./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 76e89a58b9c6f7059fcf416ee7a1666558a3d440 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:20:25,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:20:25,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:20:25,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:20:25,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:20:25,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:20:25,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:20:25,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:20:25,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:20:25,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:20:25,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:20:25,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:20:25,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:20:25,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:20:25,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:20:25,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:20:25,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:20:25,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:20:25,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:20:25,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:20:25,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:20:25,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:20:25,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:20:25,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:20:25,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:20:25,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:20:25,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:20:25,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:20:25,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:20:25,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:20:25,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:20:25,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:20:25,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:20:25,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:20:25,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:20:25,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:20:25,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:20:25,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:20:25,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:20:25,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:20:25,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:20:25,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-11-28 03:20:25,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:20:25,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:20:25,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:20:25,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:20:25,213 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:20:25,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:20:25,213 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:20:25,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:20:25,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:20:25,214 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:20:25,215 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:20:25,215 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:20:25,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:20:25,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:20:25,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:20:25,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:20:25,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:20:25,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:20:25,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:20:25,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:20:25,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:20:25,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:20:25,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:20:25,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:20:25,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:20:25,218 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_d7856cd0-cc41-4d69-bdb9-c6ede393d501/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2020-11-28 03:20:25,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:20:25,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:20:25,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:20:25,531 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:20:25,532 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:20:25,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-11-28 03:20:25,603 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/data/5e0968078/e44dde5c9fc645668c83639f8914a27a/FLAG41dc1382e [2020-11-28 03:20:26,052 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:20:26,053 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-11-28 03:20:26,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/data/5e0968078/e44dde5c9fc645668c83639f8914a27a/FLAG41dc1382e [2020-11-28 03:20:26,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/data/5e0968078/e44dde5c9fc645668c83639f8914a27a [2020-11-28 03:20:26,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:20:26,448 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:20:26,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:26,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:20:26,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:20:26,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e88a262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26, skipping insertion in model container [2020-11-28 03:20:26,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:20:26,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:20:26,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:26,653 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:20:26,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:26,681 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:20:26,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26 WrapperNode [2020-11-28 03:20:26,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:26,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:20:26,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:20:26,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:20:26,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... [2020-11-28 03:20:26,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:20:26,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:20:26,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:20:26,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:20:26,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:20:26,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:20:26,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:20:26,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:20:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:20:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:20:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:20:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:20:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:20:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:20:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:20:26,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:20:27,077 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:20:27,077 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-28 03:20:27,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:27 BoogieIcfgContainer [2020-11-28 03:20:27,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:20:27,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:20:27,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:20:27,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:20:27,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:20:26" (1/3) ... [2020-11-28 03:20:27,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8989fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:20:27, skipping insertion in model container [2020-11-28 03:20:27,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:26" (2/3) ... [2020-11-28 03:20:27,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8989fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:20:27, skipping insertion in model container [2020-11-28 03:20:27,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:27" (3/3) ... [2020-11-28 03:20:27,110 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2020-11-28 03:20:27,128 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:20:27,135 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 03:20:27,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 03:20:27,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:20:27,166 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:20:27,166 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:20:27,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:20:27,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:20:27,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:20:27,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:20:27,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:20:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-28 03:20:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:20:27,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:27,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:27,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:27,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763092, now seen corresponding path program 1 times [2020-11-28 03:20:27,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:27,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290790543] [2020-11-28 03:20:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:27,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290790543] [2020-11-28 03:20:27,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:27,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:20:27,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863330688] [2020-11-28 03:20:27,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:27,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:27,452 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-11-28 03:20:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:27,611 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-28 03:20:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:27,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 03:20:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:27,633 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:20:27,633 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:20:27,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:20:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-11-28 03:20:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:20:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-28 03:20:27,670 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 8 [2020-11-28 03:20:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:27,671 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-28 03:20:27,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-28 03:20:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:20:27,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:27,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:27,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:20:27,672 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763091, now seen corresponding path program 1 times [2020-11-28 03:20:27,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:27,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301137861] [2020-11-28 03:20:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:27,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:27,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301137861] [2020-11-28 03:20:27,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:27,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:20:27,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324311915] [2020-11-28 03:20:27,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:27,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:27,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:27,744 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-11-28 03:20:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:27,818 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-28 03:20:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:27,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 03:20:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:27,819 INFO L225 Difference]: With dead ends: 24 [2020-11-28 03:20:27,819 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 03:20:27,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 03:20:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 03:20:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:20:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-28 03:20:27,824 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2020-11-28 03:20:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:27,825 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-28 03:20:27,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-28 03:20:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:20:27,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:27,826 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:27,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:20:27,826 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash 707835031, now seen corresponding path program 1 times [2020-11-28 03:20:27,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:27,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805783964] [2020-11-28 03:20:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:27,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:27,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805783964] [2020-11-28 03:20:27,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753451492] [2020-11-28 03:20:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:28,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:20:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:28,124 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:20:28,125 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:20:28,133 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:20:28,133 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:20:28,134 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 03:20:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:28,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:28,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-11-28 03:20:28,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904326543] [2020-11-28 03:20:28,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:20:28,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:20:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:20:28,159 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-11-28 03:20:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:28,283 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-28 03:20:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:20:28,285 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-28 03:20:28,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:28,286 INFO L225 Difference]: With dead ends: 30 [2020-11-28 03:20:28,286 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:20:28,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:20:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:20:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-28 03:20:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:20:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-28 03:20:28,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 12 [2020-11-28 03:20:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:28,293 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-28 03:20:28,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:20:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-28 03:20:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:20:28,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:28,296 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:28,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:20:28,497 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 671779276, now seen corresponding path program 1 times [2020-11-28 03:20:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:28,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745220517] [2020-11-28 03:20:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:28,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 03:20:28,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745220517] [2020-11-28 03:20:28,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:28,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:20:28,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772827373] [2020-11-28 03:20:28,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:20:28,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:28,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:20:28,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:20:28,618 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-11-28 03:20:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:28,740 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-11-28 03:20:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:20:28,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-28 03:20:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:28,742 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:20:28,742 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 03:20:28,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:20:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 03:20:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-11-28 03:20:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 03:20:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-28 03:20:28,747 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-11-28 03:20:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:28,748 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-28 03:20:28,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:20:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-28 03:20:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:20:28,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:28,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:28,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:20:28,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:28,750 INFO L82 PathProgramCache]: Analyzing trace with hash -649672835, now seen corresponding path program 1 times [2020-11-28 03:20:28,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:28,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812874745] [2020-11-28 03:20:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:28,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 03:20:28,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812874745] [2020-11-28 03:20:28,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:28,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:20:28,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717597851] [2020-11-28 03:20:28,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:20:28,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:28,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:20:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:28,826 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-11-28 03:20:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:28,883 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-28 03:20:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:20:28,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-28 03:20:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:28,885 INFO L225 Difference]: With dead ends: 30 [2020-11-28 03:20:28,885 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:20:28,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:20:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:20:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-28 03:20:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:20:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-28 03:20:28,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-11-28 03:20:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:28,890 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-28 03:20:28,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:20:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-28 03:20:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:20:28,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:28,891 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:28,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:20:28,895 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1334976847, now seen corresponding path program 1 times [2020-11-28 03:20:28,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:28,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668446502] [2020-11-28 03:20:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:28,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:28,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668446502] [2020-11-28 03:20:28,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870434209] [2020-11-28 03:20:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:29,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:20:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:29,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:29,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-28 03:20:29,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702920013] [2020-11-28 03:20:29,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:20:29,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:20:29,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:20:29,080 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-11-28 03:20:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:29,163 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-11-28 03:20:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:20:29,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-11-28 03:20:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:29,165 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:20:29,165 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:20:29,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:20:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:20:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-28 03:20:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 03:20:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-28 03:20:29,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2020-11-28 03:20:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:29,170 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-28 03:20:29,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:20:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-28 03:20:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:20:29,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:29,172 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:29,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:29,394 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1360643474, now seen corresponding path program 2 times [2020-11-28 03:20:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:29,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823127568] [2020-11-28 03:20:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:29,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:29,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823127568] [2020-11-28 03:20:29,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099329655] [2020-11-28 03:20:29,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:29,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:20:29,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:20:29,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-28 03:20:29,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:20:29,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-11-28 03:20:29,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659693605] [2020-11-28 03:20:29,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:20:29,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:20:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:20:29,607 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-11-28 03:20:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:29,645 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-28 03:20:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:20:29,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-11-28 03:20:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:29,647 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:20:29,647 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:20:29,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:20:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:20:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-28 03:20:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:20:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-28 03:20:29,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2020-11-28 03:20:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:29,651 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-28 03:20:29,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:20:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-28 03:20:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 03:20:29,652 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:29,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:29,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:29,872 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -775549161, now seen corresponding path program 1 times [2020-11-28 03:20:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:29,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014438588] [2020-11-28 03:20:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:29,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:29,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014438588] [2020-11-28 03:20:29,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366420419] [2020-11-28 03:20:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:30,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:20:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:30,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:30,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-28 03:20:30,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906550064] [2020-11-28 03:20:30,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:20:30,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:30,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:20:30,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:20:30,070 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-11-28 03:20:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:30,155 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-28 03:20:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:20:30,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-11-28 03:20:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:30,158 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:20:30,158 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:20:30,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:20:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:20:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-28 03:20:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 03:20:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-11-28 03:20:30,163 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-11-28 03:20:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:30,163 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-11-28 03:20:30,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:20:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-11-28 03:20:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:20:30,164 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:30,164 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:30,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:30,365 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:30,366 INFO L82 PathProgramCache]: Analyzing trace with hash -105276236, now seen corresponding path program 2 times [2020-11-28 03:20:30,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:30,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963814306] [2020-11-28 03:20:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:30,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:30,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963814306] [2020-11-28 03:20:30,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564076431] [2020-11-28 03:20:30,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:30,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:20:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:30,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:20:30,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:30,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:30,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-28 03:20:30,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659385502] [2020-11-28 03:20:30,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:20:30,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:30,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:20:30,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:20:30,610 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2020-11-28 03:20:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:30,696 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-11-28 03:20:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:20:30,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-11-28 03:20:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:30,697 INFO L225 Difference]: With dead ends: 41 [2020-11-28 03:20:30,697 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:20:30,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:20:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:20:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-11-28 03:20:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 03:20:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-28 03:20:30,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-11-28 03:20:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:30,702 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-28 03:20:30,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:20:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-28 03:20:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 03:20:30,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:30,703 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:30,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:30,916 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1144843311, now seen corresponding path program 3 times [2020-11-28 03:20:30,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:30,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105789616] [2020-11-28 03:20:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:31,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105789616] [2020-11-28 03:20:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785642317] [2020-11-28 03:20:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:31,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-28 03:20:31,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:20:31,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:31,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:31,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-28 03:20:31,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047461102] [2020-11-28 03:20:31,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:20:31,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:20:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:20:31,201 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-11-28 03:20:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:31,292 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-11-28 03:20:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:20:31,293 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-11-28 03:20:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:31,293 INFO L225 Difference]: With dead ends: 45 [2020-11-28 03:20:31,293 INFO L226 Difference]: Without dead ends: 45 [2020-11-28 03:20:31,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:20:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-28 03:20:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-11-28 03:20:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:20:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-28 03:20:31,297 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-11-28 03:20:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:31,298 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-28 03:20:31,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:20:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-28 03:20:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-28 03:20:31,299 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:31,299 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:31,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:31,512 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash -539904914, now seen corresponding path program 4 times [2020-11-28 03:20:31,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:31,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249965555] [2020-11-28 03:20:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:31,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:31,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249965555] [2020-11-28 03:20:31,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103786401] [2020-11-28 03:20:31,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:31,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:20:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:31,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:20:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:31,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:31,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-28 03:20:31,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653702252] [2020-11-28 03:20:31,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:20:31,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:20:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:20:31,756 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2020-11-28 03:20:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:31,838 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-28 03:20:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:20:31,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-11-28 03:20:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:31,840 INFO L225 Difference]: With dead ends: 49 [2020-11-28 03:20:31,840 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 03:20:31,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:20:31,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 03:20:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-11-28 03:20:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-28 03:20:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-11-28 03:20:31,844 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-11-28 03:20:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:31,844 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-11-28 03:20:31,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:20:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-11-28 03:20:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-28 03:20:31,846 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:31,846 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:32,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:32,056 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:32,056 INFO L82 PathProgramCache]: Analyzing trace with hash 607436427, now seen corresponding path program 5 times [2020-11-28 03:20:32,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:32,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372037006] [2020-11-28 03:20:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:32,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:32,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372037006] [2020-11-28 03:20:32,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434606415] [2020-11-28 03:20:32,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:32,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-28 03:20:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:20:32,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:32,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:32,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-28 03:20:32,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303741271] [2020-11-28 03:20:32,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:20:32,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:32,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:20:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:20:32,350 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-11-28 03:20:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:32,441 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-11-28 03:20:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:20:32,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-11-28 03:20:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:32,442 INFO L225 Difference]: With dead ends: 53 [2020-11-28 03:20:32,442 INFO L226 Difference]: Without dead ends: 53 [2020-11-28 03:20:32,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:20:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-28 03:20:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-11-28 03:20:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-28 03:20:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-11-28 03:20:32,447 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2020-11-28 03:20:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:32,447 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-11-28 03:20:32,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:20:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-11-28 03:20:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-28 03:20:32,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:32,449 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:32,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 03:20:32,650 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash 228291112, now seen corresponding path program 6 times [2020-11-28 03:20:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:32,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795485605] [2020-11-28 03:20:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:32,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:20:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:32,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795485605] [2020-11-28 03:20:32,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706305655] [2020-11-28 03:20:32,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:32,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-28 03:20:32,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:20:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:20:32,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:32,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:32,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-11-28 03:20:32,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546484276] [2020-11-28 03:20:32,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:20:32,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:20:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:20:32,966 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2020-11-28 03:20:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:33,070 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-11-28 03:20:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:20:33,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-11-28 03:20:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:20:33,072 INFO L225 Difference]: With dead ends: 54 [2020-11-28 03:20:33,072 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 03:20:33,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:20:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 03:20:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-28 03:20:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:20:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-11-28 03:20:33,082 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-11-28 03:20:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:20:33,082 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-11-28 03:20:33,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:20:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-11-28 03:20:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-28 03:20:33,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:20:33,084 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:33,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:33,285 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-11-28 03:20:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1223356603, now seen corresponding path program 7 times [2020-11-28 03:20:33,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:33,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283459832] [2020-11-28 03:20:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:33,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:33,358 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:33,393 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:33,393 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:20:33,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:20:33,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:20:33 BoogieIcfgContainer [2020-11-28 03:20:33,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:20:33,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:20:33,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:20:33,448 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:20:33,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:27" (3/4) ... [2020-11-28 03:20:33,450 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:20:33,499 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d7856cd0-cc41-4d69-bdb9-c6ede393d501/bin/uautomizer/witness.graphml [2020-11-28 03:20:33,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:20:33,501 INFO L168 Benchmark]: Toolchain (without parser) took 7052.12 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 62.6 MB in the beginning and 91.9 MB in the end (delta: -29.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:33,502 INFO L168 Benchmark]: CDTParser took 0.63 ms. Allocated memory is still 92.3 MB. Free memory was 50.0 MB in the beginning and 49.9 MB in the end (delta: 43.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:20:33,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.36 ms. Allocated memory is still 92.3 MB. Free memory was 62.4 MB in the beginning and 70.2 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:33,507 INFO L168 Benchmark]: Boogie Preprocessor took 26.67 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:20:33,508 INFO L168 Benchmark]: RCFGBuilder took 376.86 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 55.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:33,508 INFO L168 Benchmark]: TraceAbstraction took 6359.21 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 55.2 MB in the beginning and 95.0 MB in the end (delta: -39.8 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:33,509 INFO L168 Benchmark]: Witness Printer took 51.72 ms. Allocated memory is still 134.2 MB. Free memory was 94.0 MB in the beginning and 91.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:20:33,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63 ms. Allocated memory is still 92.3 MB. Free memory was 50.0 MB in the beginning and 49.9 MB in the end (delta: 43.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 230.36 ms. Allocated memory is still 92.3 MB. Free memory was 62.4 MB in the beginning and 70.2 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.67 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 376.86 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 55.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6359.21 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 55.2 MB in the beginning and 95.0 MB in the end (delta: -39.8 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Witness Printer took 51.72 ms. Allocated memory is still 134.2 MB. Free memory was 94.0 MB in the beginning and 91.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; VAL [a={2:0}, i=0, n=0] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, a={2:0}, i=0, n=0] [L13] ++n VAL [a={2:0}, i=0, n=1] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, a={2:0}, i=0, n=1] [L13] ++n VAL [a={2:0}, i=0, n=2] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=3, a={2:0}, i=0, n=2] [L13] ++n VAL [a={2:0}, i=0, n=3] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, a={2:0}, i=0, n=3] [L13] ++n VAL [a={2:0}, i=0, n=4] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-4, a={2:0}, i=0, n=4] [L13] ++n VAL [a={2:0}, i=0, n=5] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=5, a={2:0}, i=0, n=5] [L13] ++n VAL [a={2:0}, i=0, n=6] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-5, a={2:0}, i=0, n=6] [L13] ++n VAL [a={2:0}, i=0, n=7] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=6, a={2:0}, i=0, n=7] [L13] ++n VAL [a={2:0}, i=0, n=8] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-6, a={2:0}, i=0, n=8] [L13] ++n VAL [a={2:0}, i=0, n=9] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=7, a={2:0}, i=0, n=9] [L13] ++n VAL [a={2:0}, i=0, n=10] [L13] COND FALSE !(n < 10) VAL [a={2:0}, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, i=0, n=10] [L17] EXPR a[i] VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=9, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=9, i=0, n=10] [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 195 SDtfs, 208 SDslu, 581 SDs, 0 SdLazy, 608 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 401 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 25 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 710 NumberOfCodeBlocks, 694 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 635 ConstructedInterpolants, 1 QuantifiedInterpolants, 63976 SizeOfPredicates, 7 NumberOfNonLiveVariables, 967 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 58/1126 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 incorrect! Received shutdown request...