 INFO L225 Difference]: With dead ends: 58 [2020-11-29 19:40:37,461 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 19:40:37,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:40:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 19:40:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-11-29 19:40:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 19:40:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-11-29 19:40:37,523 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-11-29 19:40:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:37,523 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-11-29 19:40:37,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:40:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-11-29 19:40:37,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:40:37,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:37,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:37,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:40:37,526 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:37,527 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-11-29 19:40:37,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:37,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379131581] [2020-11-29 19:40:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:37,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:37,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379131581] [2020-11-29 19:40:37,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:40:37,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:40:37,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817788615] [2020-11-29 19:40:37,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:40:37,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:40:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:40:37,679 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-11-29 19:40:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:37,944 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-11-29 19:40:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:40:37,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 19:40:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:37,948 INFO L225 Difference]: With dead ends: 49 [2020-11-29 19:40:37,948 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 19:40:37,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:40:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 19:40:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-29 19:40:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 19:40:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-29 19:40:37,957 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-11-29 19:40:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:37,958 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-29 19:40:37,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:40:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-29 19:40:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:40:37,959 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:37,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:37,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:40:37,960 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-11-29 19:40:37,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:37,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440530493] [2020-11-29 19:40:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:38,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:38,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440530493] [2020-11-29 19:40:38,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:40:38,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:40:38,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39461614] [2020-11-29 19:40:38,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:40:38,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:38,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:40:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:40:38,089 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2020-11-29 19:40:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:38,255 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-29 19:40:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:40:38,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-29 19:40:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:38,258 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:40:38,258 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 19:40:38,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:40:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 19:40:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 19:40:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 19:40:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-29 19:40:38,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-11-29 19:40:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:38,266 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-29 19:40:38,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:40:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-29 19:40:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:40:38,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:38,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:38,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:40:38,268 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-11-29 19:40:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:38,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463262140] [2020-11-29 19:40:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:38,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:38,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463262140] [2020-11-29 19:40:38,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:40:38,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:40:38,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92409168] [2020-11-29 19:40:38,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:40:38,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:38,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:40:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:40:38,432 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-11-29 19:40:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:38,677 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-11-29 19:40:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:40:38,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-29 19:40:38,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:38,679 INFO L225 Difference]: With dead ends: 46 [2020-11-29 19:40:38,679 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 19:40:38,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:40:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 19:40:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-11-29 19:40:38,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 19:40:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-29 19:40:38,692 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-11-29 19:40:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:38,693 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-29 19:40:38,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:40:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-29 19:40:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:40:38,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:38,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:38,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:40:38,696 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:38,696 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-11-29 19:40:38,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:38,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411742058] [2020-11-29 19:40:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:38,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:38,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:38,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411742058] [2020-11-29 19:40:38,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:40:38,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:40:38,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213834908] [2020-11-29 19:40:38,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:40:38,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:40:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:40:38,818 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-11-29 19:40:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:39,011 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-11-29 19:40:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:40:39,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-29 19:40:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:39,015 INFO L225 Difference]: With dead ends: 46 [2020-11-29 19:40:39,015 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 19:40:39,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:40:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 19:40:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-11-29 19:40:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 19:40:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-29 19:40:39,021 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2020-11-29 19:40:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:39,022 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-29 19:40:39,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:40:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-29 19:40:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:40:39,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:39,024 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:39,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:40:39,025 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-11-29 19:40:39,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:39,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027914540] [2020-11-29 19:40:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:39,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027914540] [2020-11-29 19:40:39,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795946889] [2020-11-29 19:40:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:40:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:39,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:39,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-11-29 19:40:39,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203207149] [2020-11-29 19:40:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:40:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:40:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:40:39,220 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-11-29 19:40:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:39,439 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-11-29 19:40:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:40:39,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 19:40:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:39,441 INFO L225 Difference]: With dead ends: 52 [2020-11-29 19:40:39,442 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 19:40:39,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:40:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 19:40:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-11-29 19:40:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 19:40:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-29 19:40:39,448 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-11-29 19:40:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:39,448 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-29 19:40:39,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:40:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-29 19:40:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:40:39,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:39,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:39,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:40:39,651 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2020-11-29 19:40:39,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:39,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569865256] [2020-11-29 19:40:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:39,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:40:39,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569865256] [2020-11-29 19:40:39,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:40:39,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:40:39,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444090575] [2020-11-29 19:40:39,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:40:39,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:39,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:40:39,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:40:39,823 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-11-29 19:40:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:40,075 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-11-29 19:40:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:40:40,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-29 19:40:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:40,078 INFO L225 Difference]: With dead ends: 44 [2020-11-29 19:40:40,078 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 19:40:40,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:40:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 19:40:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-29 19:40:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 19:40:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-29 19:40:40,084 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-11-29 19:40:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:40,084 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-29 19:40:40,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:40:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-29 19:40:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:40:40,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:40,086 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] [2020-11-29 19:40:40,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 19:40:40,089 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-11-29 19:40:40,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:40,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438002072] [2020-11-29 19:40:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:40,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:40,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:40,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438002072] [2020-11-29 19:40:40,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072038397] [2020-11-29 19:40:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:40,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:40:40,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:40,482 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-11-29 19:40:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:40,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:40,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-29 19:40:40,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891516396] [2020-11-29 19:40:40,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:40:40,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:40,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:40:40,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:40:40,610 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-11-29 19:40:40,967 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-29 19:40:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:41,186 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-29 19:40:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:40:41,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-29 19:40:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:41,189 INFO L225 Difference]: With dead ends: 50 [2020-11-29 19:40:41,189 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 19:40:41,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:40:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 19:40:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-29 19:40:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 19:40:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-11-29 19:40:41,195 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2020-11-29 19:40:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:41,195 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-11-29 19:40:41,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:40:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-11-29 19:40:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:40:41,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:41,196 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:41,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:41,397 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2020-11-29 19:40:41,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:41,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649770365] [2020-11-29 19:40:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:41,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:41,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649770365] [2020-11-29 19:40:41,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300374912] [2020-11-29 19:40:41,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:41,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:40:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:40:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:40:41,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:41,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-11-29 19:40:41,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126515193] [2020-11-29 19:40:41,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:40:41,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:40:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:40:41,666 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2020-11-29 19:40:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:42,075 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-29 19:40:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:40:42,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-11-29 19:40:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:42,077 INFO L225 Difference]: With dead ends: 58 [2020-11-29 19:40:42,077 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 19:40:42,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:40:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 19:40:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-11-29 19:40:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:40:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-29 19:40:42,083 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2020-11-29 19:40:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:42,084 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-29 19:40:42,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:40:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-29 19:40:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:40:42,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:42,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:42,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:42,299 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2020-11-29 19:40:42,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:42,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738042349] [2020-11-29 19:40:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:42,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:42,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738042349] [2020-11-29 19:40:42,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122940699] [2020-11-29 19:40:42,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:42,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:40:42,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:42,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:40:42,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:42,675 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-29 19:40:42,676 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 [2020-11-29 19:40:42,676 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:42,684 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:42,686 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. [2020-11-29 19:40:42,686 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-29 19:40:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 19:40:42,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:40:42,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-11-29 19:40:42,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714925211] [2020-11-29 19:40:42,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:40:42,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:42,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:40:42,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:40:42,791 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 4 states. [2020-11-29 19:40:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:42,843 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-11-29 19:40:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:40:42,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 19:40:42,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:42,845 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:40:42,845 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 19:40:42,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:40:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 19:40:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 19:40:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 19:40:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-11-29 19:40:42,857 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-11-29 19:40:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:42,858 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-11-29 19:40:42,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:40:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-11-29 19:40:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:40:42,860 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:42,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:43,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:43,067 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:43,069 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2020-11-29 19:40:43,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:43,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868287945] [2020-11-29 19:40:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:43,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:43,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:43,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868287945] [2020-11-29 19:40:43,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441615374] [2020-11-29 19:40:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:40:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:43,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:43,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-29 19:40:43,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498744361] [2020-11-29 19:40:43,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:40:43,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:40:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:40:43,464 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2020-11-29 19:40:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:43,874 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-11-29 19:40:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:40:43,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-11-29 19:40:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:43,876 INFO L225 Difference]: With dead ends: 52 [2020-11-29 19:40:43,876 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 19:40:43,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:40:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 19:40:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-11-29 19:40:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 19:40:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-11-29 19:40:43,882 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2020-11-29 19:40:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:43,887 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-11-29 19:40:43,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:40:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-11-29 19:40:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 19:40:43,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:43,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:44,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-29 19:40:44,111 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2020-11-29 19:40:44,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:44,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306669010] [2020-11-29 19:40:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:44,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:44,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:44,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306669010] [2020-11-29 19:40:44,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117401007] [2020-11-29 19:40:44,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:44,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:40:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:40:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:44,442 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_25|]} [2020-11-29 19:40:44,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:40:44,450 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 [2020-11-29 19:40:44,451 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:44,466 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:40:44,479 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 [2020-11-29 19:40:44,481 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:44,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:44,493 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. [2020-11-29 19:40:44,493 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-11-29 19:40:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 19:40:44,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:40:44,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2020-11-29 19:40:44,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694678223] [2020-11-29 19:40:44,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:40:44,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:40:44,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:40:44,660 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-11-29 19:40:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:44,714 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-29 19:40:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:40:44,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-29 19:40:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:44,715 INFO L225 Difference]: With dead ends: 50 [2020-11-29 19:40:44,715 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:40:44,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:40:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:40:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-11-29 19:40:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 19:40:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-11-29 19:40:44,722 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2020-11-29 19:40:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:44,722 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-11-29 19:40:44,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:40:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-11-29 19:40:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 19:40:44,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:44,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:44,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:44,947 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2020-11-29 19:40:44,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:44,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988900365] [2020-11-29 19:40:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:45,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:45,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 19:40:45,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988900365] [2020-11-29 19:40:45,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63545017] [2020-11-29 19:40:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:45,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:40:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:40:45,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:45,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-11-29 19:40:45,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903610003] [2020-11-29 19:40:45,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:40:45,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:45,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:40:45,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:40:45,257 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-11-29 19:40:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:45,627 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-11-29 19:40:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:40:45,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-11-29 19:40:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:45,629 INFO L225 Difference]: With dead ends: 84 [2020-11-29 19:40:45,629 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 19:40:45,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:40:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 19:40:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-11-29 19:40:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 19:40:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-29 19:40:45,637 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2020-11-29 19:40:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:45,637 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-29 19:40:45,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:40:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-29 19:40:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-29 19:40:45,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:45,640 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:45,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:45,855 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2020-11-29 19:40:45,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:45,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907715954] [2020-11-29 19:40:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:45,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:45,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:46,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-29 19:40:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 19:40:46,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907715954] [2020-11-29 19:40:46,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414462897] [2020-11-29 19:40:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:40:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 19:40:46,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:46,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-11-29 19:40:46,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730775218] [2020-11-29 19:40:46,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:40:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:40:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:40:46,496 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 15 states. [2020-11-29 19:40:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:47,009 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-11-29 19:40:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:40:47,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-11-29 19:40:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:47,011 INFO L225 Difference]: With dead ends: 72 [2020-11-29 19:40:47,011 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 19:40:47,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:40:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 19:40:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-11-29 19:40:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 19:40:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-11-29 19:40:47,016 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2020-11-29 19:40:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:47,017 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-11-29 19:40:47,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:40:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-11-29 19:40:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-29 19:40:47,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:47,020 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:47,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 19:40:47,221 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2020-11-29 19:40:47,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:47,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202084504] [2020-11-29 19:40:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:47,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:47,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:47,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-29 19:40:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-11-29 19:40:47,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202084504] [2020-11-29 19:40:47,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902605872] [2020-11-29 19:40:47,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:47,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:40:47,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:47,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:40:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-29 19:40:47,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:47,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-11-29 19:40:47,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363104893] [2020-11-29 19:40:47,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 19:40:47,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 19:40:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:40:47,879 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 17 states. [2020-11-29 19:40:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:48,486 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-11-29 19:40:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:40:48,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-29 19:40:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:48,488 INFO L225 Difference]: With dead ends: 77 [2020-11-29 19:40:48,488 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 19:40:48,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:40:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 19:40:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-11-29 19:40:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 19:40:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-11-29 19:40:48,494 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2020-11-29 19:40:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:48,503 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-11-29 19:40:48,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 19:40:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-11-29 19:40:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-29 19:40:48,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:48,509 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:48,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 19:40:48,727 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2020-11-29 19:40:48,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:48,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916146034] [2020-11-29 19:40:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:48,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:48,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:49,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-29 19:40:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-29 19:40:49,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916146034] [2020-11-29 19:40:49,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830916990] [2020-11-29 19:40:49,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:49,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 19:40:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:40:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:49,325 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2020-11-29 19:40:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:40:49,336 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 [2020-11-29 19:40:49,336 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:49,350 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:49,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:40:49,357 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 [2020-11-29 19:40:49,358 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:49,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:49,368 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:40:49,369 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-11-29 19:40:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-11-29 19:40:49,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:49,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-11-29 19:40:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143992588] [2020-11-29 19:40:49,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:40:49,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:40:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:40:49,759 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 15 states. [2020-11-29 19:40:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:50,493 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-11-29 19:40:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 19:40:50,494 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2020-11-29 19:40:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:50,495 INFO L225 Difference]: With dead ends: 87 [2020-11-29 19:40:50,495 INFO L226 Difference]: Without dead ends: 84 [2020-11-29 19:40:50,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:40:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-29 19:40:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-11-29 19:40:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 19:40:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-11-29 19:40:50,506 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2020-11-29 19:40:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:50,506 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-11-29 19:40:50,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:40:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-11-29 19:40:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-29 19:40:50,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:50,509 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:50,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 19:40:50,739 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2020-11-29 19:40:50,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:50,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011688072] [2020-11-29 19:40:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:50,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:50,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-29 19:40:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2020-11-29 19:40:50,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011688072] [2020-11-29 19:40:50,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689218566] [2020-11-29 19:40:50,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:51,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:40:51,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:40:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:51,011 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_27|]} [2020-11-29 19:40:51,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:40:51,015 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 [2020-11-29 19:40:51,016 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:51,024 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:51,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:40:51,031 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 [2020-11-29 19:40:51,034 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:51,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:51,041 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. [2020-11-29 19:40:51,041 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-29 19:40:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-11-29 19:40:51,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:40:51,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-11-29 19:40:51,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848221897] [2020-11-29 19:40:51,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:40:51,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:40:51,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:40:51,393 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2020-11-29 19:40:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:51,493 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-11-29 19:40:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:40:51,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-11-29 19:40:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:51,495 INFO L225 Difference]: With dead ends: 79 [2020-11-29 19:40:51,495 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 19:40:51,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:40:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 19:40:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-11-29 19:40:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 19:40:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-11-29 19:40:51,501 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2020-11-29 19:40:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:51,502 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-11-29 19:40:51,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:40:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-11-29 19:40:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-29 19:40:51,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:51,504 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:51,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 19:40:51,705 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2020-11-29 19:40:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:51,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654875673] [2020-11-29 19:40:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:51,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:51,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:52,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-29 19:40:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-11-29 19:40:52,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654875673] [2020-11-29 19:40:52,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147970603] [2020-11-29 19:40:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:52,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:40:52,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-11-29 19:40:52,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:52,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-11-29 19:40:52,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203414167] [2020-11-29 19:40:52,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 19:40:52,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 19:40:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:40:52,663 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 21 states. [2020-11-29 19:40:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:53,511 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-11-29 19:40:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:40:53,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-11-29 19:40:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:53,513 INFO L225 Difference]: With dead ends: 90 [2020-11-29 19:40:53,513 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 19:40:53,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-11-29 19:40:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 19:40:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-11-29 19:40:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 19:40:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-11-29 19:40:53,519 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2020-11-29 19:40:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:53,519 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-11-29 19:40:53,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 19:40:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-11-29 19:40:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-29 19:40:53,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:53,522 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:53,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 19:40:53,735 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:53,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2020-11-29 19:40:53,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:53,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678419370] [2020-11-29 19:40:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:53,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:53,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:54,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-29 19:40:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-11-29 19:40:54,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678419370] [2020-11-29 19:40:54,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942135304] [2020-11-29 19:40:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:54,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 19:40:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:54,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:40:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:54,372 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-29 19:40:54,373 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 [2020-11-29 19:40:54,374 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:54,383 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:54,385 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. [2020-11-29 19:40:54,385 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-29 19:40:54,681 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-11-29 19:40:54,682 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 [2020-11-29 19:40:54,683 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:40:54,692 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:40:54,693 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. [2020-11-29 19:40:54,693 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-11-29 19:40:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-11-29 19:40:55,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:40:55,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2020-11-29 19:40:55,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099766198] [2020-11-29 19:40:55,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:40:55,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:40:55,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:40:55,035 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 6 states. [2020-11-29 19:40:55,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:55,163 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-11-29 19:40:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:40:55,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-11-29 19:40:55,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:55,165 INFO L225 Difference]: With dead ends: 82 [2020-11-29 19:40:55,165 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 19:40:55,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:40:55,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 19:40:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-11-29 19:40:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 19:40:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-11-29 19:40:55,170 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2020-11-29 19:40:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:55,170 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-11-29 19:40:55,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:40:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-11-29 19:40:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-29 19:40:55,172 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:55,172 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:55,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:55,373 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2020-11-29 19:40:55,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:55,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552124552] [2020-11-29 19:40:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:55,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:55,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:55,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-29 19:40:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-29 19:40:55,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552124552] [2020-11-29 19:40:55,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294381288] [2020-11-29 19:40:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:40:56,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-29 19:40:56,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:56,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-11-29 19:40:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889689461] [2020-11-29 19:40:56,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 19:40:56,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 19:40:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:40:56,397 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 23 states. [2020-11-29 19:40:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:57,190 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-11-29 19:40:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:40:57,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-11-29 19:40:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:57,193 INFO L225 Difference]: With dead ends: 88 [2020-11-29 19:40:57,193 INFO L226 Difference]: Without dead ends: 85 [2020-11-29 19:40:57,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:40:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-29 19:40:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-11-29 19:40:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-29 19:40:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-11-29 19:40:57,198 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2020-11-29 19:40:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:57,199 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-11-29 19:40:57,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 19:40:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-11-29 19:40:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-29 19:40:57,201 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:57,201 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:57,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:40:57,415 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:57,415 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2020-11-29 19:40:57,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:57,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568034497] [2020-11-29 19:40:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:57,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:57,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:57,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-11-29 19:40:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-11-29 19:40:57,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568034497] [2020-11-29 19:40:57,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377926308] [2020-11-29 19:40:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:40:58,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:40:58,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:40:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:40:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:40:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-11-29 19:40:58,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:40:58,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-11-29 19:40:58,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274614285] [2020-11-29 19:40:58,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 19:40:58,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:40:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 19:40:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:40:58,461 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 25 states. [2020-11-29 19:40:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:40:59,413 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-11-29 19:40:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 19:40:59,414 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-11-29 19:40:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:40:59,415 INFO L225 Difference]: With dead ends: 93 [2020-11-29 19:40:59,415 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 19:40:59,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 19:40:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 19:40:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-11-29 19:40:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 19:40:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-11-29 19:40:59,422 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2020-11-29 19:40:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:40:59,423 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-11-29 19:40:59,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 19:40:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-11-29 19:40:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-29 19:40:59,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:40:59,425 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:40:59,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 19:40:59,639 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:40:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:40:59,639 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2020-11-29 19:40:59,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:40:59,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333157864] [2020-11-29 19:40:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:40:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:59,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:40:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:40:59,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:40:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:00,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 19:41:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-11-29 19:41:00,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333157864] [2020-11-29 19:41:00,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54863842] [2020-11-29 19:41:00,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:41:00,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 19:41:00,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:41:00,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:41:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:41:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2020-11-29 19:41:00,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:41:00,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2020-11-29 19:41:00,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630643434] [2020-11-29 19:41:00,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 19:41:00,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:41:00,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 19:41:00,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:41:00,605 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-11-29 19:41:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:41:01,760 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-11-29 19:41:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 19:41:01,763 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2020-11-29 19:41:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:41:01,764 INFO L225 Difference]: With dead ends: 109 [2020-11-29 19:41:01,765 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 19:41:01,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 19:41:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 19:41:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2020-11-29 19:41:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 19:41:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-11-29 19:41:01,771 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2020-11-29 19:41:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:41:01,771 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-11-29 19:41:01,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 19:41:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-11-29 19:41:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-11-29 19:41:01,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:41:01,773 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:41:01,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:41:01,974 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:41:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:41:01,975 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2020-11-29 19:41:01,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:41:01,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891429636] [2020-11-29 19:41:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:41:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:02,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:41:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:02,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:41:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:02,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-11-29 19:41:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-11-29 19:41:02,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891429636] [2020-11-29 19:41:02,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149445874] [2020-11-29 19:41:02,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/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 [2020-11-29 19:41:03,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:41:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:41:03,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:41:03,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:41:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-11-29 19:41:03,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:41:03,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-11-29 19:41:03,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906675761] [2020-11-29 19:41:03,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 19:41:03,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:41:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 19:41:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-11-29 19:41:03,572 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 29 states. [2020-11-29 19:41:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:41:04,873 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-11-29 19:41:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:41:04,874 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2020-11-29 19:41:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:41:04,875 INFO L225 Difference]: With dead ends: 107 [2020-11-29 19:41:04,876 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 19:41:04,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 19:41:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 19:41:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-11-29 19:41:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 19:41:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-11-29 19:41:04,882 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2020-11-29 19:41:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:41:04,885 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-11-29 19:41:04,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 19:41:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-11-29 19:41:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-11-29 19:41:04,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:41:04,887 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:41:05,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 19:41:05,103 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:41:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:41:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2020-11-29 19:41:05,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:41:05,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746823958] [2020-11-29 19:41:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:41:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:05,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:41:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:05,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:41:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:05,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-11-29 19:41:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-11-29 19:41:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746823958] [2020-11-29 19:41:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628424566] [2020-11-29 19:41:05,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:41:06,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-29 19:41:06,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:41:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 19:41:06,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:41:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-11-29 19:41:06,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:41:06,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-11-29 19:41:06,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645797217] [2020-11-29 19:41:06,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-29 19:41:06,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:41:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-29 19:41:06,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-11-29 19:41:06,696 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 31 states. [2020-11-29 19:41:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:41:07,844 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-11-29 19:41:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 19:41:07,844 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2020-11-29 19:41:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:41:07,846 INFO L225 Difference]: With dead ends: 112 [2020-11-29 19:41:07,846 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 19:41:07,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 19:41:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 19:41:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-11-29 19:41:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-29 19:41:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-11-29 19:41:07,856 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2020-11-29 19:41:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:41:07,856 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-11-29 19:41:07,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-29 19:41:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-11-29 19:41:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-11-29 19:41:07,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:41:07,859 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:41:08,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 19:41:08,083 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 19:41:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:41:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2020-11-29 19:41:08,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:41:08,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418919427] [2020-11-29 19:41:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:41:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:08,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:41:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:08,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 19:41:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:08,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-11-29 19:41:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-11-29 19:41:09,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418919427] [2020-11-29 19:41:09,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336962589] [2020-11-29 19:41:09,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:41:09,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-29 19:41:09,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:41:09,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:41:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:41:09,095 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_30|]} [2020-11-29 19:41:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:41:09,115 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 [2020-11-29 19:41:09,116 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:41:09,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:41:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 19:41:09,151 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 [2020-11-29 19:41:09,152 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:41:09,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:41:09,166 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. [2020-11-29 19:41:09,166 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-11-29 19:41:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2020-11-29 19:41:09,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:41:09,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2020-11-29 19:41:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403083729] [2020-11-29 19:41:09,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:41:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:41:09,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:41:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:41:09,791 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 7 states. [2020-11-29 19:41:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:41:09,891 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-11-29 19:41:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:41:09,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-11-29 19:41:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:41:09,893 INFO L225 Difference]: With dead ends: 103 [2020-11-29 19:41:09,893 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:41:09,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:41:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:41:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:41:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:41:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:41:09,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2020-11-29 19:41:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:41:09,894 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:41:09,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:41:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:41:09,895 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:41:10,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 19:41:10,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:41:10 BoogieIcfgContainer [2020-11-29 19:41:10,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:41:10,101 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:41:10,101 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:41:10,101 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:41:10,101 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:40:36" (3/4) ... [2020-11-29 19:41:10,106 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:41:10,116 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 19:41:10,116 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-11-29 19:41:10,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 19:41:10,126 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-29 19:41:10,126 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-29 19:41:10,126 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-29 19:41:10,127 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:41:10,180 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8eec6075-0ed2-490b-b48b-0df79f6f9785/bin/uautomizer/witness.graphml [2020-11-29 19:41:10,180 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:41:10,182 INFO L168 Benchmark]: Toolchain (without parser) took 34373.48 ms. Allocated memory was 96.5 MB in the beginning and 299.9 MB in the end (delta: 203.4 MB). Free memory was 64.6 MB in the beginning and 121.9 MB in the end (delta: -57.3 MB). Peak memory consumption was 145.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:10,182 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 96.5 MB. Free memory was 56.2 MB in the beginning and 56.1 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:41:10,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.05 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 64.6 MB in the beginning and 94.7 MB in the end (delta: -30.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:10,184 INFO L168 Benchmark]: Boogie Preprocessor took 56.17 ms. Allocated memory is still 117.4 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:41:10,184 INFO L168 Benchmark]: RCFGBuilder took 536.86 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 77.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:10,185 INFO L168 Benchmark]: TraceAbstraction took 33397.81 ms. Allocated memory was 117.4 MB in the beginning and 299.9 MB in the end (delta: 182.5 MB). Free memory was 76.9 MB in the beginning and 124.7 MB in the end (delta: -47.8 MB). Peak memory consumption was 137.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:10,185 INFO L168 Benchmark]: Witness Printer took 79.97 ms. Allocated memory is still 299.9 MB. Free memory was 123.7 MB in the beginning and 121.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:10,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 96.5 MB. Free memory was 56.2 MB in the beginning and 56.1 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.05 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 64.6 MB in the beginning and 94.7 MB in the end (delta: -30.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.17 ms. Allocated memory is still 117.4 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 536.86 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 77.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 33397.81 ms. Allocated memory was 117.4 MB in the beginning and 299.9 MB in the end (delta: 182.5 MB). Free memory was 76.9 MB in the beginning and 124.7 MB in the end (delta: -47.8 MB). Peak memory consumption was 137.9 MB. Max. memory is 16.1 GB. * Witness Printer took 79.97 ms. Allocated memory is still 299.9 MB. Free memory was 123.7 MB in the beginning and 121.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: 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: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - 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: 33.3s, OverallIterations: 25, TraceHistogramMax: 26, AutomataDifference: 12.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 621 SDtfs, 1816 SDslu, 3405 SDs, 0 SdLazy, 3377 SolverSat, 267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1980 GetRequests, 1548 SyntacticMatches, 14 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, 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, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 14.1s InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 2351984 SizeOfPredicates, 31 NumberOfNonLiveVariables, 3127 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10777/18637 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...