./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max.c -s /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b909735efeb9bc00b7df4035956af92a753b9076 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:25:19,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:25:19,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:25:20,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:25:20,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:25:20,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:25:20,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:25:20,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:25:20,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:25:20,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:25:20,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:25:20,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:25:20,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:25:20,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:25:20,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:25:20,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:25:20,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:25:20,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:25:20,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:25:20,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:25:20,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:25:20,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:25:20,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:25:20,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:25:20,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:25:20,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:25:20,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:25:20,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:25:20,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:25:20,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:25:20,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:25:20,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:25:20,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:25:20,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:25:20,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:25:20,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:25:20,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:25:20,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:25:20,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:25:20,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:25:20,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:25:20,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 21:25:20,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:25:20,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:25:20,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:25:20,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:25:20,157 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:25:20,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:25:20,158 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:25:20,158 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:25:20,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:25:20,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:25:20,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:25:20,160 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 21:25:20,160 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 21:25:20,160 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 21:25:20,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:25:20,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 21:25:20,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:25:20,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:25:20,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:25:20,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:25:20,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:25:20,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:25:20,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:25:20,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:25:20,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:25:20,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:25:20,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:25:20,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:25:20,163 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_51692ab4-3b75-4230-819e-1502c713e793/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b909735efeb9bc00b7df4035956af92a753b9076 [2020-11-29 21:25:20,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:25:20,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:25:20,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:25:20,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:25:20,445 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:25:20,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max.c [2020-11-29 21:25:20,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/data/fd6043944/86ab701b49f5481c9acde7e81c6b392a/FLAGdde2b75a3 [2020-11-29 21:25:21,075 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:25:21,078 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/sv-benchmarks/c/verifythis/elimination_max.c [2020-11-29 21:25:21,085 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/data/fd6043944/86ab701b49f5481c9acde7e81c6b392a/FLAGdde2b75a3 [2020-11-29 21:25:21,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/data/fd6043944/86ab701b49f5481c9acde7e81c6b392a [2020-11-29 21:25:21,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:25:21,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 21:25:21,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:25:21,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:25:21,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:25:21,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45be758d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21, skipping insertion in model container [2020-11-29 21:25:21,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:25:21,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:25:21,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:25:21,705 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:25:21,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:25:21,771 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:25:21,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21 WrapperNode [2020-11-29 21:25:21,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:25:21,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:25:21,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:25:21,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:25:21,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... [2020-11-29 21:25:21,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:25:21,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:25:21,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:25:21,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:25:21,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:25:21,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 21:25:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:25:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 21:25:21,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-29 21:25:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-29 21:25:21,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 21:25:21,923 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-11-29 21:25:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 21:25:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 21:25:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 21:25:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 21:25:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 21:25:21,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:25:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-29 21:25:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-29 21:25:21,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 21:25:21,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 21:25:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 21:25:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-11-29 21:25:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 21:25:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 21:25:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 21:25:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:25:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:25:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 21:25:22,374 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:25:22,374 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-29 21:25:22,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:25:22 BoogieIcfgContainer [2020-11-29 21:25:22,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:25:22,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:25:22,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:25:22,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:25:22,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:25:21" (1/3) ... [2020-11-29 21:25:22,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396de17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:25:22, skipping insertion in model container [2020-11-29 21:25:22,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:25:21" (2/3) ... [2020-11-29 21:25:22,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396de17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:25:22, skipping insertion in model container [2020-11-29 21:25:22,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:25:22" (3/3) ... [2020-11-29 21:25:22,385 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2020-11-29 21:25:22,396 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:25:22,401 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-11-29 21:25:22,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-11-29 21:25:22,434 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:25:22,434 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 21:25:22,434 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:25:22,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:25:22,434 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:25:22,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:25:22,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:25:22,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:25:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-11-29 21:25:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 21:25:22,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:22,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:22,458 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1105579330, now seen corresponding path program 1 times [2020-11-29 21:25:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:22,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692065762] [2020-11-29 21:25:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:22,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:22,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:22,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:22,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692065762] [2020-11-29 21:25:22,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:22,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:25:22,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658226344] [2020-11-29 21:25:22,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:25:22,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:25:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:25:22,746 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 4 states. [2020-11-29 21:25:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:23,021 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-11-29 21:25:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:25:23,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-29 21:25:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:23,033 INFO L225 Difference]: With dead ends: 63 [2020-11-29 21:25:23,033 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 21:25:23,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:25:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 21:25:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-29 21:25:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 21:25:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-11-29 21:25:23,084 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 19 [2020-11-29 21:25:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:23,086 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-11-29 21:25:23,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:25:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-11-29 21:25:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 21:25:23,088 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:23,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:23,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:25:23,089 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash -404514752, now seen corresponding path program 1 times [2020-11-29 21:25:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:23,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589490097] [2020-11-29 21:25:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:23,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589490097] [2020-11-29 21:25:23,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:23,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:25:23,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721624412] [2020-11-29 21:25:23,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:25:23,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:23,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:25:23,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:25:23,299 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 6 states. [2020-11-29 21:25:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:23,631 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-11-29 21:25:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:25:23,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-29 21:25:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:23,633 INFO L225 Difference]: With dead ends: 53 [2020-11-29 21:25:23,634 INFO L226 Difference]: Without dead ends: 53 [2020-11-29 21:25:23,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:25:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-29 21:25:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-29 21:25:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 21:25:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-11-29 21:25:23,649 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 19 [2020-11-29 21:25:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:23,651 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-11-29 21:25:23,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:25:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-11-29 21:25:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 21:25:23,653 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:23,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:23,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:25:23,655 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash -404514751, now seen corresponding path program 1 times [2020-11-29 21:25:23,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:23,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405587237] [2020-11-29 21:25:23,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:23,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405587237] [2020-11-29 21:25:23,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:23,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 21:25:23,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860878356] [2020-11-29 21:25:23,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:25:23,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:23,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:25:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:25:23,860 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 7 states. [2020-11-29 21:25:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:24,399 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-11-29 21:25:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 21:25:24,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-29 21:25:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:24,402 INFO L225 Difference]: With dead ends: 101 [2020-11-29 21:25:24,402 INFO L226 Difference]: Without dead ends: 101 [2020-11-29 21:25:24,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:25:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-29 21:25:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-11-29 21:25:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 21:25:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-11-29 21:25:24,425 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 19 [2020-11-29 21:25:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:24,426 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-11-29 21:25:24,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:25:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-11-29 21:25:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 21:25:24,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:24,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:24,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:25:24,429 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:24,430 INFO L82 PathProgramCache]: Analyzing trace with hash 344944575, now seen corresponding path program 1 times [2020-11-29 21:25:24,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:24,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602608517] [2020-11-29 21:25:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:24,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:24,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:24,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:24,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602608517] [2020-11-29 21:25:24,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:24,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 21:25:24,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930707550] [2020-11-29 21:25:24,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:25:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:25:24,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:25:24,647 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 7 states. [2020-11-29 21:25:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:25,230 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-11-29 21:25:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 21:25:25,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-11-29 21:25:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:25,232 INFO L225 Difference]: With dead ends: 119 [2020-11-29 21:25:25,233 INFO L226 Difference]: Without dead ends: 119 [2020-11-29 21:25:25,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 21:25:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-29 21:25:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-11-29 21:25:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 21:25:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-11-29 21:25:25,245 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 20 [2020-11-29 21:25:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:25,245 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-11-29 21:25:25,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:25:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-11-29 21:25:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 21:25:25,246 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:25,247 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:25,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 21:25:25,247 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:25,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1612932601, now seen corresponding path program 1 times [2020-11-29 21:25:25,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:25,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254768616] [2020-11-29 21:25:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:25,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:25,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:25,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:25,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254768616] [2020-11-29 21:25:25,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741585128] [2020-11-29 21:25:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:25:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:25:25,691 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-11-29 21:25:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:25,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:25:25,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2020-11-29 21:25:25,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059051075] [2020-11-29 21:25:25,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:25:25,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:25:25,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-29 21:25:25,848 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 7 states. [2020-11-29 21:25:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:26,241 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2020-11-29 21:25:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:25:26,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-11-29 21:25:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:26,249 INFO L225 Difference]: With dead ends: 140 [2020-11-29 21:25:26,249 INFO L226 Difference]: Without dead ends: 140 [2020-11-29 21:25:26,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-29 21:25:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-29 21:25:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-11-29 21:25:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 21:25:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2020-11-29 21:25:26,275 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 23 [2020-11-29 21:25:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:26,279 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2020-11-29 21:25:26,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:25:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2020-11-29 21:25:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 21:25:26,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:26,281 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:26,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:26,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash -569899624, now seen corresponding path program 1 times [2020-11-29 21:25:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:26,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903613875] [2020-11-29 21:25:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:26,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:26,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:26,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-29 21:25:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:25:26,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903613875] [2020-11-29 21:25:26,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:26,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 21:25:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563236224] [2020-11-29 21:25:26,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 21:25:26,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 21:25:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:25:26,719 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand 9 states. [2020-11-29 21:25:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:27,157 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-11-29 21:25:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 21:25:27,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-11-29 21:25:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:27,160 INFO L225 Difference]: With dead ends: 105 [2020-11-29 21:25:27,160 INFO L226 Difference]: Without dead ends: 105 [2020-11-29 21:25:27,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-29 21:25:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-29 21:25:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2020-11-29 21:25:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 21:25:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-11-29 21:25:27,177 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 25 [2020-11-29 21:25:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:27,177 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-11-29 21:25:27,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 21:25:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-11-29 21:25:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 21:25:27,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:27,179 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:27,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 21:25:27,180 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -487019175, now seen corresponding path program 1 times [2020-11-29 21:25:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:27,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141442442] [2020-11-29 21:25:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-29 21:25:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:25:27,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141442442] [2020-11-29 21:25:27,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:27,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 21:25:27,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144028957] [2020-11-29 21:25:27,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:25:27,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:25:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:25:27,302 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 7 states. [2020-11-29 21:25:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:27,556 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2020-11-29 21:25:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 21:25:27,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-29 21:25:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:27,557 INFO L225 Difference]: With dead ends: 112 [2020-11-29 21:25:27,558 INFO L226 Difference]: Without dead ends: 112 [2020-11-29 21:25:27,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:25:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-29 21:25:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 75. [2020-11-29 21:25:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 21:25:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-11-29 21:25:27,565 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 26 [2020-11-29 21:25:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:27,565 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-11-29 21:25:27,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:25:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-11-29 21:25:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 21:25:27,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:27,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:27,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 21:25:27,567 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash 145092996, now seen corresponding path program 1 times [2020-11-29 21:25:27,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:27,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300024890] [2020-11-29 21:25:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-29 21:25:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:25:27,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300024890] [2020-11-29 21:25:27,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:27,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 21:25:27,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780499513] [2020-11-29 21:25:27,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 21:25:27,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 21:25:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:25:27,765 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 11 states. [2020-11-29 21:25:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:28,244 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-11-29 21:25:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 21:25:28,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-11-29 21:25:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:28,245 INFO L225 Difference]: With dead ends: 79 [2020-11-29 21:25:28,246 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 21:25:28,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-11-29 21:25:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 21:25:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-29 21:25:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 21:25:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-11-29 21:25:28,260 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 31 [2020-11-29 21:25:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:28,260 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-11-29 21:25:28,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 21:25:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-11-29 21:25:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 21:25:28,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:28,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:28,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 21:25:28,262 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1105806991, now seen corresponding path program 1 times [2020-11-29 21:25:28,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:28,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006073185] [2020-11-29 21:25:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:28,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:28,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:28,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:25:28,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006073185] [2020-11-29 21:25:28,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972669831] [2020-11-29 21:25:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:28,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:25:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:25:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:28,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:25:28,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2020-11-29 21:25:28,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947981678] [2020-11-29 21:25:28,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 21:25:28,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:28,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 21:25:28,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-11-29 21:25:28,669 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 15 states. [2020-11-29 21:25:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:29,407 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-11-29 21:25:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 21:25:29,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-11-29 21:25:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:29,409 INFO L225 Difference]: With dead ends: 80 [2020-11-29 21:25:29,409 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 21:25:29,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-11-29 21:25:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 21:25:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-11-29 21:25:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 21:25:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-11-29 21:25:29,415 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 28 [2020-11-29 21:25:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:29,415 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-11-29 21:25:29,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 21:25:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-11-29 21:25:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 21:25:29,416 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:29,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:29,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:29,617 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash 708133075, now seen corresponding path program 1 times [2020-11-29 21:25:29,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:29,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310976716] [2020-11-29 21:25:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:29,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:29,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:29,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:29,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:25:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:25:29,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310976716] [2020-11-29 21:25:29,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778230649] [2020-11-29 21:25:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:25:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:25:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:25:30,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:25:30,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2020-11-29 21:25:30,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505623194] [2020-11-29 21:25:30,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 21:25:30,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:25:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-11-29 21:25:30,106 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 8 states. [2020-11-29 21:25:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:30,460 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-11-29 21:25:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 21:25:30,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-11-29 21:25:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:30,462 INFO L225 Difference]: With dead ends: 93 [2020-11-29 21:25:30,462 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 21:25:30,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-29 21:25:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 21:25:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 60. [2020-11-29 21:25:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 21:25:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-11-29 21:25:30,470 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 30 [2020-11-29 21:25:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:30,473 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-11-29 21:25:30,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 21:25:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-11-29 21:25:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 21:25:30,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:30,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:30,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 21:25:30,707 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1809388562, now seen corresponding path program 1 times [2020-11-29 21:25:30,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:30,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377785077] [2020-11-29 21:25:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:30,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:30,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:30,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:30,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-29 21:25:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:30,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 21:25:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:25:30,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377785077] [2020-11-29 21:25:30,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:30,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 21:25:30,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722938991] [2020-11-29 21:25:30,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 21:25:30,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 21:25:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:25:30,924 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 11 states. [2020-11-29 21:25:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:31,437 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-11-29 21:25:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 21:25:31,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-11-29 21:25:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:31,439 INFO L225 Difference]: With dead ends: 57 [2020-11-29 21:25:31,439 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 21:25:31,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-11-29 21:25:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 21:25:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-29 21:25:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 21:25:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-29 21:25:31,443 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 40 [2020-11-29 21:25:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:31,443 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-29 21:25:31,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 21:25:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-29 21:25:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 21:25:31,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:31,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:31,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 21:25:31,445 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1364625355, now seen corresponding path program 1 times [2020-11-29 21:25:31,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:31,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332596035] [2020-11-29 21:25:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-29 21:25:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 21:25:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-29 21:25:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 21:25:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332596035] [2020-11-29 21:25:31,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180941939] [2020-11-29 21:25:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:25:31,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:25:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 21:25:31,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:25:31,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2020-11-29 21:25:31,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155778490] [2020-11-29 21:25:31,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:25:31,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:31,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:25:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:25:31,732 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 6 states. [2020-11-29 21:25:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:31,840 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-11-29 21:25:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:25:31,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-11-29 21:25:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:31,842 INFO L225 Difference]: With dead ends: 77 [2020-11-29 21:25:31,842 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 21:25:31,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-29 21:25:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 21:25:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-11-29 21:25:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 21:25:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-11-29 21:25:31,846 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 44 [2020-11-29 21:25:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:31,847 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-11-29 21:25:31,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:25:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-11-29 21:25:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 21:25:31,848 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:31,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:32,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:32,049 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash 646285478, now seen corresponding path program 1 times [2020-11-29 21:25:32,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:32,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115008706] [2020-11-29 21:25:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-29 21:25:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 21:25:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-29 21:25:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 21:25:32,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115008706] [2020-11-29 21:25:32,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:32,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:25:32,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346933682] [2020-11-29 21:25:32,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:25:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:25:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:25:32,174 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 6 states. [2020-11-29 21:25:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:32,335 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-11-29 21:25:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:25:32,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-11-29 21:25:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:32,336 INFO L225 Difference]: With dead ends: 67 [2020-11-29 21:25:32,336 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 21:25:32,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:25:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 21:25:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-29 21:25:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 21:25:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-11-29 21:25:32,341 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 45 [2020-11-29 21:25:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:32,341 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-11-29 21:25:32,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:25:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-11-29 21:25:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 21:25:32,343 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:32,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:32,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 21:25:32,343 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:32,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1689910167, now seen corresponding path program 1 times [2020-11-29 21:25:32,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:32,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959392747] [2020-11-29 21:25:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-29 21:25:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 21:25:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-29 21:25:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 21:25:32,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959392747] [2020-11-29 21:25:32,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:25:32,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 21:25:32,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408909900] [2020-11-29 21:25:32,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:25:32,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:25:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:25:32,486 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-11-29 21:25:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:32,652 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-11-29 21:25:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 21:25:32,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-11-29 21:25:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:32,654 INFO L225 Difference]: With dead ends: 66 [2020-11-29 21:25:32,654 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 21:25:32,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:25:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 21:25:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-29 21:25:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 21:25:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-29 21:25:32,658 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 47 [2020-11-29 21:25:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:32,658 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-29 21:25:32,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:25:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-29 21:25:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 21:25:32,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:32,660 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:32,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 21:25:32,660 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:32,661 INFO L82 PathProgramCache]: Analyzing trace with hash -130424529, now seen corresponding path program 1 times [2020-11-29 21:25:32,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:32,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009958252] [2020-11-29 21:25:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:25:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-29 21:25:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-29 21:25:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 21:25:32,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009958252] [2020-11-29 21:25:32,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804038300] [2020-11-29 21:25:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:25:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:25:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:25:33,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:25:33,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-11-29 21:25:33,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371786263] [2020-11-29 21:25:33,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 21:25:33,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:33,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 21:25:33,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-29 21:25:33,353 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2020-11-29 21:25:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:33,917 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-11-29 21:25:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 21:25:33,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-11-29 21:25:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:33,918 INFO L225 Difference]: With dead ends: 58 [2020-11-29 21:25:33,918 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 21:25:33,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-11-29 21:25:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 21:25:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-11-29 21:25:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 21:25:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-11-29 21:25:33,921 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 48 [2020-11-29 21:25:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:33,922 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-11-29 21:25:33,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 21:25:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-11-29 21:25:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 21:25:33,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:33,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:34,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 21:25:34,135 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:34,135 INFO L82 PathProgramCache]: Analyzing trace with hash -337131664, now seen corresponding path program 2 times [2020-11-29 21:25:34,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:34,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022755098] [2020-11-29 21:25:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:25:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-29 21:25:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-29 21:25:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-29 21:25:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 21:25:34,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022755098] [2020-11-29 21:25:34,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754595622] [2020-11-29 21:25:34,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:34,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:25:34,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:25:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:25:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:25:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 21:25:34,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:25:34,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2020-11-29 21:25:34,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125355121] [2020-11-29 21:25:34,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 21:25:34,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 21:25:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-29 21:25:34,488 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 15 states. [2020-11-29 21:25:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:34,788 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-11-29 21:25:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 21:25:34,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-11-29 21:25:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:34,789 INFO L225 Difference]: With dead ends: 77 [2020-11-29 21:25:34,789 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 21:25:34,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-11-29 21:25:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 21:25:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-11-29 21:25:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 21:25:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-11-29 21:25:34,793 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 58 [2020-11-29 21:25:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:34,793 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-11-29 21:25:34,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 21:25:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-11-29 21:25:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-29 21:25:34,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:25:34,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:25:34,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:34,995 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 21:25:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:25:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 484963050, now seen corresponding path program 3 times [2020-11-29 21:25:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:25:34,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30021453] [2020-11-29 21:25:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:25:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 21:25:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:25:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 21:25:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-29 21:25:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-29 21:25:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-29 21:25:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-29 21:25:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:25:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 21:25:35,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30021453] [2020-11-29 21:25:35,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163708737] [2020-11-29 21:25:35,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:25:35,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 21:25:35,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:25:35,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:25:35,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:25:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-29 21:25:35,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:25:35,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 17 [2020-11-29 21:25:35,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927313658] [2020-11-29 21:25:35,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 21:25:35,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:25:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 21:25:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-11-29 21:25:35,457 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-11-29 21:25:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:25:36,285 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-11-29 21:25:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 21:25:36,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-11-29 21:25:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:25:36,286 INFO L225 Difference]: With dead ends: 64 [2020-11-29 21:25:36,286 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 21:25:36,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2020-11-29 21:25:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 21:25:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 21:25:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 21:25:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 21:25:36,287 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-11-29 21:25:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:25:36,288 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:25:36,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 21:25:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:25:36,288 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 21:25:36,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 21:25:36,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:25:36 BoogieIcfgContainer [2020-11-29 21:25:36,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:25:36,494 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:25:36,494 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:25:36,495 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:25:36,495 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:25:22" (3/4) ... [2020-11-29 21:25:36,498 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 21:25:36,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-29 21:25:36,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 21:25:36,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2020-11-29 21:25:36,507 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 21:25:36,507 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2020-11-29 21:25:36,507 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2020-11-29 21:25:36,516 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-29 21:25:36,517 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-29 21:25:36,517 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-29 21:25:36,517 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:25:36,582 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_51692ab4-3b75-4230-819e-1502c713e793/bin/uautomizer/witness.graphml [2020-11-29 21:25:36,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:25:36,583 INFO L168 Benchmark]: Toolchain (without parser) took 15156.33 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 84.1 MB in the beginning and 167.0 MB in the end (delta: -82.9 MB). Peak memory consumption was 668.0 kB. Max. memory is 16.1 GB. [2020-11-29 21:25:36,584 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 79.7 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:25:36,585 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.34 ms. Allocated memory is still 113.2 MB. Free memory was 83.8 MB in the beginning and 89.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:25:36,585 INFO L168 Benchmark]: Boogie Preprocessor took 69.55 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:25:36,586 INFO L168 Benchmark]: RCFGBuilder took 530.52 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 66.5 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 21:25:36,586 INFO L168 Benchmark]: TraceAbstraction took 14115.68 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 66.1 MB in the beginning and 170.9 MB in the end (delta: -104.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:25:36,586 INFO L168 Benchmark]: Witness Printer took 88.05 ms. Allocated memory is still 197.1 MB. Free memory was 170.9 MB in the beginning and 167.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:25:36,588 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 79.7 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 331.34 ms. Allocated memory is still 113.2 MB. Free memory was 83.8 MB in the beginning and 89.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.55 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 530.52 ms. Allocated memory is still 113.2 MB. Free memory was 87.4 MB in the beginning and 66.5 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14115.68 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 66.1 MB in the beginning and 170.9 MB in the end (delta: -104.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 88.05 ms. Allocated memory is still 197.1 MB. Free memory was 170.9 MB in the beginning and 167.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 66 locations, 17 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.0s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 611 SDtfs, 1581 SDslu, 1146 SDs, 0 SdLazy, 3639 SolverSat, 644 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 646 GetRequests, 396 SyntacticMatches, 7 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 219 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 877 NumberOfCodeBlocks, 860 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 853 ConstructedInterpolants, 16 QuantifiedInterpolants, 180966 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1256 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 24 InterpolantComputations, 13 PerfectInterpolantSequences, 188/230 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...