./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/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 a16cd99b349cc6bdff463f25bc1978dcd091a75b ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/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 a16cd99b349cc6bdff463f25bc1978dcd091a75b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 10:33:25,108 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 10:33:25,109 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 10:33:25,117 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 10:33:25,117 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 10:33:25,117 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 10:33:25,118 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 10:33:25,119 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 10:33:25,120 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 10:33:25,122 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 10:33:25,122 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 10:33:25,122 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 10:33:25,123 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 10:33:25,124 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 10:33:25,125 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 10:33:25,126 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 10:33:25,126 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 10:33:25,128 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 10:33:25,130 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 10:33:25,131 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 10:33:25,131 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 10:33:25,132 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 10:33:25,134 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 10:33:25,134 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 10:33:25,135 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 10:33:25,135 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 10:33:25,136 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 10:33:25,137 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 10:33:25,138 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 10:33:25,139 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 10:33:25,139 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 10:33:25,140 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 10:33:25,140 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 10:33:25,140 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 10:33:25,141 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 10:33:25,142 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 10:33:25,142 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-28 10:33:25,151 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 10:33:25,151 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 10:33:25,152 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 10:33:25,152 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 10:33:25,152 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 10:33:25,152 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 10:33:25,153 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 10:33:25,153 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 10:33:25,153 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 10:33:25,153 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 10:33:25,154 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 10:33:25,155 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 10:33:25,155 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 10:33:25,155 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 10:33:25,155 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 10:33:25,155 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 10:33:25,155 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 10:33:25,155 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 10:33:25,155 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 10:33:25,155 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 10:33:25,156 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in 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/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/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 -> a16cd99b349cc6bdff463f25bc1978dcd091a75b [2018-11-28 10:33:25,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 10:33:25,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 10:33:25,190 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 10:33:25,191 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 10:33:25,191 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 10:33:25,192 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-11-28 10:33:25,230 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/c1a60c8f9/4436e9947e484adb9081b713a3d2a297/FLAGd5a447275 [2018-11-28 10:33:25,649 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 10:33:25,649 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-11-28 10:33:25,655 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/c1a60c8f9/4436e9947e484adb9081b713a3d2a297/FLAGd5a447275 [2018-11-28 10:33:25,665 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/c1a60c8f9/4436e9947e484adb9081b713a3d2a297 [2018-11-28 10:33:25,667 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 10:33:25,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-28 10:33:25,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:25,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 10:33:25,672 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 10:33:25,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:25,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5ad232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25, skipping insertion in model container [2018-11-28 10:33:25,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:25,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 10:33:25,702 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 10:33:25,863 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:25,871 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 10:33:25,943 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:25,969 INFO L195 MainTranslator]: Completed translation [2018-11-28 10:33:25,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25 WrapperNode [2018-11-28 10:33:25,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:25,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 10:33:25,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 10:33:25,970 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 10:33:25,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:25,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:25,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:25,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:25,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:26,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:26,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... [2018-11-28 10:33:26,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 10:33:26,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 10:33:26,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 10:33:26,009 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 10:33:26,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/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 [2018-11-28 10:33:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 10:33:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 10:33:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-11-28 10:33:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 10:33:26,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2018-11-28 10:33:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2018-11-28 10:33:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure select [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure random [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2018-11-28 10:33:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2018-11-28 10:33:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2018-11-28 10:33:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2018-11-28 10:33:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2018-11-28 10:33:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2018-11-28 10:33:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2018-11-28 10:33:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2018-11-28 10:33:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2018-11-28 10:33:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2018-11-28 10:33:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2018-11-28 10:33:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure __secure_getenv [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2018-11-28 10:33:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure system [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2018-11-28 10:33:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure div [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2018-11-28 10:33:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2018-11-28 10:33:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2018-11-28 10:33:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2018-11-28 10:33:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2018-11-28 10:33:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2018-11-28 10:33:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-11-28 10:33:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 10:33:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 10:33:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 10:33:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-28 10:33:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 10:33:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-28 10:33:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 10:33:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 10:33:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 10:33:26,357 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 10:33:26,357 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-28 10:33:26,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:26 BoogieIcfgContainer [2018-11-28 10:33:26,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 10:33:26,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 10:33:26,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 10:33:26,361 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 10:33:26,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 10:33:25" (1/3) ... [2018-11-28 10:33:26,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b74f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:26, skipping insertion in model container [2018-11-28 10:33:26,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:25" (2/3) ... [2018-11-28 10:33:26,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b74f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:26, skipping insertion in model container [2018-11-28 10:33:26,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:26" (3/3) ... [2018-11-28 10:33:26,363 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-11-28 10:33:26,370 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 10:33:26,376 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-11-28 10:33:26,387 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-11-28 10:33:26,403 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 10:33:26,404 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 10:33:26,404 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-28 10:33:26,404 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 10:33:26,404 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 10:33:26,404 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 10:33:26,404 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 10:33:26,405 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 10:33:26,405 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 10:33:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-11-28 10:33:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 10:33:26,422 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:26,423 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:26,424 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:26,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash 350138613, now seen corresponding path program 1 times [2018-11-28 10:33:26,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:26,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:26,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:26,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:26,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:26,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:26,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 10:33:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 10:33:26,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 10:33:26,527 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2018-11-28 10:33:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:26,538 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-28 10:33:26,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 10:33:26,539 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-11-28 10:33:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:26,546 INFO L225 Difference]: With dead ends: 34 [2018-11-28 10:33:26,546 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 10:33:26,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 10:33:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 10:33:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-28 10:33:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 10:33:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-28 10:33:26,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2018-11-28 10:33:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:26,572 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-28 10:33:26,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 10:33:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-28 10:33:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 10:33:26,572 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:26,573 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:26,573 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:26,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2031253782, now seen corresponding path program 1 times [2018-11-28 10:33:26,573 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:26,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:26,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:26,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:26,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:26,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:26,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:26,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:26,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,636 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2018-11-28 10:33:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:26,682 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-11-28 10:33:26,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:26,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-28 10:33:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:26,683 INFO L225 Difference]: With dead ends: 38 [2018-11-28 10:33:26,683 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 10:33:26,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 10:33:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2018-11-28 10:33:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-28 10:33:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-28 10:33:26,687 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2018-11-28 10:33:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:26,688 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-28 10:33:26,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-28 10:33:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 10:33:26,688 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:26,689 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:26,689 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:26,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2031253781, now seen corresponding path program 1 times [2018-11-28 10:33:26,689 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:26,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:26,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:26,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:26,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:26,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:26,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:26,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,748 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2018-11-28 10:33:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:26,777 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-11-28 10:33:26,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:26,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-28 10:33:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:26,778 INFO L225 Difference]: With dead ends: 36 [2018-11-28 10:33:26,778 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 10:33:26,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 10:33:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2018-11-28 10:33:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 10:33:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-11-28 10:33:26,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 10 [2018-11-28 10:33:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:26,782 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-11-28 10:33:26,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-11-28 10:33:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 10:33:26,782 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:26,782 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:26,782 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:26,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2031255141, now seen corresponding path program 1 times [2018-11-28 10:33:26,783 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:26,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:26,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:26,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:26,798 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:26,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:26,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,799 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2018-11-28 10:33:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:26,818 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-11-28 10:33:26,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:26,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-28 10:33:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:26,819 INFO L225 Difference]: With dead ends: 35 [2018-11-28 10:33:26,820 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 10:33:26,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 10:33:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-11-28 10:33:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 10:33:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2018-11-28 10:33:26,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 10 [2018-11-28 10:33:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:26,824 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2018-11-28 10:33:26,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2018-11-28 10:33:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 10:33:26,824 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:26,824 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:26,825 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:26,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2031255097, now seen corresponding path program 1 times [2018-11-28 10:33:26,825 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:26,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:26,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:26,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:26,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:26,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:26,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,845 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2018-11-28 10:33:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:26,892 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-11-28 10:33:26,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:26,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-28 10:33:26,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:26,893 INFO L225 Difference]: With dead ends: 30 [2018-11-28 10:33:26,893 INFO L226 Difference]: Without dead ends: 29 [2018-11-28 10:33:26,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-28 10:33:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-11-28 10:33:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-28 10:33:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-28 10:33:26,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2018-11-28 10:33:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:26,896 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-28 10:33:26,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-28 10:33:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 10:33:26,896 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:26,897 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:26,897 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:26,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1153486843, now seen corresponding path program 1 times [2018-11-28 10:33:26,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:26,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:26,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:26,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:26,924 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:26,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:26,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:26,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:26,924 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2018-11-28 10:33:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:26,970 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2018-11-28 10:33:26,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:26,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-11-28 10:33:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:26,971 INFO L225 Difference]: With dead ends: 38 [2018-11-28 10:33:26,971 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 10:33:26,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 10:33:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2018-11-28 10:33:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 10:33:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-28 10:33:26,973 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2018-11-28 10:33:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:26,974 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-28 10:33:26,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-28 10:33:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 10:33:26,974 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:26,975 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:26,975 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:26,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1153486799, now seen corresponding path program 1 times [2018-11-28 10:33:26,975 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:26,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:26,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:26,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:27,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:27,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:27,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:27,011 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 4 states. [2018-11-28 10:33:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:27,052 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-28 10:33:27,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:27,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-11-28 10:33:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:27,053 INFO L225 Difference]: With dead ends: 31 [2018-11-28 10:33:27,053 INFO L226 Difference]: Without dead ends: 31 [2018-11-28 10:33:27,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-28 10:33:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-11-28 10:33:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 10:33:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-28 10:33:27,057 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2018-11-28 10:33:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:27,058 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-28 10:33:27,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-11-28 10:33:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 10:33:27,058 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:27,059 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:27,059 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:27,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1153486798, now seen corresponding path program 1 times [2018-11-28 10:33:27,059 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:27,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:27,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:27,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:27,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:27,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:27,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:27,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:27,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:27,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:27,116 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2018-11-28 10:33:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:27,171 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-11-28 10:33:27,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:27,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-11-28 10:33:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:27,173 INFO L225 Difference]: With dead ends: 33 [2018-11-28 10:33:27,173 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 10:33:27,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 10:33:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-11-28 10:33:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 10:33:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-28 10:33:27,176 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2018-11-28 10:33:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:27,178 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-28 10:33:27,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-28 10:33:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-28 10:33:27,179 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:27,179 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:27,180 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:27,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1315071203, now seen corresponding path program 1 times [2018-11-28 10:33:27,180 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:27,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:27,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:33:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:33:27,222 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 10:33:27,232 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-11-28 10:33:27,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 10:33:27 BoogieIcfgContainer [2018-11-28 10:33:27,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 10:33:27,242 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 10:33:27,242 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 10:33:27,242 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 10:33:27,243 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:26" (3/4) ... [2018-11-28 10:33:27,246 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 10:33:27,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 10:33:27,247 INFO L168 Benchmark]: Toolchain (without parser) took 1579.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.6 MB in the beginning and 976.9 MB in the end (delta: -26.2 MB). Peak memory consumption was 114.3 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:27,248 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:27,248 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:27,248 INFO L168 Benchmark]: Boogie Preprocessor took 38.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:27,249 INFO L168 Benchmark]: RCFGBuilder took 348.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:27,249 INFO L168 Benchmark]: TraceAbstraction took 883.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.9 MB in the end (delta: 101.0 MB). Peak memory consumption was 101.0 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:27,250 INFO L168 Benchmark]: Witness Printer took 3.96 ms. Allocated memory is still 1.2 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:27,252 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 348.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 883.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.9 MB in the end (delta: 101.0 MB). Peak memory consumption was 101.0 MB. Max. memory is 11.5 GB. * Witness Printer took 3.96 ms. Allocated memory is still 1.2 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 626. Possible FailurePath: [L627] List t; [L628] List p = 0; VAL [p={0:0}] [L629] COND TRUE __VERIFIER_nondet_int() [L630] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L631] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L632] t->h = 1 VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L633] t->n = p VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] [L634] p = t VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, t={14:0}] [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, t={14:0}] [L637] EXPR p->h VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, p->h=1, t={14:0}] [L637] COND FALSE !(p->h != 1) [L640] EXPR p->n VAL [malloc(sizeof(struct node))={14:0}, p={14:0}, p->n={0:0}, t={14:0}] [L640] p = p->n [L636] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={14:0}, p={0:0}, t={14:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 9 error locations. UNSAFE Result, 0.8s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 177 SDtfs, 132 SDslu, 88 SDs, 0 SdLazy, 146 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 56 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 3166 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-0cd3be1 [2018-11-28 10:33:28,757 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 10:33:28,759 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 10:33:28,767 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 10:33:28,768 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 10:33:28,768 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 10:33:28,769 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 10:33:28,770 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 10:33:28,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 10:33:28,772 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 10:33:28,773 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 10:33:28,773 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 10:33:28,773 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 10:33:28,774 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 10:33:28,775 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 10:33:28,775 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 10:33:28,776 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 10:33:28,777 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 10:33:28,778 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 10:33:28,779 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 10:33:28,780 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 10:33:28,781 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 10:33:28,782 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 10:33:28,782 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 10:33:28,783 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 10:33:28,783 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 10:33:28,784 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 10:33:28,784 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 10:33:28,785 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 10:33:28,786 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 10:33:28,786 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 10:33:28,786 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 10:33:28,786 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 10:33:28,787 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 10:33:28,787 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 10:33:28,788 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 10:33:28,788 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2018-11-28 10:33:28,798 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 10:33:28,798 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 10:33:28,798 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 10:33:28,799 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 10:33:28,799 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 10:33:28,799 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 10:33:28,799 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 10:33:28,800 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 10:33:28,800 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 10:33:28,800 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 10:33:28,800 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 10:33:28,800 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 10:33:28,800 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 10:33:28,800 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-28 10:33:28,800 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-28 10:33:28,801 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-28 10:33:28,801 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 10:33:28,801 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-28 10:33:28,801 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-28 10:33:28,801 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 10:33:28,801 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 10:33:28,801 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 10:33:28,801 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 10:33:28,802 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-11-28 10:33:28,802 INFO L133 SettingsManager]: * Logic for external solver=AUFBV 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/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/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 -> a16cd99b349cc6bdff463f25bc1978dcd091a75b [2018-11-28 10:33:28,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 10:33:28,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 10:33:28,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 10:33:28,839 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 10:33:28,839 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 10:33:28,840 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/../../sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-11-28 10:33:28,890 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/402afd5f8/bb976899b8ab44f99a131a0fd7d2f82a/FLAG607825757 [2018-11-28 10:33:29,273 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 10:33:29,274 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/sv-benchmarks/c/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-11-28 10:33:29,284 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/402afd5f8/bb976899b8ab44f99a131a0fd7d2f82a/FLAG607825757 [2018-11-28 10:33:29,295 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/data/402afd5f8/bb976899b8ab44f99a131a0fd7d2f82a [2018-11-28 10:33:29,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 10:33:29,298 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-28 10:33:29,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:29,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 10:33:29,302 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 10:33:29,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f49b483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29, skipping insertion in model container [2018-11-28 10:33:29,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 10:33:29,333 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 10:33:29,529 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:29,540 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 10:33:29,571 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:29,648 INFO L195 MainTranslator]: Completed translation [2018-11-28 10:33:29,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29 WrapperNode [2018-11-28 10:33:29,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:29,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 10:33:29,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 10:33:29,649 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 10:33:29,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... [2018-11-28 10:33:29,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 10:33:29,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 10:33:29,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 10:33:29,689 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 10:33:29,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/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 [2018-11-28 10:33:29,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 10:33:29,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 10:33:29,726 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-11-28 10:33:29,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2018-11-28 10:33:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2018-11-28 10:33:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure select [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure random [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2018-11-28 10:33:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2018-11-28 10:33:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2018-11-28 10:33:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2018-11-28 10:33:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure free [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2018-11-28 10:33:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure __secure_getenv [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2018-11-28 10:33:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure system [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2018-11-28 10:33:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure div [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2018-11-28 10:33:29,736 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-11-28 10:33:29,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 10:33:29,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 10:33:30,027 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 10:33:30,027 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-28 10:33:30,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:30 BoogieIcfgContainer [2018-11-28 10:33:30,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 10:33:30,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 10:33:30,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 10:33:30,030 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 10:33:30,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 10:33:29" (1/3) ... [2018-11-28 10:33:30,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56252cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:30, skipping insertion in model container [2018-11-28 10:33:30,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:29" (2/3) ... [2018-11-28 10:33:30,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56252cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:30, skipping insertion in model container [2018-11-28 10:33:30,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:30" (3/3) ... [2018-11-28 10:33:30,033 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-11-28 10:33:30,039 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 10:33:30,044 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-11-28 10:33:30,056 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-11-28 10:33:30,076 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 10:33:30,076 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 10:33:30,076 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-28 10:33:30,076 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 10:33:30,076 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 10:33:30,077 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 10:33:30,077 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 10:33:30,077 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 10:33:30,077 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 10:33:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-28 10:33:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 10:33:30,090 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:30,091 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:30,093 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:30,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2128039411, now seen corresponding path program 1 times [2018-11-28 10:33:30,099 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:30,099 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:30,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:30,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:30,158 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:30,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:30,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:30,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 10:33:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 10:33:30,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 10:33:30,179 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-11-28 10:33:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:30,193 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-28 10:33:30,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 10:33:30,194 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-11-28 10:33:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:30,200 INFO L225 Difference]: With dead ends: 33 [2018-11-28 10:33:30,201 INFO L226 Difference]: Without dead ends: 26 [2018-11-28 10:33:30,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 10:33:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-28 10:33:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-28 10:33:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 10:33:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-28 10:33:30,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 9 [2018-11-28 10:33:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:30,230 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-28 10:33:30,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 10:33:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-28 10:33:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 10:33:30,231 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:30,231 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:30,231 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:30,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:30,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2128023472, now seen corresponding path program 1 times [2018-11-28 10:33:30,232 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:30,232 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:30,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:30,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:30,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-28 10:33:30,298 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-28 10:33:30,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 10:33:30,303 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-11-28 10:33:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:30,309 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:30,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:30,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:30,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,312 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 3 states. [2018-11-28 10:33:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:30,366 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-11-28 10:33:30,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:30,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-28 10:33:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:30,367 INFO L225 Difference]: With dead ends: 36 [2018-11-28 10:33:30,367 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 10:33:30,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 10:33:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2018-11-28 10:33:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 10:33:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 10:33:30,370 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 9 [2018-11-28 10:33:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:30,370 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 10:33:30,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 10:33:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 10:33:30,371 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:30,371 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:30,371 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:30,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:30,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2128023473, now seen corresponding path program 1 times [2018-11-28 10:33:30,372 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:30,372 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:30,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:30,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:30,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-28 10:33:30,418 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-28 10:33:30,423 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 10:33:30,423 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-11-28 10:33:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:30,431 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:30,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:30,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:30,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,433 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 3 states. [2018-11-28 10:33:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:30,490 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-28 10:33:30,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:30,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-28 10:33:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:30,491 INFO L225 Difference]: With dead ends: 34 [2018-11-28 10:33:30,491 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 10:33:30,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 10:33:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2018-11-28 10:33:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-28 10:33:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-28 10:33:30,494 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 9 [2018-11-28 10:33:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:30,494 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-28 10:33:30,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-11-28 10:33:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 10:33:30,494 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:30,495 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:30,495 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:30,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2128022113, now seen corresponding path program 1 times [2018-11-28 10:33:30,495 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:30,495 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:30,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:30,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:30,525 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:30,526 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:30,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 10:33:30,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:30,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:30,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,527 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2018-11-28 10:33:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:30,567 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-28 10:33:30,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:30,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-28 10:33:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:30,568 INFO L225 Difference]: With dead ends: 33 [2018-11-28 10:33:30,568 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 10:33:30,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 10:33:30,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2018-11-28 10:33:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 10:33:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2018-11-28 10:33:30,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2018-11-28 10:33:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:30,572 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2018-11-28 10:33:30,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2018-11-28 10:33:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-28 10:33:30,572 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:30,572 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:30,573 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:30,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2128022157, now seen corresponding path program 1 times [2018-11-28 10:33:30,573 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:30,573 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:30,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:30,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:30,623 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:30,624 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:30,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:30,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 10:33:30,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 10:33:30,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,625 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2018-11-28 10:33:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:30,678 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-28 10:33:30,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 10:33:30,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-28 10:33:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:30,679 INFO L225 Difference]: With dead ends: 28 [2018-11-28 10:33:30,679 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 10:33:30,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 10:33:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 10:33:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-11-28 10:33:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 10:33:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-11-28 10:33:30,682 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2018-11-28 10:33:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:30,682 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-11-28 10:33:30,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 10:33:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-11-28 10:33:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 10:33:30,683 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:30,683 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:30,683 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:30,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash -194724622, now seen corresponding path program 1 times [2018-11-28 10:33:30,684 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:30,684 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:30,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:30,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:30,759 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:30,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:30,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 10:33:30,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:30,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:30,762 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2018-11-28 10:33:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:30,848 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-11-28 10:33:30,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:30,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-28 10:33:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:30,850 INFO L225 Difference]: With dead ends: 36 [2018-11-28 10:33:30,850 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 10:33:30,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 10:33:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2018-11-28 10:33:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 10:33:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 10:33:30,853 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2018-11-28 10:33:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:30,853 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 10:33:30,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 10:33:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 10:33:30,854 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:30,854 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:30,854 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:30,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash -194724578, now seen corresponding path program 1 times [2018-11-28 10:33:30,855 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:30,855 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:30,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:30,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:30,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-28 10:33:30,932 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-28 10:33:30,935 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 10:33:30,935 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-11-28 10:33:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:30,949 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:30,950 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:30,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:30,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:30,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:30,951 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2018-11-28 10:33:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:31,070 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-11-28 10:33:31,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:31,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-28 10:33:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:31,072 INFO L225 Difference]: With dead ends: 29 [2018-11-28 10:33:31,072 INFO L226 Difference]: Without dead ends: 29 [2018-11-28 10:33:31,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-28 10:33:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-11-28 10:33:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 10:33:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-28 10:33:31,076 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2018-11-28 10:33:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:31,076 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-28 10:33:31,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-28 10:33:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 10:33:31,077 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:31,077 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:31,077 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:31,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:31,078 INFO L82 PathProgramCache]: Analyzing trace with hash -194724577, now seen corresponding path program 1 times [2018-11-28 10:33:31,078 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:31,078 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:31,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:31,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:31,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-28 10:33:31,146 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-28 10:33:31,151 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-28 10:33:31,151 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-11-28 10:33:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:31,169 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 10:33:31,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:31,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 10:33:31,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 10:33:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 10:33:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 10:33:31,172 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-11-28 10:33:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:31,262 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-28 10:33:31,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 10:33:31,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-28 10:33:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:31,263 INFO L225 Difference]: With dead ends: 31 [2018-11-28 10:33:31,263 INFO L226 Difference]: Without dead ends: 31 [2018-11-28 10:33:31,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-28 10:33:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-28 10:33:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-11-28 10:33:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 10:33:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-28 10:33:31,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2018-11-28 10:33:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:31,267 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-28 10:33:31,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 10:33:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-28 10:33:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 10:33:31,267 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:31,268 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:31,268 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-28 10:33:31,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:31,268 INFO L82 PathProgramCache]: Analyzing trace with hash -496137585, now seen corresponding path program 1 times [2018-11-28 10:33:31,268 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-28 10:33:31,269 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e48273d3-1f6b-41f0-a14f-39e7ad673c26/bin-2019/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-11-28 10:33:31,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:33:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 10:33:31,415 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 10:33:31,424 WARN L416 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-11-28 10:33:31,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 10:33:31 BoogieIcfgContainer [2018-11-28 10:33:31,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 10:33:31,433 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 10:33:31,433 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 10:33:31,433 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 10:33:31,434 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:30" (3/4) ... [2018-11-28 10:33:31,436 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 10:33:31,436 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 10:33:31,437 INFO L168 Benchmark]: Toolchain (without parser) took 2139.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 936.7 MB in the beginning and 941.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 162.3 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:31,438 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:31,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 936.7 MB in the beginning and 1.2 GB in the end (delta: -217.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:31,439 INFO L168 Benchmark]: Boogie Preprocessor took 39.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:31,439 INFO L168 Benchmark]: RCFGBuilder took 338.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.9 MB). Peak memory consumption was 50.9 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:31,440 INFO L168 Benchmark]: TraceAbstraction took 1405.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 941.1 MB in the end (delta: 155.6 MB). Peak memory consumption was 155.6 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:31,440 INFO L168 Benchmark]: Witness Printer took 3.23 ms. Allocated memory is still 1.2 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:31,442 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 349.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 936.7 MB in the beginning and 1.2 GB in the end (delta: -217.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 39.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 338.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.9 MB). Peak memory consumption was 50.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1405.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 941.1 MB in the end (delta: 155.6 MB). Peak memory consumption was 155.6 MB. Max. memory is 11.5 GB. * Witness Printer took 3.23 ms. Allocated memory is still 1.2 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 626. Possible FailurePath: [L627] List t; [L628] List p = 0; VAL [p={0:0}] [L629] COND TRUE __VERIFIER_nondet_int() [L630] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L631] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L632] t->h = 1 VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L633] t->n = p VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] [L634] p = t VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, t={-2147483648:0}] [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, t={-2147483648:0}] [L637] EXPR p->h VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=1, t={-2147483648:0}] [L637] COND FALSE !(p->h != 1) [L640] EXPR p->n VAL [malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->n={0:0}, t={-2147483648:0}] [L640] p = p->n [L636] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={-2147483648:0}, p={0:0}, t={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 9 error locations. UNSAFE Result, 1.3s OverallTime, 9 OverallIterations, 1 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 126 SDslu, 78 SDs, 0 SdLazy, 146 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 54 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 79 ConstructedInterpolants, 0 QuantifiedInterpolants, 2855 SizeOfPredicates, 13 NumberOfNonLiveVariables, 332 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 3/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...