./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be --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 f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be --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 f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:11:24,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:11:24,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:11:24,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:11:24,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:11:24,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:11:24,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:11:24,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:11:24,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:11:24,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:11:24,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:11:24,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:11:24,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:11:24,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:11:24,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:11:24,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:11:24,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:11:24,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:11:24,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:11:24,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:11:24,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:11:24,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:11:24,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:11:24,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:11:24,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:11:24,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:11:24,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:11:24,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:11:24,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:11:24,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:11:24,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:11:24,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:11:24,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:11:24,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:11:24,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:11:24,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:11:24,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:11:24,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:11:24,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:11:24,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:11:24,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:11:24,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:11:24,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:11:24,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:11:24,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:11:24,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:11:24,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:11:24,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:11:24,225 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:11:24,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:11:24,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:11:24,226 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:11:24,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:11:24,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:11:24,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:11:24,228 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:11:24,228 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:11:24,228 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:11:24,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:11:24,229 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:11:24,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:11:24,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:11:24,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:11:24,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:11:24,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:11:24,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:11:24,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:11:24,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:11:24,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:11:24,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:11:24,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:11:24,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f [2021-10-21 19:11:24,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:11:24,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:11:24,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:11:24,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:11:24,591 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:11:24,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-21 19:11:24,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/aa8ea40c4/6fe566da1b1b4ca3b07a19cafbbe3dbb/FLAGf87f61f45 [2021-10-21 19:11:25,212 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:11:25,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-21 19:11:25,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/aa8ea40c4/6fe566da1b1b4ca3b07a19cafbbe3dbb/FLAGf87f61f45 [2021-10-21 19:11:25,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/aa8ea40c4/6fe566da1b1b4ca3b07a19cafbbe3dbb [2021-10-21 19:11:25,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:11:25,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:11:25,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:11:25,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:11:25,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:11:25,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:11:25" (1/1) ... [2021-10-21 19:11:25,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdd1a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:25, skipping insertion in model container [2021-10-21 19:11:25,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:11:25" (1/1) ... [2021-10-21 19:11:25,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:11:25,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:11:25,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:11:25,933 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:11:26,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:11:26,044 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:11:26,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26 WrapperNode [2021-10-21 19:11:26,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:11:26,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:11:26,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:11:26,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:11:26,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:11:26,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:11:26,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:11:26,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:11:26,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:11:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:26,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:26,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:11:26,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:11:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:11:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:11:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:11:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:11:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:11:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:11:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:11:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-21 19:11:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-21 19:11:26,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:11:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:11:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:11:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:11:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:11:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:11:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:11:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:11:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:11:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:11:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:11:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:11:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:11:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:11:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:11:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:11:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:11:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:11:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:11:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:11:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:11:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:11:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:11:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:11:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:11:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:11:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:11:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:11:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:11:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:11:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:11:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:11:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:11:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:11:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:11:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:11:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:11:26,212 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:11:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:11:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:11:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:11:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:11:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:11:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:11:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:11:26,214 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:11:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:11:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:11:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:11:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:11:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:11:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:11:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:11:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:11:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:11:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:11:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:11:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:11:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:11:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:11:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:11:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:11:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-21 19:11:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:11:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:11:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:11:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:11:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:11:26,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:11:26,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:11:26,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:11:26,897 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:11:26,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:26 BoogieIcfgContainer [2021-10-21 19:11:26,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:11:26,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:11:26,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:11:26,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:11:26,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:11:25" (1/3) ... [2021-10-21 19:11:26,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1a9589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:11:26, skipping insertion in model container [2021-10-21 19:11:26,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26" (2/3) ... [2021-10-21 19:11:26,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1a9589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:11:26, skipping insertion in model container [2021-10-21 19:11:26,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:26" (3/3) ... [2021-10-21 19:11:26,916 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2021-10-21 19:11:26,925 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:11:26,925 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-21 19:11:26,983 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:11:26,992 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:11:26,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-21 19:11:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:11:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:11:27,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:27,020 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:27,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:27,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-10-21 19:11:27,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:27,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090889227] [2021-10-21 19:11:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:27,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:27,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:27,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:27,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090889227] [2021-10-21 19:11:27,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090889227] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:27,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:27,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:11:27,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607515306] [2021-10-21 19:11:27,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:11:27,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:11:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:11:27,395 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:27,672 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-10-21 19:11:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:11:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-21 19:11:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:27,686 INFO L225 Difference]: With dead ends: 92 [2021-10-21 19:11:27,686 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 19:11:27,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:11:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 19:11:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-21 19:11:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:11:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-10-21 19:11:27,740 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-10-21 19:11:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:27,740 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-10-21 19:11:27,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-10-21 19:11:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:11:27,742 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:27,742 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:27,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:11:27,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-10-21 19:11:27,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:27,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205409057] [2021-10-21 19:11:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:27,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:27,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:27,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205409057] [2021-10-21 19:11:27,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205409057] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:27,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:27,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:11:27,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955616617] [2021-10-21 19:11:27,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:27,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:27,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:27,939 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:28,226 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-10-21 19:11:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:11:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:11:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:28,232 INFO L225 Difference]: With dead ends: 91 [2021-10-21 19:11:28,232 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 19:11:28,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 19:11:28,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-10-21 19:11:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:11:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-10-21 19:11:28,254 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-10-21 19:11:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:28,255 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-10-21 19:11:28,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-10-21 19:11:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:11:28,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:28,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:11:28,257 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,258 INFO L82 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-10-21 19:11:28,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:28,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553688368] [2021-10-21 19:11:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:28,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553688368] [2021-10-21 19:11:28,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553688368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:28,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:28,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:11:28,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881292264] [2021-10-21 19:11:28,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:28,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:28,424 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:28,742 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-10-21 19:11:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:11:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:11:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:28,745 INFO L225 Difference]: With dead ends: 135 [2021-10-21 19:11:28,745 INFO L226 Difference]: Without dead ends: 135 [2021-10-21 19:11:28,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-21 19:11:28,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-10-21 19:11:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:11:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-10-21 19:11:28,761 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-10-21 19:11:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:28,761 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-10-21 19:11:28,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-10-21 19:11:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:11:28,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:28,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:11:28,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-10-21 19:11:28,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:28,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996462736] [2021-10-21 19:11:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:28,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996462736] [2021-10-21 19:11:28,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996462736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:28,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:28,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:11:28,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536474177] [2021-10-21 19:11:28,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:28,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:28,880 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:29,088 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-10-21 19:11:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:11:29,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:11:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:29,093 INFO L225 Difference]: With dead ends: 149 [2021-10-21 19:11:29,093 INFO L226 Difference]: Without dead ends: 144 [2021-10-21 19:11:29,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-21 19:11:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-10-21 19:11:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:11:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-10-21 19:11:29,109 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-10-21 19:11:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:29,109 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-10-21 19:11:29,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-10-21 19:11:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:11:29,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:29,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:29,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:11:29,110 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-10-21 19:11:29,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:29,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878374150] [2021-10-21 19:11:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:29,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:29,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:29,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:29,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878374150] [2021-10-21 19:11:29,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878374150] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:29,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:29,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:11:29,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485501821] [2021-10-21 19:11:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:11:29,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:11:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:29,206 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:29,462 INFO L93 Difference]: Finished difference Result 134 states and 196 transitions. [2021-10-21 19:11:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:11:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:11:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:29,465 INFO L225 Difference]: With dead ends: 134 [2021-10-21 19:11:29,465 INFO L226 Difference]: Without dead ends: 134 [2021-10-21 19:11:29,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-21 19:11:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-10-21 19:11:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.7582417582417582) internal successors, (160), 116 states have internal predecessors, (160), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:11:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-10-21 19:11:29,477 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 13 [2021-10-21 19:11:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:29,477 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-10-21 19:11:29,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-10-21 19:11:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:11:29,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:29,478 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:29,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:11:29,478 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-10-21 19:11:29,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:29,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508424922] [2021-10-21 19:11:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:29,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:29,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:29,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:29,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508424922] [2021-10-21 19:11:29,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508424922] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:29,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:29,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:11:29,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097978648] [2021-10-21 19:11:29,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:29,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:29,561 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:29,904 INFO L93 Difference]: Finished difference Result 220 states and 324 transitions. [2021-10-21 19:11:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:11:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:11:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:29,906 INFO L225 Difference]: With dead ends: 220 [2021-10-21 19:11:29,906 INFO L226 Difference]: Without dead ends: 220 [2021-10-21 19:11:29,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-21 19:11:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 195. [2021-10-21 19:11:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 152 states have (on average 1.7236842105263157) internal successors, (262), 177 states have internal predecessors, (262), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-21 19:11:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 300 transitions. [2021-10-21 19:11:29,920 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 300 transitions. Word has length 13 [2021-10-21 19:11:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:29,921 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 300 transitions. [2021-10-21 19:11:29,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 300 transitions. [2021-10-21 19:11:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:11:29,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:29,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:29,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:11:29,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-10-21 19:11:29,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:29,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088831102] [2021-10-21 19:11:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:29,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:30,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:30,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088831102] [2021-10-21 19:11:30,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088831102] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:30,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:30,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:11:30,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310465057] [2021-10-21 19:11:30,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:30,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:30,023 INFO L87 Difference]: Start difference. First operand 195 states and 300 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:30,349 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2021-10-21 19:11:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:11:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:11:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:30,352 INFO L225 Difference]: With dead ends: 271 [2021-10-21 19:11:30,353 INFO L226 Difference]: Without dead ends: 271 [2021-10-21 19:11:30,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-21 19:11:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 249. [2021-10-21 19:11:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 204 states have (on average 1.696078431372549) internal successors, (346), 227 states have internal predecessors, (346), 14 states have call successors, (14), 14 states have call predecessors, (14), 15 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-21 19:11:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 384 transitions. [2021-10-21 19:11:30,376 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 384 transitions. Word has length 13 [2021-10-21 19:11:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:30,377 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 384 transitions. [2021-10-21 19:11:30,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 384 transitions. [2021-10-21 19:11:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:11:30,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:30,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:11:30,378 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-10-21 19:11:30,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:30,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794954560] [2021-10-21 19:11:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:30,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:30,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:30,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794954560] [2021-10-21 19:11:30,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794954560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:30,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:30,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:11:30,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597395770] [2021-10-21 19:11:30,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:11:30,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:11:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:30,466 INFO L87 Difference]: Start difference. First operand 249 states and 384 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:30,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:30,674 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2021-10-21 19:11:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:11:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-21 19:11:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:30,677 INFO L225 Difference]: With dead ends: 235 [2021-10-21 19:11:30,677 INFO L226 Difference]: Without dead ends: 235 [2021-10-21 19:11:30,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-21 19:11:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 200. [2021-10-21 19:11:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 163 states have (on average 1.6319018404907975) internal successors, (266), 180 states have internal predecessors, (266), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-21 19:11:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 296 transitions. [2021-10-21 19:11:30,689 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 296 transitions. Word has length 14 [2021-10-21 19:11:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:30,689 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 296 transitions. [2021-10-21 19:11:30,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 296 transitions. [2021-10-21 19:11:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:11:30,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:30,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:30,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:11:30,691 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:30,692 INFO L82 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-10-21 19:11:30,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:30,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47276304] [2021-10-21 19:11:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:30,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:30,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:30,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47276304] [2021-10-21 19:11:30,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47276304] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:30,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:30,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:11:30,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144310491] [2021-10-21 19:11:30,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:11:30,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:11:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:11:30,792 INFO L87 Difference]: Start difference. First operand 200 states and 296 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:31,055 INFO L93 Difference]: Finished difference Result 367 states and 512 transitions. [2021-10-21 19:11:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:11:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:11:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:31,063 INFO L225 Difference]: With dead ends: 367 [2021-10-21 19:11:31,063 INFO L226 Difference]: Without dead ends: 367 [2021-10-21 19:11:31,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:11:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-21 19:11:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 341. [2021-10-21 19:11:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 276 states have (on average 1.5072463768115942) internal successors, (416), 305 states have internal predecessors, (416), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-10-21 19:11:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2021-10-21 19:11:31,098 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 15 [2021-10-21 19:11:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:31,098 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2021-10-21 19:11:31,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2021-10-21 19:11:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:11:31,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:31,105 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:31,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:11:31,106 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-10-21 19:11:31,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:31,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757111137] [2021-10-21 19:11:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:31,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:31,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757111137] [2021-10-21 19:11:31,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757111137] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:31,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359856010] [2021-10-21 19:11:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:31,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:31,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:11:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:11:31,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:31,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359856010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:31,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:31,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-21 19:11:31,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591620023] [2021-10-21 19:11:31,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:11:31,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:31,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:11:31,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:11:31,708 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:11:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:32,627 INFO L93 Difference]: Finished difference Result 431 states and 610 transitions. [2021-10-21 19:11:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:11:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-10-21 19:11:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:32,631 INFO L225 Difference]: With dead ends: 431 [2021-10-21 19:11:32,631 INFO L226 Difference]: Without dead ends: 431 [2021-10-21 19:11:32,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:11:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-10-21 19:11:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 355. [2021-10-21 19:11:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 281 states have (on average 1.4697508896797153) internal successors, (413), 319 states have internal predecessors, (413), 22 states have call successors, (22), 22 states have call predecessors, (22), 40 states have return successors, (53), 13 states have call predecessors, (53), 21 states have call successors, (53) [2021-10-21 19:11:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 488 transitions. [2021-10-21 19:11:32,664 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 488 transitions. Word has length 22 [2021-10-21 19:11:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:32,664 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 488 transitions. [2021-10-21 19:11:32,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:11:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 488 transitions. [2021-10-21 19:11:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:11:32,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:32,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:32,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:32,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:32,895 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:32,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1528489980, now seen corresponding path program 1 times [2021-10-21 19:11:32,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:32,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720699186] [2021-10-21 19:11:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:32,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:33,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:33,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720699186] [2021-10-21 19:11:33,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720699186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:33,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956015563] [2021-10-21 19:11:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:33,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:33,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:33,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:11:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:11:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:33,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956015563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:33,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:33,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-21 19:11:33,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52155261] [2021-10-21 19:11:33,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:11:33,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:11:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:11:33,416 INFO L87 Difference]: Start difference. First operand 355 states and 488 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:11:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:34,273 INFO L93 Difference]: Finished difference Result 623 states and 847 transitions. [2021-10-21 19:11:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:11:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-10-21 19:11:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:34,281 INFO L225 Difference]: With dead ends: 623 [2021-10-21 19:11:34,281 INFO L226 Difference]: Without dead ends: 623 [2021-10-21 19:11:34,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 476.4ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:11:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-10-21 19:11:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 530. [2021-10-21 19:11:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 416 states have (on average 1.4254807692307692) internal successors, (593), 478 states have internal predecessors, (593), 32 states have call successors, (32), 32 states have call predecessors, (32), 70 states have return successors, (91), 19 states have call predecessors, (91), 31 states have call successors, (91) [2021-10-21 19:11:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 716 transitions. [2021-10-21 19:11:34,317 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 716 transitions. Word has length 24 [2021-10-21 19:11:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:34,318 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 716 transitions. [2021-10-21 19:11:34,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:11:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 716 transitions. [2021-10-21 19:11:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:11:34,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:34,322 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:34,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:34,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:34,538 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -358281637, now seen corresponding path program 1 times [2021-10-21 19:11:34,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:34,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92304579] [2021-10-21 19:11:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:34,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:34,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:34,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:34,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:11:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:11:34,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:34,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92304579] [2021-10-21 19:11:34,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92304579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:34,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263358074] [2021-10-21 19:11:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:34,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:34,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:34,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:11:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:34,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:11:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:35,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263358074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:35,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:35,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-10-21 19:11:35,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729604371] [2021-10-21 19:11:35,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:11:35,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:35,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:11:35,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:11:35,280 INFO L87 Difference]: Start difference. First operand 530 states and 716 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:11:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:36,378 INFO L93 Difference]: Finished difference Result 1727 states and 2420 transitions. [2021-10-21 19:11:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:11:36,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-10-21 19:11:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:36,390 INFO L225 Difference]: With dead ends: 1727 [2021-10-21 19:11:36,391 INFO L226 Difference]: Without dead ends: 1727 [2021-10-21 19:11:36,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 605.2ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:11:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-10-21 19:11:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1484. [2021-10-21 19:11:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1196 states have (on average 1.4088628762541806) internal successors, (1685), 1336 states have internal predecessors, (1685), 92 states have call successors, (92), 92 states have call predecessors, (92), 184 states have return successors, (271), 55 states have call predecessors, (271), 91 states have call successors, (271) [2021-10-21 19:11:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2048 transitions. [2021-10-21 19:11:36,464 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2048 transitions. Word has length 35 [2021-10-21 19:11:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:36,465 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2048 transitions. [2021-10-21 19:11:36,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:11:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2048 transitions. [2021-10-21 19:11:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:11:36,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:36,469 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:36,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:36,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:36,693 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-10-21 19:11:36,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:36,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706870451] [2021-10-21 19:11:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:36,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:36,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:36,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:36,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:11:36,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:36,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706870451] [2021-10-21 19:11:36,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706870451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:36,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441749741] [2021-10-21 19:11:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:36,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:36,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:36,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:36,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:11:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:11:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:11:37,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441749741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:37,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:37,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-21 19:11:37,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441048766] [2021-10-21 19:11:37,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:11:37,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:37,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:11:37,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:11:37,260 INFO L87 Difference]: Start difference. First operand 1484 states and 2048 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:11:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:38,204 INFO L93 Difference]: Finished difference Result 2098 states and 3033 transitions. [2021-10-21 19:11:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:11:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-10-21 19:11:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:38,219 INFO L225 Difference]: With dead ends: 2098 [2021-10-21 19:11:38,219 INFO L226 Difference]: Without dead ends: 2098 [2021-10-21 19:11:38,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:11:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-10-21 19:11:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1836. [2021-10-21 19:11:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1471 states have (on average 1.399048266485384) internal successors, (2058), 1652 states have internal predecessors, (2058), 128 states have call successors, (128), 110 states have call predecessors, (128), 225 states have return successors, (377), 73 states have call predecessors, (377), 127 states have call successors, (377) [2021-10-21 19:11:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2563 transitions. [2021-10-21 19:11:38,313 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2563 transitions. Word has length 36 [2021-10-21 19:11:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:38,314 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 2563 transitions. [2021-10-21 19:11:38,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:11:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2563 transitions. [2021-10-21 19:11:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:11:38,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:38,317 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:38,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:38,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:11:38,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:38,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1424599507, now seen corresponding path program 1 times [2021-10-21 19:11:38,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:38,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670295504] [2021-10-21 19:11:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:38,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:38,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:38,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:11:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:11:38,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:38,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670295504] [2021-10-21 19:11:38,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670295504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:38,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564690900] [2021-10-21 19:11:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:38,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:38,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:38,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:38,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:11:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:11:39,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:11:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564690900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:39,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:39,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-10-21 19:11:39,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915986363] [2021-10-21 19:11:39,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:11:39,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:39,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:11:39,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:11:39,254 INFO L87 Difference]: Start difference. First operand 1836 states and 2563 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:11:40,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:40,279 INFO L93 Difference]: Finished difference Result 1171 states and 1534 transitions. [2021-10-21 19:11:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:11:40,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-10-21 19:11:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:40,287 INFO L225 Difference]: With dead ends: 1171 [2021-10-21 19:11:40,287 INFO L226 Difference]: Without dead ends: 1073 [2021-10-21 19:11:40,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 640.7ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:11:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-10-21 19:11:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 906. [2021-10-21 19:11:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 714 states have (on average 1.3389355742296918) internal successors, (956), 802 states have internal predecessors, (956), 76 states have call successors, (76), 64 states have call predecessors, (76), 104 states have return successors, (157), 39 states have call predecessors, (157), 75 states have call successors, (157) [2021-10-21 19:11:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1189 transitions. [2021-10-21 19:11:40,329 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1189 transitions. Word has length 38 [2021-10-21 19:11:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:40,331 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1189 transitions. [2021-10-21 19:11:40,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:11:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1189 transitions. [2021-10-21 19:11:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:11:40,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:40,334 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:40,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:40,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:11:40,550 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-10-21 19:11:40,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:40,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203845949] [2021-10-21 19:11:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:40,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:11:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:11:40,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:40,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203845949] [2021-10-21 19:11:40,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203845949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:40,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630277791] [2021-10-21 19:11:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:40,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:40,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:11:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:41,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:11:41,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:11:41,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630277791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:41,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:41,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-21 19:11:41,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831177271] [2021-10-21 19:11:41,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:11:41,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:41,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:11:41,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:11:41,239 INFO L87 Difference]: Start difference. First operand 906 states and 1189 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:11:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:42,498 INFO L93 Difference]: Finished difference Result 1632 states and 2214 transitions. [2021-10-21 19:11:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:11:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-10-21 19:11:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:42,509 INFO L225 Difference]: With dead ends: 1632 [2021-10-21 19:11:42,509 INFO L226 Difference]: Without dead ends: 1632 [2021-10-21 19:11:42,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:11:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-10-21 19:11:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1297. [2021-10-21 19:11:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1034 states have (on average 1.3549323017408124) internal successors, (1401), 1157 states have internal predecessors, (1401), 100 states have call successors, (100), 88 states have call predecessors, (100), 151 states have return successors, (209), 51 states have call predecessors, (209), 99 states have call successors, (209) [2021-10-21 19:11:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1710 transitions. [2021-10-21 19:11:42,562 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1710 transitions. Word has length 47 [2021-10-21 19:11:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:42,563 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1710 transitions. [2021-10-21 19:11:42,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:11:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1710 transitions. [2021-10-21 19:11:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:11:42,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:42,565 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:42,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:42,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:11:42,780 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-10-21 19:11:42,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:42,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017716850] [2021-10-21 19:11:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:42,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:11:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:42,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:11:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:11:43,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:43,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017716850] [2021-10-21 19:11:43,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017716850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:43,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950505888] [2021-10-21 19:11:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:43,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:43,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:43,015 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:43,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:11:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:11:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:11:43,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950505888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:43,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:43,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-10-21 19:11:43,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231286235] [2021-10-21 19:11:43,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:11:43,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:11:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:11:43,533 INFO L87 Difference]: Start difference. First operand 1297 states and 1710 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:11:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:44,161 INFO L93 Difference]: Finished difference Result 1831 states and 2507 transitions. [2021-10-21 19:11:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:11:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-10-21 19:11:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:44,174 INFO L225 Difference]: With dead ends: 1831 [2021-10-21 19:11:44,174 INFO L226 Difference]: Without dead ends: 1831 [2021-10-21 19:11:44,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:11:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-10-21 19:11:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1321. [2021-10-21 19:11:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1046 states have (on average 1.3508604206500956) internal successors, (1413), 1181 states have internal predecessors, (1413), 100 states have call successors, (100), 88 states have call predecessors, (100), 163 states have return successors, (233), 51 states have call predecessors, (233), 99 states have call successors, (233) [2021-10-21 19:11:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1746 transitions. [2021-10-21 19:11:44,228 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1746 transitions. Word has length 58 [2021-10-21 19:11:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:44,229 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1746 transitions. [2021-10-21 19:11:44,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:11:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1746 transitions. [2021-10-21 19:11:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:11:44,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:44,231 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:44,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:44,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:11:44,458 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-10-21 19:11:44,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:44,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431562064] [2021-10-21 19:11:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:44,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:44,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:44,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:44,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:44,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:11:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:44,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-21 19:11:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:11:44,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:44,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431562064] [2021-10-21 19:11:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431562064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:44,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578259525] [2021-10-21 19:11:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:44,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:44,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:44,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:11:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:11:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:11:45,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578259525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:45,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:45,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-21 19:11:45,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118473430] [2021-10-21 19:11:45,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:11:45,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:11:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:11:45,340 INFO L87 Difference]: Start difference. First operand 1321 states and 1746 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-21 19:11:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:53,920 INFO L93 Difference]: Finished difference Result 5435 states and 7408 transitions. [2021-10-21 19:11:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-10-21 19:11:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2021-10-21 19:11:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:53,956 INFO L225 Difference]: With dead ends: 5435 [2021-10-21 19:11:53,956 INFO L226 Difference]: Without dead ends: 5343 [2021-10-21 19:11:53,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 5329.6ms TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-10-21 19:11:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-10-21 19:11:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4426. [2021-10-21 19:11:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 3518 states have (on average 1.3328595793064242) internal successors, (4689), 3956 states have internal predecessors, (4689), 340 states have call successors, (340), 298 states have call predecessors, (340), 557 states have return successors, (939), 171 states have call predecessors, (939), 339 states have call successors, (939) [2021-10-21 19:11:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 5968 transitions. [2021-10-21 19:11:54,167 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 5968 transitions. Word has length 60 [2021-10-21 19:11:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:54,168 INFO L470 AbstractCegarLoop]: Abstraction has 4426 states and 5968 transitions. [2021-10-21 19:11:54,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-21 19:11:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 5968 transitions. [2021-10-21 19:11:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:11:54,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:54,170 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:54,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:54,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:54,387 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:54,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-10-21 19:11:54,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:54,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886723694] [2021-10-21 19:11:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:54,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:11:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-21 19:11:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:11:54,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:54,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886723694] [2021-10-21 19:11:54,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886723694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:54,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122552245] [2021-10-21 19:11:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:54,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:54,594 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:54,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:11:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:54,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:11:54,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:11:55,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122552245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:55,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:55,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-10-21 19:11:55,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254080590] [2021-10-21 19:11:55,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:11:55,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:11:55,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:11:55,145 INFO L87 Difference]: Start difference. First operand 4426 states and 5968 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-21 19:11:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:56,756 INFO L93 Difference]: Finished difference Result 9129 states and 12769 transitions. [2021-10-21 19:11:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 19:11:56,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2021-10-21 19:11:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:56,814 INFO L225 Difference]: With dead ends: 9129 [2021-10-21 19:11:56,815 INFO L226 Difference]: Without dead ends: 9129 [2021-10-21 19:11:56,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 915.0ms TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 19:11:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-10-21 19:11:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7078. [2021-10-21 19:11:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 5734 states have (on average 1.3566445762120685) internal successors, (7779), 6356 states have internal predecessors, (7779), 508 states have call successors, (508), 466 states have call predecessors, (508), 825 states have return successors, (1407), 255 states have call predecessors, (1407), 507 states have call successors, (1407) [2021-10-21 19:11:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 9694 transitions. [2021-10-21 19:11:57,110 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 9694 transitions. Word has length 60 [2021-10-21 19:11:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:57,112 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 9694 transitions. [2021-10-21 19:11:57,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-21 19:11:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 9694 transitions. [2021-10-21 19:11:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-21 19:11:57,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:57,115 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:57,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:57,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:57,338 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:11:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:57,339 INFO L82 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-10-21 19:11:57,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:57,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523023985] [2021-10-21 19:11:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:57,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:11:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:11:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:11:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-21 19:11:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 19:11:57,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:57,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523023985] [2021-10-21 19:11:57,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523023985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:57,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933753380] [2021-10-21 19:11:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:57,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:57,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:57,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:57,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:11:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:57,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:11:57,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-21 19:11:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933753380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:58,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:58,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-10-21 19:11:58,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475661852] [2021-10-21 19:11:58,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:11:58,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:58,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:11:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:11:58,266 INFO L87 Difference]: Start difference. First operand 7078 states and 9694 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:12:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:00,045 INFO L93 Difference]: Finished difference Result 9161 states and 12559 transitions. [2021-10-21 19:12:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:12:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 71 [2021-10-21 19:12:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:00,087 INFO L225 Difference]: With dead ends: 9161 [2021-10-21 19:12:00,087 INFO L226 Difference]: Without dead ends: 9075 [2021-10-21 19:12:00,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1222.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:12:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2021-10-21 19:12:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 8506. [2021-10-21 19:12:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 6792 states have (on average 1.3308303886925794) internal successors, (9039), 7616 states have internal predecessors, (9039), 676 states have call successors, (676), 550 states have call predecessors, (676), 1027 states have return successors, (1959), 339 states have call predecessors, (1959), 675 states have call successors, (1959) [2021-10-21 19:12:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11674 transitions. [2021-10-21 19:12:00,383 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11674 transitions. Word has length 71 [2021-10-21 19:12:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:00,384 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 11674 transitions. [2021-10-21 19:12:00,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:12:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11674 transitions. [2021-10-21 19:12:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:12:00,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:00,389 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:00,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:00,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:00,602 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:00,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-10-21 19:12:00,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:00,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554332342] [2021-10-21 19:12:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:00,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:12:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:12:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:12:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:12:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:12:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-10-21 19:12:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-10-21 19:12:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-21 19:12:00,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:00,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554332342] [2021-10-21 19:12:00,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554332342] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:00,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457812188] [2021-10-21 19:12:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:00,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:00,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:00,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:12:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:12:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 19:12:01,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457812188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:01,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:01,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-10-21 19:12:01,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191572206] [2021-10-21 19:12:01,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:12:01,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:12:01,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:12:01,500 INFO L87 Difference]: Start difference. First operand 8506 states and 11674 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:12:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:02,412 INFO L93 Difference]: Finished difference Result 11210 states and 15593 transitions. [2021-10-21 19:12:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:12:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-10-21 19:12:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:02,450 INFO L225 Difference]: With dead ends: 11210 [2021-10-21 19:12:02,450 INFO L226 Difference]: Without dead ends: 11210 [2021-10-21 19:12:02,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:12:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11210 states. [2021-10-21 19:12:02,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11210 to 8506. [2021-10-21 19:12:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 6792 states have (on average 1.3308303886925794) internal successors, (9039), 7616 states have internal predecessors, (9039), 676 states have call successors, (676), 550 states have call predecessors, (676), 1027 states have return successors, (1959), 339 states have call predecessors, (1959), 675 states have call successors, (1959) [2021-10-21 19:12:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11674 transitions. [2021-10-21 19:12:02,743 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11674 transitions. Word has length 82 [2021-10-21 19:12:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:02,743 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 11674 transitions. [2021-10-21 19:12:02,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:12:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11674 transitions. [2021-10-21 19:12:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:12:02,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:02,752 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:02,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:02,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:02,967 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-10-21 19:12:02,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:02,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521317147] [2021-10-21 19:12:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:02,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:12:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:12:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:12:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:12:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-21 19:12:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-21 19:12:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-10-21 19:12:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 19:12:03,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:03,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521317147] [2021-10-21 19:12:03,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521317147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:03,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266365858] [2021-10-21 19:12:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:03,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:03,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:03,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:12:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:12:03,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 19:12:03,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266365858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:03,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:03,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-21 19:12:03,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838029180] [2021-10-21 19:12:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:12:03,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:12:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:12:03,956 INFO L87 Difference]: Start difference. First operand 8506 states and 11674 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:12:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:06,528 INFO L93 Difference]: Finished difference Result 13729 states and 18929 transitions. [2021-10-21 19:12:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-21 19:12:06,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 84 [2021-10-21 19:12:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:06,572 INFO L225 Difference]: With dead ends: 13729 [2021-10-21 19:12:06,572 INFO L226 Difference]: Without dead ends: 13093 [2021-10-21 19:12:06,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1857.3ms TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 19:12:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13093 states. [2021-10-21 19:12:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13093 to 8840. [2021-10-21 19:12:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8840 states, 7064 states have (on average 1.3180917327293318) internal successors, (9311), 7908 states have internal predecessors, (9311), 676 states have call successors, (676), 592 states have call predecessors, (676), 1089 states have return successors, (2001), 339 states have call predecessors, (2001), 675 states have call successors, (2001) [2021-10-21 19:12:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8840 states to 8840 states and 11988 transitions. [2021-10-21 19:12:06,868 INFO L78 Accepts]: Start accepts. Automaton has 8840 states and 11988 transitions. Word has length 84 [2021-10-21 19:12:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:06,868 INFO L470 AbstractCegarLoop]: Abstraction has 8840 states and 11988 transitions. [2021-10-21 19:12:06,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-21 19:12:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8840 states and 11988 transitions. [2021-10-21 19:12:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:12:06,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:06,871 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:06,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:07,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:07,089 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-10-21 19:12:07,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:07,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184381885] [2021-10-21 19:12:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:07,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:12:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:12:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:12:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:12:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-10-21 19:12:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-21 19:12:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-21 19:12:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-10-21 19:12:07,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:07,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184381885] [2021-10-21 19:12:07,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184381885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:07,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355446754] [2021-10-21 19:12:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:07,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:07,290 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:07,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:12:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:12:07,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-21 19:12:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355446754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:07,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:07,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-21 19:12:07,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493017491] [2021-10-21 19:12:07,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:12:07,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:12:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:12:07,965 INFO L87 Difference]: Start difference. First operand 8840 states and 11988 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:12:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:09,388 INFO L93 Difference]: Finished difference Result 7383 states and 9497 transitions. [2021-10-21 19:12:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 19:12:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 84 [2021-10-21 19:12:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:09,409 INFO L225 Difference]: With dead ends: 7383 [2021-10-21 19:12:09,409 INFO L226 Difference]: Without dead ends: 6879 [2021-10-21 19:12:09,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 833.9ms TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:12:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6879 states. [2021-10-21 19:12:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6879 to 6570. [2021-10-21 19:12:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 5270 states have (on average 1.276470588235294) internal successors, (6727), 5848 states have internal predecessors, (6727), 508 states have call successors, (508), 466 states have call predecessors, (508), 781 states have return successors, (1239), 255 states have call predecessors, (1239), 507 states have call successors, (1239) [2021-10-21 19:12:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 8474 transitions. [2021-10-21 19:12:09,599 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 8474 transitions. Word has length 84 [2021-10-21 19:12:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:09,599 INFO L470 AbstractCegarLoop]: Abstraction has 6570 states and 8474 transitions. [2021-10-21 19:12:09,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:12:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 8474 transitions. [2021-10-21 19:12:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-21 19:12:09,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:09,603 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:09,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:09,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:12:09,818 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-10-21 19:12:09,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:09,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687339059] [2021-10-21 19:12:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:09,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:12:09,868 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:12:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:12:09,983 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:12:09,983 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:12:09,984 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:12:09,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-21 19:12:09,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-21 19:12:09,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-21 19:12:09,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-21 19:12:09,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-21 19:12:09,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-21 19:12:09,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-21 19:12:09,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-21 19:12:09,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-21 19:12:09,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-21 19:12:09,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-21 19:12:09,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-21 19:12:09,990 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-21 19:12:09,990 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-21 19:12:09,990 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:12:09,990 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:12:09,991 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:12:09,991 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:12:09,991 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:12:09,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 19:12:10,000 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:12:10,047 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 19:12:10,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:12:10 BoogieIcfgContainer [2021-10-21 19:12:10,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:12:10,122 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:12:10,122 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:12:10,123 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:12:10,123 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:26" (3/4) ... [2021-10-21 19:12:10,126 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:12:10,126 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:12:10,127 INFO L168 Benchmark]: Toolchain (without parser) took 44634.53 ms. Allocated memory was 90.2 MB in the beginning and 461.4 MB in the end (delta: 371.2 MB). Free memory was 55.1 MB in the beginning and 197.2 MB in the end (delta: -142.1 MB). Peak memory consumption was 228.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:12:10,128 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 90.2 MB. Free memory was 60.6 MB in the beginning and 60.6 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:12:10,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 545.38 ms. Allocated memory is still 90.2 MB. Free memory was 54.9 MB in the beginning and 59.2 MB in the end (delta: -4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:12:10,129 INFO L168 Benchmark]: Boogie Preprocessor took 70.77 ms. Allocated memory is still 90.2 MB. Free memory was 59.2 MB in the beginning and 56.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:12:10,130 INFO L168 Benchmark]: RCFGBuilder took 788.28 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 56.5 MB in the beginning and 78.4 MB in the end (delta: -22.0 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:12:10,130 INFO L168 Benchmark]: TraceAbstraction took 43214.05 ms. Allocated memory was 109.1 MB in the beginning and 461.4 MB in the end (delta: 352.3 MB). Free memory was 78.4 MB in the beginning and 197.2 MB in the end (delta: -118.8 MB). Peak memory consumption was 231.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:12:10,130 INFO L168 Benchmark]: Witness Printer took 3.89 ms. Allocated memory is still 461.4 MB. Free memory is still 197.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:12:10,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 90.2 MB. Free memory was 60.6 MB in the beginning and 60.6 MB in the end (delta: 25.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 545.38 ms. Allocated memory is still 90.2 MB. Free memory was 54.9 MB in the beginning and 59.2 MB in the end (delta: -4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.77 ms. Allocated memory is still 90.2 MB. Free memory was 59.2 MB in the beginning and 56.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 788.28 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 56.5 MB in the beginning and 78.4 MB in the end (delta: -22.0 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 43214.05 ms. Allocated memory was 109.1 MB in the beginning and 461.4 MB in the end (delta: 352.3 MB). Free memory was 78.4 MB in the beginning and 197.2 MB in the end (delta: -118.8 MB). Peak memory consumption was 231.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.89 ms. Allocated memory is still 461.4 MB. Free memory is still 197.2 MB. There was no memory consumed. Max. memory is 16.1 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=54, \old(garbage)=49, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=55, \old(S)=57, \old(t1)=70, \old(t1)=62, \old(t4)=58, \old(t4)=53, \old(x1)=61, \old(x1)=74, \old(x4)=51, \old(x4)=68, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc1++=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=0, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 43016.4ms, OverallIterations: 23, TraceHistogramMax: 7, EmptinessCheckTime: 65.6ms, AutomataDifference: 26512.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1947 SDtfs, 6771 SDslu, 4282 SDs, 0 SdLazy, 13799 SolverSat, 2709 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10228.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1494 GetRequests, 891 SyntacticMatches, 2 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14297 ImplicationChecksByTransitivity, 15169.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8840occurred in iteration=21, InterpolantAutomatonStates: 533, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2121.4ms AutomataMinimizationTime, 22 MinimizatonAttempts, 12685 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 368.6ms SsaConstructionTime, 1146.0ms SatisfiabilityAnalysisTime, 6848.3ms InterpolantComputationTime, 1594 NumberOfCodeBlocks, 1594 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1474 ConstructedInterpolants, 0 QuantifiedInterpolants, 6919 SizeOfPredicates, 58 NumberOfNonLiveVariables, 6597 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 1332/1656 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 19:12:10,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:12:12,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:12:12,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:12:12,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:12:12,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:12:12,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:12:12,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:12:12,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:12:12,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:12:12,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:12:12,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:12:12,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:12:12,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:12:12,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:12:12,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:12:12,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:12:12,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:12:12,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:12:12,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:12:12,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:12:12,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:12:12,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:12:12,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:12:12,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:12:12,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:12:12,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:12:12,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:12:12,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:12:12,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:12:12,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-10-21 19:12:12,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:12:12,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:12:12,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:12:12,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-21 19:12:12,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:12:12,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:12:12,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:12:12,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:12:12,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:12:12,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:12:12,812 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:12:12,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:12:12,814 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:12:12,814 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:12:12,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:12:12,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:12:12,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:12:12,816 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:12:12,816 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:12:12,816 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:12:12,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:12:12,817 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:12:12,817 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:12:12,817 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:12:12,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:12:12,817 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:12:12,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:12:12,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:12:12,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:12:12,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:12:12,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:12:12,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:12:12,819 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:12:12,819 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:12:12,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:12:12,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:12:12,820 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f [2021-10-21 19:12:13,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:12:13,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:12:13,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:12:13,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:12:13,235 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:12:13,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-21 19:12:13,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/5f6ac9e3e/4adea8a43bea44119c77bc596435629d/FLAGb3a9de5e3 [2021-10-21 19:12:13,943 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:12:13,948 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-10-21 19:12:13,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/5f6ac9e3e/4adea8a43bea44119c77bc596435629d/FLAGb3a9de5e3 [2021-10-21 19:12:14,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/data/5f6ac9e3e/4adea8a43bea44119c77bc596435629d [2021-10-21 19:12:14,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:12:14,231 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:12:14,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:12:14,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:12:14,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:12:14,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6bc27c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14, skipping insertion in model container [2021-10-21 19:12:14,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:12:14,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:12:14,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:12:14,622 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:12:14,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:12:14,719 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:12:14,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14 WrapperNode [2021-10-21 19:12:14,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:12:14,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:12:14,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:12:14,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:12:14,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:12:14,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:12:14,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:12:14,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:12:14,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (1/1) ... [2021-10-21 19:12:14,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:12:14,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:14,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:12:14,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:12:14,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:12:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:12:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:12:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:12:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:12:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:12:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:12:14,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:12:14,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:12:14,891 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-10-21 19:12:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-10-21 19:12:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:12:14,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:12:14,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:12:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:12:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:12:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:12:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:12:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:12:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:12:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:12:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:12:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:12:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:12:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:12:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:12:14,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:12:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:12:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:12:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:12:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:12:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:12:14,896 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:12:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:12:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:12:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:12:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:12:14,897 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:12:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:12:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:12:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:12:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:12:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:12:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:12:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:12:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:12:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:12:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:12:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:12:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:12:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:12:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:12:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:12:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:12:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:12:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:12:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:12:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:12:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:12:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:12:14,903 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:12:14,904 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:12:14,904 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:12:14,904 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:12:14,905 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:12:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:12:14,906 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:12:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:12:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:12:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:12:14,907 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:12:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:12:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:12:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:12:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:12:14,908 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:12:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:12:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:12:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:12:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:12:14,909 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:12:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:12:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:12:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:12:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:12:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:12:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:12:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:12:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:12:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:12:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:12:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:12:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:12:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:12:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:12:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:12:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:12:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:12:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:12:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:12:14,913 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:12:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:12:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:12:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:12:14,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:12:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:12:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:12:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:12:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:12:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:12:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:12:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:12:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:12:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:12:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:12:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:12:14,917 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:12:14,918 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:12:14,918 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:12:14,918 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:12:14,918 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:12:14,918 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:12:14,919 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:12:14,919 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:12:14,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:12:14,920 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-10-21 19:12:14,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:12:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:12:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:12:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-10-21 19:12:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:12:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:12:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:12:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:12:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:12:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:12:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:12:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:12:14,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 19:12:14,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 19:12:15,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:12:15,812 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:12:15,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:12:15 BoogieIcfgContainer [2021-10-21 19:12:15,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:12:15,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:12:15,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:12:15,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:12:15,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:12:14" (1/3) ... [2021-10-21 19:12:15,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be6ba0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:12:15, skipping insertion in model container [2021-10-21 19:12:15,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:14" (2/3) ... [2021-10-21 19:12:15,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be6ba0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:12:15, skipping insertion in model container [2021-10-21 19:12:15,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:12:15" (3/3) ... [2021-10-21 19:12:15,824 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2021-10-21 19:12:15,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:12:15,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-10-21 19:12:15,885 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:12:15,894 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:12:15,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-21 19:12:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:12:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:12:15,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:15,928 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:15,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-10-21 19:12:15,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:15,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339798098] [2021-10-21 19:12:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:15,948 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:15,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:15,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:12:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 19:12:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:16,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:16,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:16,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339798098] [2021-10-21 19:12:16,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339798098] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:16,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:16,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:12:16,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771335299] [2021-10-21 19:12:16,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:12:16,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:12:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:12:16,345 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:16,394 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-10-21 19:12:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:12:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-21 19:12:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:16,405 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:12:16,405 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 19:12:16,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:12:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 19:12:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 19:12:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:12:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-10-21 19:12:16,471 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-10-21 19:12:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:16,472 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-10-21 19:12:16,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-10-21 19:12:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:12:16,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:16,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:16,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:16,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:16,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-10-21 19:12:16,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:16,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710629553] [2021-10-21 19:12:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:16,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:16,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:16,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:16,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:12:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:12:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:17,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:17,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:17,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710629553] [2021-10-21 19:12:17,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710629553] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:17,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:17,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 19:12:17,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819063302] [2021-10-21 19:12:17,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:12:17,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:12:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:17,105 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:17,184 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-10-21 19:12:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:12:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-21 19:12:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:17,189 INFO L225 Difference]: With dead ends: 120 [2021-10-21 19:12:17,190 INFO L226 Difference]: Without dead ends: 120 [2021-10-21 19:12:17,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-21 19:12:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-10-21 19:12:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:12:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-10-21 19:12:17,227 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-10-21 19:12:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:17,228 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-10-21 19:12:17,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-10-21 19:12:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:12:17,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:17,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:17,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:17,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:17,451 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:17,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-10-21 19:12:17,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:17,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026510534] [2021-10-21 19:12:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:17,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:17,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:17,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:17,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:12:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:17,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:12:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:17,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:17,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:17,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026510534] [2021-10-21 19:12:17,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026510534] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:17,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:17,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:12:17,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894716764] [2021-10-21 19:12:17,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:12:17,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:12:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:17,686 INFO L87 Difference]: Start difference. First operand 102 states and 145 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:17,829 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-10-21 19:12:17,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:12:17,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-21 19:12:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:17,833 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:12:17,833 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:12:17,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:12:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-10-21 19:12:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:12:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-10-21 19:12:17,860 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-10-21 19:12:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:17,861 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-10-21 19:12:17,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-10-21 19:12:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:12:17,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:17,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:17,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:18,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:18,073 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:18,074 INFO L82 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-10-21 19:12:18,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:18,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139183025] [2021-10-21 19:12:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:18,076 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:18,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:18,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:18,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:12:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:18,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:12:18,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:18,347 INFO L388 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 [2021-10-21 19:12:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:18,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:18,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:18,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139183025] [2021-10-21 19:12:18,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139183025] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:18,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:18,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:12:18,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563952284] [2021-10-21 19:12:18,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:12:18,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:12:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:18,397 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:18,566 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-10-21 19:12:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:12:18,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:12:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:18,575 INFO L225 Difference]: With dead ends: 198 [2021-10-21 19:12:18,575 INFO L226 Difference]: Without dead ends: 198 [2021-10-21 19:12:18,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-21 19:12:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-10-21 19:12:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-10-21 19:12:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-10-21 19:12:18,611 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-10-21 19:12:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:18,612 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-10-21 19:12:18,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-10-21 19:12:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:12:18,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:18,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:18,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:18,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:18,825 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-10-21 19:12:18,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:18,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908561207] [2021-10-21 19:12:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:18,827 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:18,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:18,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 19:12:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:12:19,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:19,086 INFO L388 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 [2021-10-21 19:12:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:19,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:19,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:19,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908561207] [2021-10-21 19:12:19,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908561207] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:19,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:19,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-21 19:12:19,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911229879] [2021-10-21 19:12:19,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:12:19,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:12:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:12:19,193 INFO L87 Difference]: Start difference. First operand 177 states and 276 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:19,471 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-10-21 19:12:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:12:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:12:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:19,478 INFO L225 Difference]: With dead ends: 333 [2021-10-21 19:12:19,478 INFO L226 Difference]: Without dead ends: 333 [2021-10-21 19:12:19,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:12:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-10-21 19:12:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-10-21 19:12:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-10-21 19:12:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-10-21 19:12:19,510 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-10-21 19:12:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:19,511 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-10-21 19:12:19,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-10-21 19:12:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:12:19,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:19,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:19,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-21 19:12:19,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:19,723 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:19,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-10-21 19:12:19,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:19,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608071260] [2021-10-21 19:12:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:19,724 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:19,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:19,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:19,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 19:12:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:12:19,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:19,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:20,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:20,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608071260] [2021-10-21 19:12:20,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608071260] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:20,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:20,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 19:12:20,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383686818] [2021-10-21 19:12:20,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:12:20,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:12:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:12:20,016 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:20,062 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-10-21 19:12:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:12:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 19:12:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:20,066 INFO L225 Difference]: With dead ends: 197 [2021-10-21 19:12:20,066 INFO L226 Difference]: Without dead ends: 197 [2021-10-21 19:12:20,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:12:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-21 19:12:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-10-21 19:12:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-21 19:12:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-10-21 19:12:20,100 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-10-21 19:12:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:20,100 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-10-21 19:12:20,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-10-21 19:12:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:12:20,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:20,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:20,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:20,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:20,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-10-21 19:12:20,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:20,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177909701] [2021-10-21 19:12:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:20,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:20,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:20,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 19:12:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:12:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:20,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:20,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:20,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177909701] [2021-10-21 19:12:20,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177909701] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:20,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:20,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 19:12:20,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703483756] [2021-10-21 19:12:20,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:12:20,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:12:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:12:20,601 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:20,638 INFO L93 Difference]: Finished difference Result 281 states and 404 transitions. [2021-10-21 19:12:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:12:20,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:12:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:20,644 INFO L225 Difference]: With dead ends: 281 [2021-10-21 19:12:20,644 INFO L226 Difference]: Without dead ends: 281 [2021-10-21 19:12:20,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:12:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-10-21 19:12:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-10-21 19:12:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-10-21 19:12:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-10-21 19:12:20,680 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-10-21 19:12:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:20,680 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-10-21 19:12:20,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-10-21 19:12:20,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:12:20,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:20,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:20,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-21 19:12:20,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:20,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-10-21 19:12:20,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:20,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771121692] [2021-10-21 19:12:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:20,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:20,898 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:20,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 19:12:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:12:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:21,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:21,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:21,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771121692] [2021-10-21 19:12:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771121692] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:21,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:21,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-21 19:12:21,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627959290] [2021-10-21 19:12:21,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:12:21,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:12:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:12:21,435 INFO L87 Difference]: Start difference. First operand 281 states and 404 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:12:22,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:22,265 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-10-21 19:12:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:12:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-10-21 19:12:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:22,271 INFO L225 Difference]: With dead ends: 690 [2021-10-21 19:12:22,271 INFO L226 Difference]: Without dead ends: 690 [2021-10-21 19:12:22,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:12:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-21 19:12:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-10-21 19:12:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 472 states have (on average 1.5423728813559323) internal successors, (728), 520 states have internal predecessors, (728), 42 states have call successors, (42), 42 states have call predecessors, (42), 61 states have return successors, (95), 25 states have call predecessors, (95), 41 states have call successors, (95) [2021-10-21 19:12:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-10-21 19:12:22,306 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-10-21 19:12:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:22,307 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-10-21 19:12:22,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:12:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-10-21 19:12:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:12:22,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:22,308 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:22,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:22,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:22,523 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-10-21 19:12:22,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:22,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895810083] [2021-10-21 19:12:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:22,524 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:22,527 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:22,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 19:12:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:12:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:22,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:23,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:23,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895810083] [2021-10-21 19:12:23,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895810083] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:23,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:23,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-21 19:12:23,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477145756] [2021-10-21 19:12:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:12:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:23,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:12:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:12:23,084 INFO L87 Difference]: Start difference. First operand 587 states and 865 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:12:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:23,727 INFO L93 Difference]: Finished difference Result 909 states and 1312 transitions. [2021-10-21 19:12:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:12:23,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-10-21 19:12:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:23,736 INFO L225 Difference]: With dead ends: 909 [2021-10-21 19:12:23,737 INFO L226 Difference]: Without dead ends: 909 [2021-10-21 19:12:23,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:12:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-10-21 19:12:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 837. [2021-10-21 19:12:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 666 states have (on average 1.5015015015015014) internal successors, (1000), 738 states have internal predecessors, (1000), 62 states have call successors, (62), 62 states have call predecessors, (62), 97 states have return successors, (127), 37 states have call predecessors, (127), 61 states have call successors, (127) [2021-10-21 19:12:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1189 transitions. [2021-10-21 19:12:23,787 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1189 transitions. Word has length 20 [2021-10-21 19:12:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:23,788 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1189 transitions. [2021-10-21 19:12:23,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:12:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1189 transitions. [2021-10-21 19:12:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:12:23,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:23,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:23,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:24,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:24,008 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-10-21 19:12:24,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:24,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973742958] [2021-10-21 19:12:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:12:24,010 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:24,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:24,011 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:24,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-21 19:12:24,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:12:24,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:12:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:12:24,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:12:24,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:12:24,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:24,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973742958] [2021-10-21 19:12:24,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973742958] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:24,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:24,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-21 19:12:24,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861530050] [2021-10-21 19:12:24,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:12:24,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:12:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:12:24,537 INFO L87 Difference]: Start difference. First operand 837 states and 1189 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:12:24,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:24,791 INFO L93 Difference]: Finished difference Result 1159 states and 1597 transitions. [2021-10-21 19:12:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:12:24,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2021-10-21 19:12:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:24,800 INFO L225 Difference]: With dead ends: 1159 [2021-10-21 19:12:24,801 INFO L226 Difference]: Without dead ends: 1159 [2021-10-21 19:12:24,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:12:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-10-21 19:12:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1147. [2021-10-21 19:12:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 908 states have (on average 1.4405286343612336) internal successors, (1308), 1016 states have internal predecessors, (1308), 82 states have call successors, (82), 82 states have call predecessors, (82), 145 states have return successors, (195), 49 states have call predecessors, (195), 81 states have call successors, (195) [2021-10-21 19:12:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1585 transitions. [2021-10-21 19:12:24,844 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1585 transitions. Word has length 27 [2021-10-21 19:12:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:24,844 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1585 transitions. [2021-10-21 19:12:24,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:12:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1585 transitions. [2021-10-21 19:12:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:12:24,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:24,846 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:24,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:25,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:25,058 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-10-21 19:12:25,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:25,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515116044] [2021-10-21 19:12:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:25,060 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:25,061 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:25,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-21 19:12:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:12:25,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:25,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:26,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:26,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515116044] [2021-10-21 19:12:26,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515116044] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:26,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:26,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-21 19:12:26,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492955722] [2021-10-21 19:12:26,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:12:26,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:12:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:12:26,063 INFO L87 Difference]: Start difference. First operand 1147 states and 1585 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:12:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:26,957 INFO L93 Difference]: Finished difference Result 1680 states and 2280 transitions. [2021-10-21 19:12:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:12:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2021-10-21 19:12:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:26,968 INFO L225 Difference]: With dead ends: 1680 [2021-10-21 19:12:26,968 INFO L226 Difference]: Without dead ends: 1680 [2021-10-21 19:12:26,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:12:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-10-21 19:12:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-10-21 19:12:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1157 states have (on average 1.4079515989628348) internal successors, (1629), 1297 states have internal predecessors, (1629), 107 states have call successors, (107), 107 states have call predecessors, (107), 191 states have return successors, (265), 63 states have call predecessors, (265), 106 states have call successors, (265) [2021-10-21 19:12:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2001 transitions. [2021-10-21 19:12:27,025 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2001 transitions. Word has length 29 [2021-10-21 19:12:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:27,025 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2001 transitions. [2021-10-21 19:12:27,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:12:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2001 transitions. [2021-10-21 19:12:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:12:27,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:27,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:27,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:27,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:27,243 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:27,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-10-21 19:12:27,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:27,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277143565] [2021-10-21 19:12:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:27,245 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:27,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:27,246 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:27,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-21 19:12:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:12:27,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:12:27,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:27,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:27,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277143565] [2021-10-21 19:12:27,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277143565] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:27,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:27,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-10-21 19:12:27,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203030761] [2021-10-21 19:12:27,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:12:27,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:12:27,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:12:27,983 INFO L87 Difference]: Start difference. First operand 1467 states and 2001 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:12:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:28,957 INFO L93 Difference]: Finished difference Result 1681 states and 2135 transitions. [2021-10-21 19:12:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:12:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-10-21 19:12:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:28,970 INFO L225 Difference]: With dead ends: 1681 [2021-10-21 19:12:28,970 INFO L226 Difference]: Without dead ends: 1497 [2021-10-21 19:12:28,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 453.1ms TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:12:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-10-21 19:12:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-10-21 19:12:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1071 states have (on average 1.373482726423903) internal successors, (1471), 1209 states have internal predecessors, (1471), 107 states have call successors, (107), 107 states have call predecessors, (107), 189 states have return successors, (237), 63 states have call predecessors, (237), 106 states have call successors, (237) [2021-10-21 19:12:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1815 transitions. [2021-10-21 19:12:29,042 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1815 transitions. Word has length 30 [2021-10-21 19:12:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:29,043 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1815 transitions. [2021-10-21 19:12:29,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:12:29,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1815 transitions. [2021-10-21 19:12:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:12:29,045 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:29,046 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:29,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:29,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:29,258 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-10-21 19:12:29,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:29,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812411547] [2021-10-21 19:12:29,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:12:29,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:29,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:29,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-21 19:12:29,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:12:29,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:12:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:12:29,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:12:29,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:12:30,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:30,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812411547] [2021-10-21 19:12:30,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812411547] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:30,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:30,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-10-21 19:12:30,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44244086] [2021-10-21 19:12:30,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:12:30,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:12:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:12:30,142 INFO L87 Difference]: Start difference. First operand 1379 states and 1815 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:12:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:31,365 INFO L93 Difference]: Finished difference Result 2266 states and 3046 transitions. [2021-10-21 19:12:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:12:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-10-21 19:12:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:31,380 INFO L225 Difference]: With dead ends: 2266 [2021-10-21 19:12:31,380 INFO L226 Difference]: Without dead ends: 2170 [2021-10-21 19:12:31,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:12:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-10-21 19:12:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-10-21 19:12:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1543 states have (on average 1.404406999351912) internal successors, (2167), 1753 states have internal predecessors, (2167), 165 states have call successors, (165), 153 states have call predecessors, (165), 273 states have return successors, (421), 87 states have call predecessors, (421), 164 states have call successors, (421) [2021-10-21 19:12:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2753 transitions. [2021-10-21 19:12:31,475 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2753 transitions. Word has length 39 [2021-10-21 19:12:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:31,475 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2753 transitions. [2021-10-21 19:12:31,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:12:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2753 transitions. [2021-10-21 19:12:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:12:31,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:31,479 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:31,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:31,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:31,692 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:31,692 INFO L82 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-10-21 19:12:31,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:31,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273195282] [2021-10-21 19:12:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:31,694 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:31,695 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:31,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-21 19:12:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:32,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:12:32,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:12:32,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:32,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:32,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273195282] [2021-10-21 19:12:32,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273195282] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:32,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:32,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-10-21 19:12:32,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886416265] [2021-10-21 19:12:32,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:12:32,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:12:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:12:32,784 INFO L87 Difference]: Start difference. First operand 1993 states and 2753 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:12:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:34,263 INFO L93 Difference]: Finished difference Result 2261 states and 2959 transitions. [2021-10-21 19:12:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:12:34,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-10-21 19:12:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:34,276 INFO L225 Difference]: With dead ends: 2261 [2021-10-21 19:12:34,276 INFO L226 Difference]: Without dead ends: 2089 [2021-10-21 19:12:34,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:12:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-10-21 19:12:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-10-21 19:12:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1469 states have (on average 1.3839346494213751) internal successors, (2033), 1677 states have internal predecessors, (2033), 165 states have call successors, (165), 153 states have call predecessors, (165), 271 states have return successors, (393), 87 states have call predecessors, (393), 164 states have call successors, (393) [2021-10-21 19:12:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2591 transitions. [2021-10-21 19:12:34,354 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2591 transitions. Word has length 39 [2021-10-21 19:12:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2591 transitions. [2021-10-21 19:12:34,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:12:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2591 transitions. [2021-10-21 19:12:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:12:34,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:34,358 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:34,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:34,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:34,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-10-21 19:12:34,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:34,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695773383] [2021-10-21 19:12:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:34,572 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:34,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:34,573 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:34,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-21 19:12:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:12:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:12:35,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:37,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:37,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695773383] [2021-10-21 19:12:37,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695773383] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:37,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:37,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-10-21 19:12:37,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13320633] [2021-10-21 19:12:37,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:12:37,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:12:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:12:37,091 INFO L87 Difference]: Start difference. First operand 1917 states and 2591 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:12:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:41,798 INFO L93 Difference]: Finished difference Result 3752 states and 4898 transitions. [2021-10-21 19:12:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 19:12:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2021-10-21 19:12:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:41,828 INFO L225 Difference]: With dead ends: 3752 [2021-10-21 19:12:41,828 INFO L226 Difference]: Without dead ends: 3716 [2021-10-21 19:12:41,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2670.7ms TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-10-21 19:12:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-10-21 19:12:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-10-21 19:12:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2325 states have (on average 1.3320430107526882) internal successors, (3097), 2625 states have internal predecessors, (3097), 257 states have call successors, (257), 257 states have call predecessors, (257), 423 states have return successors, (665), 135 states have call predecessors, (665), 256 states have call successors, (665) [2021-10-21 19:12:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4019 transitions. [2021-10-21 19:12:41,982 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4019 transitions. Word has length 45 [2021-10-21 19:12:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:41,983 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4019 transitions. [2021-10-21 19:12:41,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:12:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4019 transitions. [2021-10-21 19:12:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:12:41,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:41,985 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:42,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:42,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:42,198 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-10-21 19:12:42,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:42,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765803321] [2021-10-21 19:12:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:42,200 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:42,201 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:42,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-21 19:12:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:42,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:12:42,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:12:42,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:43,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:43,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765803321] [2021-10-21 19:12:43,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765803321] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:43,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:43,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-10-21 19:12:43,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139256192] [2021-10-21 19:12:43,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:12:43,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:12:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:12:43,416 INFO L87 Difference]: Start difference. First operand 3017 states and 4019 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:12:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:45,118 INFO L93 Difference]: Finished difference Result 4090 states and 5250 transitions. [2021-10-21 19:12:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:12:45,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-10-21 19:12:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:45,141 INFO L225 Difference]: With dead ends: 4090 [2021-10-21 19:12:45,141 INFO L226 Difference]: Without dead ends: 3950 [2021-10-21 19:12:45,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 814.6ms TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:12:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-10-21 19:12:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-10-21 19:12:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2853 states have (on average 1.3126533473536628) internal successors, (3745), 3219 states have internal predecessors, (3745), 326 states have call successors, (326), 326 states have call predecessors, (326), 525 states have return successors, (779), 171 states have call predecessors, (779), 325 states have call successors, (779) [2021-10-21 19:12:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4850 transitions. [2021-10-21 19:12:45,262 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4850 transitions. Word has length 48 [2021-10-21 19:12:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:45,262 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4850 transitions. [2021-10-21 19:12:45,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:12:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4850 transitions. [2021-10-21 19:12:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:12:45,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:45,264 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:45,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:45,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:45,477 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-10-21 19:12:45,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:45,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746070275] [2021-10-21 19:12:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:45,478 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:45,479 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:45,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-21 19:12:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:12:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-21 19:12:46,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:46,945 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:46,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746070275] [2021-10-21 19:12:46,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746070275] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:46,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:46,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-10-21 19:12:46,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810037257] [2021-10-21 19:12:46,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:12:46,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:12:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:12:46,948 INFO L87 Difference]: Start difference. First operand 3716 states and 4850 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:12:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:49,162 INFO L93 Difference]: Finished difference Result 4249 states and 5455 transitions. [2021-10-21 19:12:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:12:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 59 [2021-10-21 19:12:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:49,194 INFO L225 Difference]: With dead ends: 4249 [2021-10-21 19:12:49,195 INFO L226 Difference]: Without dead ends: 4177 [2021-10-21 19:12:49,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1077.7ms TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 19:12:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-10-21 19:12:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-10-21 19:12:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3083 states have (on average 1.3100875770353553) internal successors, (4039), 3485 states have internal predecessors, (4039), 349 states have call successors, (349), 349 states have call predecessors, (349), 573 states have return successors, (833), 183 states have call predecessors, (833), 348 states have call successors, (833) [2021-10-21 19:12:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5221 transitions. [2021-10-21 19:12:49,318 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5221 transitions. Word has length 59 [2021-10-21 19:12:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:49,318 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5221 transitions. [2021-10-21 19:12:49,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:12:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5221 transitions. [2021-10-21 19:12:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-21 19:12:49,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:49,320 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:49,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:49,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:49,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:12:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:49,535 INFO L82 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-10-21 19:12:49,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:49,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708661408] [2021-10-21 19:12:49,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:12:49,536 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:49,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:49,537 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:49,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-21 19:12:50,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:12:50,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:12:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:12:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-21 19:12:50,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:12:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:12:53,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:12:53,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708661408] [2021-10-21 19:12:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708661408] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:12:53,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:53,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-10-21 19:12:53,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344018938] [2021-10-21 19:12:53,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 19:12:53,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:12:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 19:12:53,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:12:53,421 INFO L87 Difference]: Start difference. First operand 4017 states and 5221 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-21 19:12:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:59,924 INFO L93 Difference]: Finished difference Result 7214 states and 9438 transitions. [2021-10-21 19:12:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-21 19:12:59,935 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 70 [2021-10-21 19:12:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:59,969 INFO L225 Difference]: With dead ends: 7214 [2021-10-21 19:12:59,969 INFO L226 Difference]: Without dead ends: 7154 [2021-10-21 19:12:59,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4291.9ms TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 19:12:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-10-21 19:13:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-10-21 19:13:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3907 states have (on average 1.3112362426414128) internal successors, (5123), 4429 states have internal predecessors, (5123), 421 states have call successors, (421), 421 states have call predecessors, (421), 731 states have return successors, (1057), 221 states have call predecessors, (1057), 420 states have call successors, (1057) [2021-10-21 19:13:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6601 transitions. [2021-10-21 19:13:00,165 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6601 transitions. Word has length 70 [2021-10-21 19:13:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:00,166 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6601 transitions. [2021-10-21 19:13:00,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-21 19:13:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6601 transitions. [2021-10-21 19:13:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-21 19:13:00,168 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:00,168 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:00,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:13:00,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:13:00,382 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 19:13:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:00,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-10-21 19:13:00,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:13:00,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582118385] [2021-10-21 19:13:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:00,383 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:13:00,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:13:00,384 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:13:00,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-21 19:13:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:13:00,992 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:13:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:13:01,256 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 19:13:01,256 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:13:01,257 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:13:01,259 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-10-21 19:13:01,259 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-10-21 19:13:01,259 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-10-21 19:13:01,260 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-10-21 19:13:01,260 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-10-21 19:13:01,260 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-10-21 19:13:01,260 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-10-21 19:13:01,260 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-10-21 19:13:01,260 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-10-21 19:13:01,261 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-10-21 19:13:01,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-10-21 19:13:01,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-10-21 19:13:01,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-10-21 19:13:01,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-10-21 19:13:01,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:13:01,303 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:13:01,303 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:13:01,303 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:13:01,303 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:13:01,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:13:01,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:13:01,516 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:13:01,566 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 19:13:01,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:13:01 BoogieIcfgContainer [2021-10-21 19:13:01,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:13:01,617 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:13:01,617 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:13:01,617 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:13:01,618 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:12:15" (3/4) ... [2021-10-21 19:13:01,620 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:13:01,620 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:13:01,622 INFO L168 Benchmark]: Toolchain (without parser) took 47390.10 ms. Allocated memory was 56.6 MB in the beginning and 182.5 MB in the end (delta: 125.8 MB). Free memory was 33.4 MB in the beginning and 87.0 MB in the end (delta: -53.6 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:13:01,622 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 56.6 MB. Free memory was 36.9 MB in the beginning and 36.8 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:13:01,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 487.38 ms. Allocated memory is still 56.6 MB. Free memory was 33.2 MB in the beginning and 31.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:13:01,623 INFO L168 Benchmark]: Boogie Preprocessor took 72.91 ms. Allocated memory is still 56.6 MB. Free memory was 31.1 MB in the beginning and 28.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:13:01,624 INFO L168 Benchmark]: RCFGBuilder took 1021.05 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 27.8 MB in the beginning and 42.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:13:01,624 INFO L168 Benchmark]: TraceAbstraction took 45798.43 ms. Allocated memory was 71.3 MB in the beginning and 182.5 MB in the end (delta: 111.1 MB). Free memory was 42.4 MB in the beginning and 87.0 MB in the end (delta: -44.6 MB). Peak memory consumption was 126.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:13:01,624 INFO L168 Benchmark]: Witness Printer took 3.90 ms. Allocated memory is still 182.5 MB. Free memory is still 87.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:13:01,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 56.6 MB. Free memory was 36.9 MB in the beginning and 36.8 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 487.38 ms. Allocated memory is still 56.6 MB. Free memory was 33.2 MB in the beginning and 31.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.91 ms. Allocated memory is still 56.6 MB. Free memory was 31.1 MB in the beginning and 28.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1021.05 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 27.8 MB in the beginning and 42.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45798.43 ms. Allocated memory was 71.3 MB in the beginning and 182.5 MB in the end (delta: 111.1 MB). Free memory was 42.4 MB in the beginning and 87.0 MB in the end (delta: -44.6 MB). Peak memory consumption was 126.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.90 ms. Allocated memory is still 182.5 MB. Free memory is still 87.0 MB. There was no memory consumed. Max. memory is 16.1 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=18, \old(pc4)=28, \old(res4)=22, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc1++=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 45630.8ms, OverallIterations: 19, TraceHistogramMax: 6, EmptinessCheckTime: 47.9ms, AutomataDifference: 22521.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2412 SDtfs, 14226 SDslu, 3700 SDs, 0 SdLazy, 10230 SolverSat, 3710 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10877.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1242 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 11380.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5071occurred in iteration=18, InterpolantAutomatonStates: 335, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1243.1ms AutomataMinimizationTime, 18 MinimizatonAttempts, 4146 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 367.7ms SsaConstructionTime, 1547.0ms SatisfiabilityAnalysisTime, 11625.4ms InterpolantComputationTime, 567 NumberOfCodeBlocks, 567 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 956 ConstructedInterpolants, 0 QuantifiedInterpolants, 5575 SizeOfPredicates, 63 NumberOfNonLiveVariables, 4143 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 36 InterpolantComputations, 14 PerfectInterpolantSequences, 291/834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 19:13:01,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdde3429-c96a-406b-8238-5df2727bd4b8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...