./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3 --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 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3 --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 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:26:55,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:26:55,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:26:55,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:26:55,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:26:55,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:26:55,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:26:55,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:26:55,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:26:55,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:26:55,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:26:55,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:26:55,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:26:55,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:26:55,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:26:55,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:26:55,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:26:55,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:26:55,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:26:55,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:26:55,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:26:55,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:26:55,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:26:55,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:26:55,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:26:55,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:26:55,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:26:55,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:26:55,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:26:55,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:26:55,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:26:55,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:26:55,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:26:55,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:26:55,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:26:55,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:26:55,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:26:55,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:26:55,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:26:55,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:26:55,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:26:55,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 19:26:55,250 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:26:55,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:26:55,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:26:55,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:26:55,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:26:55,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:26:55,252 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:26:55,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:26:55,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:26:55,253 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:26:55,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:26:55,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:26:55,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:26:55,254 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:26:55,254 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:26:55,254 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:26:55,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:26:55,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:26:55,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:26:55,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:26:55,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:26:55,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:26:55,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:26:55,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:26:55,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:26:55,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:26:55,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:26:55,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:26:55,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:26:55,257 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_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 [2021-10-15 19:26:55,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:26:55,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:26:55,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:26:55,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:26:55,619 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:26:55,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-15 19:26:55,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/12b5f1faf/08c1f7bc88bc472b8a8e7945fd1898e5/FLAG9e34ff8c9 [2021-10-15 19:26:56,345 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:26:56,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-15 19:26:56,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/12b5f1faf/08c1f7bc88bc472b8a8e7945fd1898e5/FLAG9e34ff8c9 [2021-10-15 19:26:56,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/12b5f1faf/08c1f7bc88bc472b8a8e7945fd1898e5 [2021-10-15 19:26:56,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:26:56,633 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:26:56,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:26:56,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:26:56,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:26:56,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:26:56" (1/1) ... [2021-10-15 19:26:56,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea03a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:56, skipping insertion in model container [2021-10-15 19:26:56,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:26:56" (1/1) ... [2021-10-15 19:26:56,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:26:56,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:26:57,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:26:57,129 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:26:57,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:26:57,246 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:26:57,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57 WrapperNode [2021-10-15 19:26:57,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:26:57,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:26:57,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:26:57,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:26:57,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:26:57,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:26:57,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:26:57,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:26:57,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (1/1) ... [2021-10-15 19:26:57,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:26:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:26:57,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:26:57,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:26:57,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:26:57,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:26:57,464 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 19:26:57,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:26:57,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:26:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 19:26:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 19:26:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 19:26:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-10-15 19:26:57,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:26:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:26:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 19:26:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 19:26:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 19:26:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 19:26:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:26:57,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 19:26:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:26:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:26:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:26:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:26:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:26:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:26:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:26:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:26:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:26:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:26:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:26:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:26:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:26:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:26:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:26:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:26:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:26:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:26:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:26:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:26:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:26:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:26:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:26:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:26:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:26:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:26:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:26:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:26:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:26:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:26:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:26:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:26:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:26:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:26:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:26:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:26:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:26:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:26:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:26:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:26:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:26:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:26:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:26:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:26:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:26:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:26:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:26:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:26:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:26:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:26:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:26:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:26:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:26:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:26:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:26:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:26:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:26:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:26:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:26:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:26:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:26:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:26:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:26:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:26:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:26:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:26:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:26:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:26:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:26:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:26:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:26:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:26:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:26:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:26:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:26:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:26:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:26:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:26:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-10-15 19:26:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:26:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:26:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:26:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:26:57,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 19:26:57,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:26:57,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:26:57,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:26:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:26:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:26:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:26:58,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:26:58,179 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-15 19:26:58,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:26:58 BoogieIcfgContainer [2021-10-15 19:26:58,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:26:58,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:26:58,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:26:58,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:26:58,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:26:56" (1/3) ... [2021-10-15 19:26:58,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b70901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:26:58, skipping insertion in model container [2021-10-15 19:26:58,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:26:57" (2/3) ... [2021-10-15 19:26:58,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b70901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:26:58, skipping insertion in model container [2021-10-15 19:26:58,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:26:58" (3/3) ... [2021-10-15 19:26:58,196 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2021-10-15 19:26:58,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:26:58,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-10-15 19:26:58,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:26:58,264 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, mConcurrency=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 [2021-10-15 19:26:58,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-10-15 19:26:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 49 states have (on average 2.020408163265306) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:26:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-15 19:26:58,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:26:58,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:58,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:26:58,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash 159106718, now seen corresponding path program 1 times [2021-10-15 19:26:58,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:58,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667303591] [2021-10-15 19:26:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:58,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:26:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:26:58,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:58,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667303591] [2021-10-15 19:26:58,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667303591] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:58,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:26:58,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:26:58,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795221385] [2021-10-15 19:26:58,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:26:58,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:26:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:26:58,747 INFO L87 Difference]: Start difference. First operand has 99 states, 49 states have (on average 2.020408163265306) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 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) [2021-10-15 19:26:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:26:59,177 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-10-15 19:26:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:26:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 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 9 [2021-10-15 19:26:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:26:59,194 INFO L225 Difference]: With dead ends: 95 [2021-10-15 19:26:59,194 INFO L226 Difference]: Without dead ends: 92 [2021-10-15 19:26:59,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:26:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-15 19:26:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-10-15 19:26:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:26:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-10-15 19:26:59,258 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 9 [2021-10-15 19:26:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:26:59,259 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-10-15 19:26:59,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 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) [2021-10-15 19:26:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-10-15 19:26:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-15 19:26:59,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:26:59,261 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:59,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:26:59,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:26:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash 159106719, now seen corresponding path program 1 times [2021-10-15 19:26:59,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:59,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95981745] [2021-10-15 19:26:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:59,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:59,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:26:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:26:59,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:59,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95981745] [2021-10-15 19:26:59,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95981745] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:59,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:26:59,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:26:59,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307125005] [2021-10-15 19:26:59,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:26:59,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:26:59,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:26:59,484 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 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) [2021-10-15 19:26:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:26:59,904 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-10-15 19:26:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:26:59,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 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 9 [2021-10-15 19:26:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:26:59,909 INFO L225 Difference]: With dead ends: 121 [2021-10-15 19:26:59,909 INFO L226 Difference]: Without dead ends: 121 [2021-10-15 19:26:59,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:26:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-15 19:26:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2021-10-15 19:26:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.7966101694915255) internal successors, (106), 94 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:26:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2021-10-15 19:26:59,923 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 9 [2021-10-15 19:26:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:26:59,924 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2021-10-15 19:26:59,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 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) [2021-10-15 19:26:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2021-10-15 19:26:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:26:59,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:26:59,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:59,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:26:59,926 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:26:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 637341052, now seen corresponding path program 1 times [2021-10-15 19:26:59,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:59,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743732528] [2021-10-15 19:26:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:59,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:59,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:26:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:00,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:00,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743732528] [2021-10-15 19:27:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743732528] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:00,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:00,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:27:00,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576673545] [2021-10-15 19:27:00,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:27:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:27:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:00,007 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-15 19:27:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:00,182 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2021-10-15 19:27:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:27:00,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2021-10-15 19:27:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:00,195 INFO L225 Difference]: With dead ends: 96 [2021-10-15 19:27:00,195 INFO L226 Difference]: Without dead ends: 96 [2021-10-15 19:27:00,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-15 19:27:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-15 19:27:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 90 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-10-15 19:27:00,215 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 10 [2021-10-15 19:27:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-10-15 19:27:00,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-15 19:27:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-10-15 19:27:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:27:00,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:00,217 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:00,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:27:00,217 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:00,219 INFO L82 PathProgramCache]: Analyzing trace with hash 637341053, now seen corresponding path program 1 times [2021-10-15 19:27:00,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:00,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410639167] [2021-10-15 19:27:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:00,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:00,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:00,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:00,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410639167] [2021-10-15 19:27:00,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410639167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:00,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:00,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:27:00,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714503465] [2021-10-15 19:27:00,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:27:00,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:27:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:00,329 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-15 19:27:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:00,486 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-10-15 19:27:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:27:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 10 [2021-10-15 19:27:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:00,489 INFO L225 Difference]: With dead ends: 92 [2021-10-15 19:27:00,489 INFO L226 Difference]: Without dead ends: 92 [2021-10-15 19:27:00,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-15 19:27:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-15 19:27:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-10-15 19:27:00,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 10 [2021-10-15 19:27:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:00,508 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-10-15 19:27:00,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-15 19:27:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-10-15 19:27:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:27:00,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:00,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:00,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:27:00,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash 403096809, now seen corresponding path program 1 times [2021-10-15 19:27:00,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:00,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019088100] [2021-10-15 19:27:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:00,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:00,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:00,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:00,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019088100] [2021-10-15 19:27:00,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019088100] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:00,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:00,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 19:27:00,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182605776] [2021-10-15 19:27:00,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:27:00,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:27:00,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:27:00,726 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 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) [2021-10-15 19:27:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:01,102 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-10-15 19:27:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:27:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 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 15 [2021-10-15 19:27:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:01,105 INFO L225 Difference]: With dead ends: 103 [2021-10-15 19:27:01,105 INFO L226 Difference]: Without dead ends: 103 [2021-10-15 19:27:01,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:27:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-15 19:27:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-10-15 19:27:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 92 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-10-15 19:27:01,115 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 15 [2021-10-15 19:27:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:01,116 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-10-15 19:27:01,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 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) [2021-10-15 19:27:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-10-15 19:27:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-15 19:27:01,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:01,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:01,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:27:01,118 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash -388622655, now seen corresponding path program 1 times [2021-10-15 19:27:01,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:01,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477603957] [2021-10-15 19:27:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:01,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:01,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477603957] [2021-10-15 19:27:01,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477603957] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:01,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:01,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:27:01,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922364033] [2021-10-15 19:27:01,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:27:01,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:01,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:27:01,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:27:01,271 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 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) [2021-10-15 19:27:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:01,535 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-10-15 19:27:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:27:01,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 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 16 [2021-10-15 19:27:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:01,537 INFO L225 Difference]: With dead ends: 98 [2021-10-15 19:27:01,537 INFO L226 Difference]: Without dead ends: 98 [2021-10-15 19:27:01,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:27:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-15 19:27:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-10-15 19:27:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.5806451612903225) internal successors, (98), 88 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-10-15 19:27:01,555 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 16 [2021-10-15 19:27:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:01,556 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-10-15 19:27:01,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 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) [2021-10-15 19:27:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-10-15 19:27:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 19:27:01,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:01,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:01,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:27:01,558 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash 482359371, now seen corresponding path program 1 times [2021-10-15 19:27:01,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:01,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181747389] [2021-10-15 19:27:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:01,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:01,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:01,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:01,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:01,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181747389] [2021-10-15 19:27:01,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181747389] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:01,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:01,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:27:01,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281351504] [2021-10-15 19:27:01,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:27:01,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:27:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:27:01,799 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:02,196 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-15 19:27:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:27:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-10-15 19:27:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:02,199 INFO L225 Difference]: With dead ends: 111 [2021-10-15 19:27:02,199 INFO L226 Difference]: Without dead ends: 111 [2021-10-15 19:27:02,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:27:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-15 19:27:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2021-10-15 19:27:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.564516129032258) internal successors, (97), 88 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-10-15 19:27:02,205 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 25 [2021-10-15 19:27:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:02,206 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-10-15 19:27:02,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-10-15 19:27:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 19:27:02,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:02,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:02,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:27:02,209 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash 482359372, now seen corresponding path program 1 times [2021-10-15 19:27:02,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:02,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620655122] [2021-10-15 19:27:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:02,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:02,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:02,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:02,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:02,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620655122] [2021-10-15 19:27:02,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620655122] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:02,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:02,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:27:02,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86133290] [2021-10-15 19:27:02,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:27:02,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:27:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:27:02,452 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:02,849 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-10-15 19:27:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:27:02,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-10-15 19:27:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:02,851 INFO L225 Difference]: With dead ends: 106 [2021-10-15 19:27:02,851 INFO L226 Difference]: Without dead ends: 106 [2021-10-15 19:27:02,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:27:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-15 19:27:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-15 19:27:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.532258064516129) internal successors, (95), 87 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-10-15 19:27:02,857 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 25 [2021-10-15 19:27:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:02,857 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-10-15 19:27:02,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-10-15 19:27:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 19:27:02,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:02,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:02,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:27:02,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:02,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:02,860 INFO L82 PathProgramCache]: Analyzing trace with hash 482345437, now seen corresponding path program 1 times [2021-10-15 19:27:02,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:02,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611577954] [2021-10-15 19:27:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:02,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:02,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:02,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:02,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611577954] [2021-10-15 19:27:02,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611577954] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:02,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:02,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:27:02,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831545106] [2021-10-15 19:27:02,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:27:02,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:02,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:27:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:27:02,938 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:03,100 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-10-15 19:27:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:27:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-10-15 19:27:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:03,102 INFO L225 Difference]: With dead ends: 76 [2021-10-15 19:27:03,102 INFO L226 Difference]: Without dead ends: 76 [2021-10-15 19:27:03,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:27:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-15 19:27:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-15 19:27:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-10-15 19:27:03,106 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 25 [2021-10-15 19:27:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:03,107 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-10-15 19:27:03,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-10-15 19:27:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 19:27:03,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:03,109 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:03,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:27:03,109 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr29ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 483581567, now seen corresponding path program 1 times [2021-10-15 19:27:03,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:03,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856771419] [2021-10-15 19:27:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:03,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:03,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:03,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856771419] [2021-10-15 19:27:03,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856771419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:03,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:03,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:27:03,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986985100] [2021-10-15 19:27:03,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:27:03,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:03,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:27:03,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:27:03,199 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:03,373 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-10-15 19:27:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:27:03,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-10-15 19:27:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:03,375 INFO L225 Difference]: With dead ends: 72 [2021-10-15 19:27:03,375 INFO L226 Difference]: Without dead ends: 72 [2021-10-15 19:27:03,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:27:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-15 19:27:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-10-15 19:27:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 64 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-10-15 19:27:03,379 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 25 [2021-10-15 19:27:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:03,379 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-10-15 19:27:03,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-10-15 19:27:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-15 19:27:03,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:03,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:03,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:27:03,381 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:03,382 INFO L82 PathProgramCache]: Analyzing trace with hash -992523117, now seen corresponding path program 1 times [2021-10-15 19:27:03,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:03,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235294266] [2021-10-15 19:27:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:03,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:03,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:03,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235294266] [2021-10-15 19:27:03,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235294266] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:03,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:03,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:27:03,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116670558] [2021-10-15 19:27:03,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:27:03,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:27:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:27:03,525 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:03,766 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-10-15 19:27:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:27:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-10-15 19:27:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:03,767 INFO L225 Difference]: With dead ends: 70 [2021-10-15 19:27:03,768 INFO L226 Difference]: Without dead ends: 70 [2021-10-15 19:27:03,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:27:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-15 19:27:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-15 19:27:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.375) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-10-15 19:27:03,771 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 28 [2021-10-15 19:27:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:03,772 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-10-15 19:27:03,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-10-15 19:27:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-15 19:27:03,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:03,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:03,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:27:03,774 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:03,775 INFO L82 PathProgramCache]: Analyzing trace with hash -703445460, now seen corresponding path program 1 times [2021-10-15 19:27:03,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:03,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955526680] [2021-10-15 19:27:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:03,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:03,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:03,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955526680] [2021-10-15 19:27:03,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955526680] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:03,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:03,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:27:03,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299706417] [2021-10-15 19:27:03,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:27:03,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:27:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:27:03,907 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:04,191 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-10-15 19:27:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:27:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-10-15 19:27:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:04,192 INFO L225 Difference]: With dead ends: 69 [2021-10-15 19:27:04,193 INFO L226 Difference]: Without dead ends: 69 [2021-10-15 19:27:04,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:27:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-15 19:27:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-15 19:27:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 62 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-10-15 19:27:04,196 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 29 [2021-10-15 19:27:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:04,197 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-10-15 19:27:04,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-10-15 19:27:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 19:27:04,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:04,198 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] [2021-10-15 19:27:04,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:27:04,198 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash 413622409, now seen corresponding path program 1 times [2021-10-15 19:27:04,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:04,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800565616] [2021-10-15 19:27:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:04,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:04,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:04,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:04,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800565616] [2021-10-15 19:27:04,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800565616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:27:04,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485963561] [2021-10-15 19:27:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:04,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:27:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:27:04,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:27:04,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:27:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-15 19:27:04,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:04,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2021-10-15 19:27:05,011 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-10-15 19:27:05,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-10-15 19:27:05,147 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:27:05,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-10-15 19:27:05,360 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:27:05,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-15 19:27:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485963561] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:27:05,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:27:05,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-15 19:27:05,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891178956] [2021-10-15 19:27:05,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 19:27:05,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 19:27:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-15 19:27:05,431 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:27:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:06,309 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-10-15 19:27:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:27:06,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-10-15 19:27:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:06,311 INFO L225 Difference]: With dead ends: 75 [2021-10-15 19:27:06,311 INFO L226 Difference]: Without dead ends: 75 [2021-10-15 19:27:06,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 702.1ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-10-15 19:27:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-15 19:27:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-10-15 19:27:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 66 states have internal predecessors, (68), 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) [2021-10-15 19:27:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-10-15 19:27:06,315 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 30 [2021-10-15 19:27:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:06,315 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-10-15 19:27:06,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:27:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-10-15 19:27:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 19:27:06,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:06,316 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] [2021-10-15 19:27:06,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 19:27:06,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:27:06,517 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash 413622410, now seen corresponding path program 1 times [2021-10-15 19:27:06,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:06,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192066426] [2021-10-15 19:27:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:06,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:06,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:06,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:06,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:06,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192066426] [2021-10-15 19:27:06,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192066426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:27:06,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334979650] [2021-10-15 19:27:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:06,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:27:06,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:27:06,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:27:06,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:27:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-15 19:27:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:07,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-15 19:27:07,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-15 19:27:07,379 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 19:27:07,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 19:27:07,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-15 19:27:07,525 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:27:07,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-10-15 19:27:07,539 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:27:07,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-10-15 19:27:08,347 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:27:08,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 50 [2021-10-15 19:27:08,354 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:27:08,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-10-15 19:27:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:08,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334979650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:27:08,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:27:08,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-15 19:27:08,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409724141] [2021-10-15 19:27:08,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 19:27:08,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 19:27:08,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-15 19:27:08,397 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:27:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:09,385 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-10-15 19:27:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:27:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-10-15 19:27:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:09,386 INFO L225 Difference]: With dead ends: 74 [2021-10-15 19:27:09,386 INFO L226 Difference]: Without dead ends: 74 [2021-10-15 19:27:09,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1418.3ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-10-15 19:27:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-15 19:27:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-10-15 19:27:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 65 states have internal predecessors, (67), 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) [2021-10-15 19:27:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-10-15 19:27:09,390 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 30 [2021-10-15 19:27:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:09,390 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-10-15 19:27:09,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:27:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-10-15 19:27:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 19:27:09,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:09,391 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:09,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:09,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:27:09,608 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash -331972683, now seen corresponding path program 1 times [2021-10-15 19:27:09,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:09,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704285835] [2021-10-15 19:27:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:09,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:09,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:09,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:09,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704285835] [2021-10-15 19:27:09,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704285835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:09,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:27:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20035452] [2021-10-15 19:27:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:27:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:27:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:27:09,713 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:09,894 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-10-15 19:27:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:27:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-10-15 19:27:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:09,895 INFO L225 Difference]: With dead ends: 71 [2021-10-15 19:27:09,896 INFO L226 Difference]: Without dead ends: 71 [2021-10-15 19:27:09,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:27:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-15 19:27:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-15 19:27:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 64 states have internal predecessors, (66), 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) [2021-10-15 19:27:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-10-15 19:27:09,902 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 30 [2021-10-15 19:27:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:09,903 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-10-15 19:27:09,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-10-15 19:27:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 19:27:09,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:09,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:09,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:27:09,905 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1701218481, now seen corresponding path program 1 times [2021-10-15 19:27:09,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:09,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011377620] [2021-10-15 19:27:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:09,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:09,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:10,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:10,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:10,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011377620] [2021-10-15 19:27:10,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011377620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:10,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:10,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:27:10,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475085941] [2021-10-15 19:27:10,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:27:10,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:10,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:27:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:27:10,107 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:10,332 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-10-15 19:27:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:27:10,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-10-15 19:27:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:10,333 INFO L225 Difference]: With dead ends: 70 [2021-10-15 19:27:10,333 INFO L226 Difference]: Without dead ends: 70 [2021-10-15 19:27:10,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:27:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-15 19:27:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-15 19:27:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.25) internal successors, (65), 63 states have internal predecessors, (65), 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) [2021-10-15 19:27:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-10-15 19:27:10,337 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 31 [2021-10-15 19:27:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:10,337 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-10-15 19:27:10,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-10-15 19:27:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 19:27:10,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:10,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:10,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:27:10,338 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:10,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1701218480, now seen corresponding path program 1 times [2021-10-15 19:27:10,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:10,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246302171] [2021-10-15 19:27:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:10,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:10,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:27:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:10,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-15 19:27:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:10,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:10,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246302171] [2021-10-15 19:27:10,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246302171] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:10,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:10,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:27:10,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15289061] [2021-10-15 19:27:10,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:27:10,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:27:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:27:10,440 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:10,594 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-10-15 19:27:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:27:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-10-15 19:27:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:10,595 INFO L225 Difference]: With dead ends: 66 [2021-10-15 19:27:10,596 INFO L226 Difference]: Without dead ends: 66 [2021-10-15 19:27:10,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:27:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-15 19:27:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-15 19:27:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 59 states have internal predecessors, (61), 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) [2021-10-15 19:27:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-15 19:27:10,603 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 31 [2021-10-15 19:27:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:10,604 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-15 19:27:10,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-15 19:27:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 19:27:10,607 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:10,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:10,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:27:10,608 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr29ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 930259001, now seen corresponding path program 1 times [2021-10-15 19:27:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:10,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768151788] [2021-10-15 19:27:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:10,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:27:10,669 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:27:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:27:10,741 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:27:10,742 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:27:10,744 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr29ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:27:10,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:27:10,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:27:10,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:27:10,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:27:10,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-15 19:27:10,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-15 19:27:10,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-15 19:27:10,748 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-15 19:27:10,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-15 19:27:10,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-15 19:27:10,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,750 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,750 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-15 19:27:10,750 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-15 19:27:10,750 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-15 19:27:10,750 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-15 19:27:10,751 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-15 19:27:10,751 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-15 19:27:10,751 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-15 19:27:10,752 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-15 19:27:10,752 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,753 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,753 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:27:10,753 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-15 19:27:10,754 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-15 19:27:10,754 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-10-15 19:27:10,754 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-10-15 19:27:10,754 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-10-15 19:27:10,755 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-10-15 19:27:10,755 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-10-15 19:27:10,755 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-10-15 19:27:10,755 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-10-15 19:27:10,755 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-10-15 19:27:10,756 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-10-15 19:27:10,756 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-10-15 19:27:10,756 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-10-15 19:27:10,756 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-10-15 19:27:10,756 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-10-15 19:27:10,757 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-10-15 19:27:10,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 19:27:10,768 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:27:10,803 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-15 19:27:10,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:27:10 BoogieIcfgContainer [2021-10-15 19:27:10,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:27:10,843 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:27:10,843 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:27:10,843 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:27:10,844 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:26:58" (3/4) ... [2021-10-15 19:27:10,851 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:27:10,851 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:27:10,853 INFO L168 Benchmark]: Toolchain (without parser) took 14219.31 ms. Allocated memory was 102.8 MB in the beginning and 127.9 MB in the end (delta: 25.2 MB). Free memory was 61.9 MB in the beginning and 74.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:10,853 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 102.8 MB. Free memory is still 79.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:27:10,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 599.15 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 69.3 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:10,854 INFO L168 Benchmark]: Boogie Preprocessor took 120.31 ms. Allocated memory is still 102.8 MB. Free memory was 69.3 MB in the beginning and 66.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:10,855 INFO L168 Benchmark]: RCFGBuilder took 817.33 ms. Allocated memory is still 102.8 MB. Free memory was 66.3 MB in the beginning and 42.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:10,855 INFO L168 Benchmark]: TraceAbstraction took 12654.77 ms. Allocated memory was 102.8 MB in the beginning and 127.9 MB in the end (delta: 25.2 MB). Free memory was 42.0 MB in the beginning and 74.2 MB in the end (delta: -32.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:27:10,856 INFO L168 Benchmark]: Witness Printer took 8.72 ms. Allocated memory is still 127.9 MB. Free memory is still 74.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:27:10,860 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 102.8 MB. Free memory is still 79.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 599.15 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 69.3 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 120.31 ms. Allocated memory is still 102.8 MB. Free memory was 69.3 MB in the beginning and 66.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 817.33 ms. Allocated memory is still 102.8 MB. Free memory was 66.3 MB in the beginning and 42.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12654.77 ms. Allocated memory was 102.8 MB in the beginning and 127.9 MB in the end (delta: 25.2 MB). Free memory was 42.0 MB in the beginning and 74.2 MB in the end (delta: -32.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 8.72 ms. Allocated memory is still 127.9 MB. Free memory is still 74.2 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.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: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; VAL [\old(c)=51, c=0] [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [\old(c)=0, c=0, length=0, list={3:0}] [L544] CALL append(&list) VAL [\old(c)=0, c=0, plist={3:0}] [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={3:0}, plist={3:0}] [L533] item->next = *plist VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={3:0}, plist={3:0}] [L534] EXPR item->next VAL [\old(c)=0, c=1, item={1:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L537] *plist = item VAL [\old(c)=0, c=1, item={1:0}, plist={3:0}, plist={3:0}] [L544] RET append(&list) VAL [\old(c)=0, c=1, length=0, list={3:0}] [L545] length++ VAL [\old(c)=0, c=1, length=1, list={3:0}] [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [\old(c)=0, c=1, length=1, list={3:0}] [L548] COND FALSE !(length < 0) VAL [\old(c)=0, c=1, length=1, list={3:0}] [L551] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}] [L551] EXPR list->next VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, list->next={0:0}] [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, next={0:0}] [L552] free(list) [L553] list = next VAL [\old(c)=0, c=1, length=1, list={3:0}, next={0:0}] [L554] length-- VAL [\old(c)=0, c=1, length=0, list={3:0}, next={0:0}] [L556] COND FALSE !(length > 0) VAL [\old(c)=0, c=1, length=0, list={3:0}, next={0:0}] [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [\old(c)=0, \result=0, c=1, length=0, next={0:0}] - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 117 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 12511.0ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 50.3ms, AutomataDifference: 6024.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 911 SDtfs, 809 SDslu, 2714 SDs, 0 SdLazy, 3967 SolverSat, 165 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3180.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 264 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3600.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=2, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.9ms AutomataMinimizationTime, 17 MinimizatonAttempts, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 101.5ms SsaConstructionTime, 452.9ms SatisfiabilityAnalysisTime, 4515.0ms InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 419 ConstructedInterpolants, 12 QuantifiedInterpolants, 3907 SizeOfPredicates, 32 NumberOfNonLiveVariables, 504 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 6/28 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 [2021-10-15 19:27:10,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/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-5709675 [2021-10-15 19:27:13,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:27:13,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:27:13,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:27:13,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:27:13,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:27:13,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:27:13,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:27:13,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:27:13,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:27:13,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:27:13,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:27:13,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:27:13,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:27:13,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:27:13,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:27:13,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:27:13,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:27:13,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:27:13,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:27:13,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:27:13,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:27:13,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:27:13,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:27:13,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:27:13,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:27:13,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:27:13,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:27:13,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:27:13,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:27:13,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:27:13,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:27:13,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:27:13,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:27:13,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:27:13,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:27:13,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:27:13,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:27:13,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:27:13,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:27:13,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:27:13,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-15 19:27:13,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:27:13,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:27:13,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:27:13,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:27:13,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:27:13,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:27:13,756 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:27:13,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:27:13,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:27:13,757 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:27:13,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:27:13,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:27:13,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:27:13,759 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:27:13,759 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:27:13,760 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 19:27:13,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:27:13,760 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:27:13,760 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:27:13,761 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:27:13,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:27:13,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:27:13,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:27:13,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:27:13,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:27:13,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:27:13,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:27:13,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:27:13,763 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:27:13,764 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:27:13,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:27:13,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:27:13,765 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_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 [2021-10-15 19:27:14,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:27:14,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:27:14,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:27:14,255 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:27:14,256 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:27:14,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-15 19:27:14,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/4b4e64fa2/081c5b30bb9a46be98396f8e1d82bba8/FLAG89900cee9 [2021-10-15 19:27:15,074 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:27:15,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-10-15 19:27:15,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/4b4e64fa2/081c5b30bb9a46be98396f8e1d82bba8/FLAG89900cee9 [2021-10-15 19:27:15,334 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/data/4b4e64fa2/081c5b30bb9a46be98396f8e1d82bba8 [2021-10-15 19:27:15,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:27:15,342 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:27:15,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:27:15,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:27:15,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:27:15,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:27:15" (1/1) ... [2021-10-15 19:27:15,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f0d863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:15, skipping insertion in model container [2021-10-15 19:27:15,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:27:15" (1/1) ... [2021-10-15 19:27:15,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:27:15,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:27:15,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:27:15,990 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:27:16,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:27:16,154 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:27:16,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16 WrapperNode [2021-10-15 19:27:16,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:27:16,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:27:16,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:27:16,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:27:16,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:27:16,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:27:16,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:27:16,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:27:16,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (1/1) ... [2021-10-15 19:27:16,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:27:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:27:16,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:27:16,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:27:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:27:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:27:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-15 19:27:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 19:27:16,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:27:16,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:27:16,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 19:27:16,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 19:27:16,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 19:27:16,367 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-10-15 19:27:16,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:27:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:27:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 19:27:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 19:27:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 19:27:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 19:27:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:27:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:27:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:27:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:27:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:27:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:27:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:27:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:27:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:27:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:27:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:27:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:27:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:27:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:27:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:27:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:27:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:27:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:27:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:27:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 19:27:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 19:27:16,375 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 19:27:16,375 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:27:16,375 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:27:16,375 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:27:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:27:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:27:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:27:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:27:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:27:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:27:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:27:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:27:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:27:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:27:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:27:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:27:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:27:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:27:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:27:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:27:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:27:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:27:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:27:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:27:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:27:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:27:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:27:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:27:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:27:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:27:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:27:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:27:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:27:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:27:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:27:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:27:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:27:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:27:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:27:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:27:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:27:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:27:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:27:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:27:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:27:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:27:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:27:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:27:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:27:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:27:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:27:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:27:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:27:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:27:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:27:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:27:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:27:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:27:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:27:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:27:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:27:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:27:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:27:16,391 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:27:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:27:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:27:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:27:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:27:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:27:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:27:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:27:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:27:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:27:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:27:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:27:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:27:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:27:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:27:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:27:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:27:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:27:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:27:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:27:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:27:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:27:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:27:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:27:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-10-15 19:27:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:27:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:27:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:27:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:27:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 19:27:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:27:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:27:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:27:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:27:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-15 19:27:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-15 19:27:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-15 19:27:17,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:27:17,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-15 19:27:17,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:27:17 BoogieIcfgContainer [2021-10-15 19:27:17,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:27:17,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:27:17,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:27:17,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:27:17,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:27:15" (1/3) ... [2021-10-15 19:27:17,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be46b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:27:17, skipping insertion in model container [2021-10-15 19:27:17,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:16" (2/3) ... [2021-10-15 19:27:17,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be46b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:27:17, skipping insertion in model container [2021-10-15 19:27:17,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:27:17" (3/3) ... [2021-10-15 19:27:17,542 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2021-10-15 19:27:17,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:27:17,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-10-15 19:27:17,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:27:17,639 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, mConcurrency=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 [2021-10-15 19:27:17,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-10-15 19:27:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 91 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-15 19:27:17,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:17,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:17,701 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash -784082766, now seen corresponding path program 1 times [2021-10-15 19:27:17,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:17,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517878544] [2021-10-15 19:27:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:17,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:17,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:17,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:17,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:27:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:18,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:27:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:18,144 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 [2021-10-15 19:27:18,292 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-15 19:27:18,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-10-15 19:27:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:18,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:18,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:18,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517878544] [2021-10-15 19:27:18,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517878544] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:18,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:18,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-15 19:27:18,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335223007] [2021-10-15 19:27:18,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:27:18,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:27:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:27:18,601 INFO L87 Difference]: Start difference. First operand has 98 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 91 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-10-15 19:27:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:19,162 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-10-15 19:27:19,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:27:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 9 [2021-10-15 19:27:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:19,181 INFO L225 Difference]: With dead ends: 94 [2021-10-15 19:27:19,182 INFO L226 Difference]: Without dead ends: 91 [2021-10-15 19:27:19,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:27:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-15 19:27:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-10-15 19:27:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 84 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-10-15 19:27:19,258 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 9 [2021-10-15 19:27:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:19,259 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-10-15 19:27:19,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-10-15 19:27:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-10-15 19:27:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-15 19:27:19,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:19,261 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:19,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:19,476 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash -784082765, now seen corresponding path program 1 times [2021-10-15 19:27:19,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:19,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856302021] [2021-10-15 19:27:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:19,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:19,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:19,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:27:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:27:19,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:19,742 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 [2021-10-15 19:27:19,751 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 [2021-10-15 19:27:19,916 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 19:27:19,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-10-15 19:27:19,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-15 19:27:19,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-10-15 19:27:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:19,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:20,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:20,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856302021] [2021-10-15 19:27:20,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856302021] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:20,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:20,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-15 19:27:20,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266412004] [2021-10-15 19:27:20,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:27:20,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:27:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:27:20,671 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:27:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:34,463 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2021-10-15 19:27:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:27:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-15 19:27:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:34,468 INFO L225 Difference]: With dead ends: 123 [2021-10-15 19:27:34,468 INFO L226 Difference]: Without dead ends: 123 [2021-10-15 19:27:34,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:27:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-15 19:27:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-10-15 19:27:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.8) internal successors, (99), 89 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-10-15 19:27:34,483 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 9 [2021-10-15 19:27:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:34,483 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-10-15 19:27:34,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:27:34,484 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-10-15 19:27:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:27:34,485 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:34,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:34,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-15 19:27:34,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:34,696 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1463238141, now seen corresponding path program 1 times [2021-10-15 19:27:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:34,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639198530] [2021-10-15 19:27:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:34,701 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:34,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:34,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:34,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 19:27:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:27:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:34,939 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 [2021-10-15 19:27:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:34,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:35,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:35,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639198530] [2021-10-15 19:27:35,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639198530] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:35,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:35,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 19:27:35,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142511949] [2021-10-15 19:27:35,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:35,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:35,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:35,013 INFO L87 Difference]: Start difference. First operand 95 states and 104 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, (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) [2021-10-15 19:27:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:35,245 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-10-15 19:27:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:35,247 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, (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 10 [2021-10-15 19:27:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:35,248 INFO L225 Difference]: With dead ends: 91 [2021-10-15 19:27:35,249 INFO L226 Difference]: Without dead ends: 91 [2021-10-15 19:27:35,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-15 19:27:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-10-15 19:27:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 85 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-10-15 19:27:35,271 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 10 [2021-10-15 19:27:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:35,272 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-10-15 19:27:35,272 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, (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) [2021-10-15 19:27:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-10-15 19:27:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-15 19:27:35,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:35,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:35,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:35,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:35,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1463238142, now seen corresponding path program 1 times [2021-10-15 19:27:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:35,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594442411] [2021-10-15 19:27:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:35,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:35,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:35,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 19:27:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:27:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:35,713 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 [2021-10-15 19:27:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:35,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:35,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:35,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594442411] [2021-10-15 19:27:35,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594442411] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:35,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:35,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-15 19:27:35,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466833534] [2021-10-15 19:27:35,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:27:35,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:27:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:35,887 INFO L87 Difference]: Start difference. First operand 91 states and 100 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) [2021-10-15 19:27:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:36,284 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-10-15 19:27:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:36,285 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 10 [2021-10-15 19:27:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:36,287 INFO L225 Difference]: With dead ends: 87 [2021-10-15 19:27:36,287 INFO L226 Difference]: Without dead ends: 87 [2021-10-15 19:27:36,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-15 19:27:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-15 19:27:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 81 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 19:27:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-10-15 19:27:36,296 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 10 [2021-10-15 19:27:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:36,297 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-10-15 19:27:36,297 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) [2021-10-15 19:27:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-10-15 19:27:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:27:36,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:36,298 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:36,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:36,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:36,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1627228125, now seen corresponding path program 1 times [2021-10-15 19:27:36,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:36,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931318220] [2021-10-15 19:27:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:36,513 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:36,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:36,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 19:27:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:27:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:37,023 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:27:37,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2021-10-15 19:27:37,070 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:27:37,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2021-10-15 19:27:37,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-15 19:27:37,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-15 19:27:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:37,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:37,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:37,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931318220] [2021-10-15 19:27:37,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931318220] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:37,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:37,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-15 19:27:37,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238602235] [2021-10-15 19:27:37,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:27:37,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:27:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:27:37,453 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2021-10-15 19:27:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:38,383 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2021-10-15 19:27:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:27:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 [2021-10-15 19:27:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:38,386 INFO L225 Difference]: With dead ends: 99 [2021-10-15 19:27:38,386 INFO L226 Difference]: Without dead ends: 99 [2021-10-15 19:27:38,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:27:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-15 19:27:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2021-10-15 19:27:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 87 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-10-15 19:27:38,399 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 15 [2021-10-15 19:27:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:38,399 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-10-15 19:27:38,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2021-10-15 19:27:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-10-15 19:27:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-15 19:27:38,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:38,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:38,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:38,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:38,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:38,623 INFO L82 PathProgramCache]: Analyzing trace with hash -578453285, now seen corresponding path program 1 times [2021-10-15 19:27:38,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:38,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951820749] [2021-10-15 19:27:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:38,624 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:38,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:38,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:38,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 19:27:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:38,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:27:38,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:39,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-15 19:27:39,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-15 19:27:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:39,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:39,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-10-15 19:27:39,701 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-15 19:27:39,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 40 [2021-10-15 19:27:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:39,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:39,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951820749] [2021-10-15 19:27:39,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951820749] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:39,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:39,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-15 19:27:39,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172568701] [2021-10-15 19:27:39,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:27:39,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:39,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:27:39,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:27:39,867 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:40,662 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-10-15 19:27:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:27:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-15 19:27:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:40,664 INFO L225 Difference]: With dead ends: 110 [2021-10-15 19:27:40,664 INFO L226 Difference]: Without dead ends: 110 [2021-10-15 19:27:40,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:27:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-15 19:27:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2021-10-15 19:27:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 87 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-10-15 19:27:40,679 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 24 [2021-10-15 19:27:40,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:40,681 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-10-15 19:27:40,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-10-15 19:27:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-15 19:27:40,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:40,683 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:40,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:40,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:40,896 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash -578453284, now seen corresponding path program 1 times [2021-10-15 19:27:40,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:40,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871112497] [2021-10-15 19:27:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:40,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:40,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:40,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 19:27:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:41,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:27:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:41,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-15 19:27:41,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2021-10-15 19:27:41,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-15 19:27:41,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-15 19:27:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:41,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:42,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-10-15 19:27:42,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-10-15 19:27:42,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-10-15 19:27:43,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-15 19:27:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:43,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:43,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871112497] [2021-10-15 19:27:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871112497] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:43,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:43,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-15 19:27:43,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297514730] [2021-10-15 19:27:43,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:27:43,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:27:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:27:43,362 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:27:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:44,922 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2021-10-15 19:27:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:27:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-10-15 19:27:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:44,924 INFO L225 Difference]: With dead ends: 105 [2021-10-15 19:27:44,924 INFO L226 Difference]: Without dead ends: 105 [2021-10-15 19:27:44,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:27:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-15 19:27:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-10-15 19:27:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.540983606557377) internal successors, (94), 86 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-10-15 19:27:44,933 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 24 [2021-10-15 19:27:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:44,933 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-10-15 19:27:44,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:27:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-10-15 19:27:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-15 19:27:44,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:44,935 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:44,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-15 19:27:45,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:45,136 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:45,136 INFO L82 PathProgramCache]: Analyzing trace with hash -578467219, now seen corresponding path program 1 times [2021-10-15 19:27:45,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:45,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987233848] [2021-10-15 19:27:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:45,137 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:45,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:45,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 19:27:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:27:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:45,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:45,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:45,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987233848] [2021-10-15 19:27:45,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987233848] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:45,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:45,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 19:27:45,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585989920] [2021-10-15 19:27:45,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:27:45,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:27:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:27:45,608 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:45,713 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-10-15 19:27:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:27:45,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-10-15 19:27:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:45,717 INFO L225 Difference]: With dead ends: 138 [2021-10-15 19:27:45,717 INFO L226 Difference]: Without dead ends: 138 [2021-10-15 19:27:45,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:27:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-15 19:27:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2021-10-15 19:27:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 86 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:27:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2021-10-15 19:27:45,728 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 24 [2021-10-15 19:27:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:45,729 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2021-10-15 19:27:45,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:27:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2021-10-15 19:27:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 19:27:45,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:45,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:45,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:45,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:45,945 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1292973192, now seen corresponding path program 1 times [2021-10-15 19:27:45,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:45,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167723923] [2021-10-15 19:27:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:45,946 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:45,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:45,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:45,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-15 19:27:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:46,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:27:46,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:46,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-15 19:27:46,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 19:27:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:46,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:46,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-15 19:27:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:46,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:46,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167723923] [2021-10-15 19:27:46,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167723923] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:46,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:46,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-15 19:27:46,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548808944] [2021-10-15 19:27:46,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:27:46,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:46,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:27:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:27:46,832 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:27:47,214 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-10-15 19:27:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:27:47,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-10-15 19:27:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:27:47,217 INFO L225 Difference]: With dead ends: 108 [2021-10-15 19:27:47,217 INFO L226 Difference]: Without dead ends: 108 [2021-10-15 19:27:47,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:27:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-15 19:27:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2021-10-15 19:27:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 85 states have internal predecessors, (101), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:27:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2021-10-15 19:27:47,226 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 27 [2021-10-15 19:27:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:27:47,227 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2021-10-15 19:27:47,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:27:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2021-10-15 19:27:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-15 19:27:47,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:27:47,229 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] [2021-10-15 19:27:47,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:47,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:27:47,444 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:27:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash -556090162, now seen corresponding path program 1 times [2021-10-15 19:27:47,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:27:47,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404844667] [2021-10-15 19:27:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:47,446 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:27:47,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:27:47,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:27:47,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-15 19:27:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:47,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:27:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:47,933 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 [2021-10-15 19:27:48,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-15 19:27:48,201 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-10-15 19:27:48,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-10-15 19:27:48,442 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:27:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2021-10-15 19:27:48,820 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:27:48,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2021-10-15 19:27:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:48,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:27:49,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-10-15 19:27:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:49,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:27:49,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404844667] [2021-10-15 19:27:49,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404844667] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:27:49,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:27:49,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-15 19:27:49,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436882449] [2021-10-15 19:27:49,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 19:27:49,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:27:49,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 19:27:49,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:27:49,849 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:28:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:28:02,095 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-10-15 19:28:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:28:02,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-10-15 19:28:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:28:02,097 INFO L225 Difference]: With dead ends: 107 [2021-10-15 19:28:02,097 INFO L226 Difference]: Without dead ends: 107 [2021-10-15 19:28:02,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1401.7ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-10-15 19:28:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-15 19:28:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-10-15 19:28:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.408450704225352) internal successors, (100), 84 states have internal predecessors, (100), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:28:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-10-15 19:28:02,105 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 29 [2021-10-15 19:28:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:28:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-10-15 19:28:02,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:28:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-10-15 19:28:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-15 19:28:02,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:28:02,113 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] [2021-10-15 19:28:02,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:02,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:28:02,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:28:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash -556090161, now seen corresponding path program 1 times [2021-10-15 19:28:02,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:28:02,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896273398] [2021-10-15 19:28:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:02,321 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:28:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:28:02,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:28:02,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-15 19:28:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:02,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:28:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:03,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-15 19:28:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-10-15 19:28:03,254 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 19:28:03,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-10-15 19:28:03,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-15 19:28:03,501 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:28:03,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-15 19:28:03,540 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 19:28:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-10-15 19:28:03,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-10-15 19:28:03,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-10-15 19:28:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:03,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:28:10,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 101 [2021-10-15 19:28:10,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 134 [2021-10-15 19:28:12,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~item~0.base_40 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_append_~item~0.base_40))) (let ((.cse0 (bvadd (_ bv8 32) c_append_~item~0.offset))) (and (= c_append_~plist.offset |c_append_#in~plist.offset|) (= |c_append_#in~plist.base| c_append_~plist.base) (bvule (bvadd (_ bv4 32) c_append_~item~0.offset) .cse0) (bvule .cse0 (select (store |c_#length| v_append_~item~0.base_40 (_ bv8 32)) c_append_~item~0.base)))))) is different from false [2021-10-15 19:28:12,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-10-15 19:28:12,476 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-15 19:28:12,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-10-15 19:28:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:12,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:28:12,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896273398] [2021-10-15 19:28:12,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896273398] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:28:12,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:28:12,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-15 19:28:12,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959194633] [2021-10-15 19:28:12,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 19:28:12,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:28:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 19:28:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=232, Unknown=2, NotChecked=30, Total=306 [2021-10-15 19:28:12,842 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:28:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:28:31,544 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2021-10-15 19:28:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:28:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-10-15 19:28:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:28:31,547 INFO L225 Difference]: With dead ends: 113 [2021-10-15 19:28:31,548 INFO L226 Difference]: Without dead ends: 113 [2021-10-15 19:28:31,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 18631.7ms TimeCoverageRelationStatistics Valid=140, Invalid=512, Unknown=2, NotChecked=48, Total=702 [2021-10-15 19:28:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-15 19:28:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2021-10-15 19:28:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 88 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:28:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2021-10-15 19:28:31,554 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 29 [2021-10-15 19:28:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:28:31,554 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2021-10-15 19:28:31,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:28:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2021-10-15 19:28:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-15 19:28:31,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:28:31,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:31,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:31,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:28:31,757 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:28:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1427463172, now seen corresponding path program 1 times [2021-10-15 19:28:31,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:28:31,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369130489] [2021-10-15 19:28:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:31,758 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:28:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:28:31,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:28:31,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-15 19:28:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:28:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:32,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 15 [2021-10-15 19:28:32,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-15 19:28:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:32,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:28:32,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-15 19:28:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:33,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:28:33,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369130489] [2021-10-15 19:28:33,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369130489] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:33,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:33,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-10-15 19:28:33,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423963258] [2021-10-15 19:28:33,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:28:33,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:28:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:28:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:28:33,151 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-15 19:28:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:28:34,152 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-10-15 19:28:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:28:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-10-15 19:28:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:28:34,155 INFO L225 Difference]: With dead ends: 110 [2021-10-15 19:28:34,155 INFO L226 Difference]: Without dead ends: 110 [2021-10-15 19:28:34,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:28:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-15 19:28:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2021-10-15 19:28:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 87 states have internal predecessors, (101), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:28:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2021-10-15 19:28:34,161 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 28 [2021-10-15 19:28:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:28:34,162 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2021-10-15 19:28:34,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-15 19:28:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2021-10-15 19:28:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-15 19:28:34,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:28:34,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:34,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:34,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:28:34,372 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:28:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:34,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1301685254, now seen corresponding path program 1 times [2021-10-15 19:28:34,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:28:34,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495861828] [2021-10-15 19:28:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:34,373 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:28:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:28:34,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:28:34,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-15 19:28:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:28:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 18 [2021-10-15 19:28:34,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-15 19:28:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:35,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:28:35,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-10-15 19:28:35,410 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-15 19:28:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2021-10-15 19:28:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:35,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:28:35,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495861828] [2021-10-15 19:28:35,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495861828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:35,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:35,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-15 19:28:35,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953610099] [2021-10-15 19:28:35,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:28:35,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:28:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:28:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:28:35,528 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:28:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:28:36,212 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2021-10-15 19:28:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:28:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-10-15 19:28:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:28:36,214 INFO L225 Difference]: With dead ends: 106 [2021-10-15 19:28:36,214 INFO L226 Difference]: Without dead ends: 106 [2021-10-15 19:28:36,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:28:36,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-15 19:28:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2021-10-15 19:28:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.32) internal successors, (99), 86 states have internal predecessors, (99), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:28:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-10-15 19:28:36,220 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2021-10-15 19:28:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:28:36,220 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-10-15 19:28:36,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:28:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-10-15 19:28:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 19:28:36,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:28:36,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:36,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:36,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:28:36,432 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:28:36,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:36,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1697537089, now seen corresponding path program 1 times [2021-10-15 19:28:36,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:28:36,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324878330] [2021-10-15 19:28:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:36,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:28:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:28:36,433 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:28:36,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-15 19:28:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:28:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:36,850 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 [2021-10-15 19:28:37,033 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 [2021-10-15 19:28:37,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2021-10-15 19:28:37,227 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 19:28:37,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-15 19:28:37,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-15 19:28:37,452 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-15 19:28:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-10-15 19:28:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:37,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:28:37,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-10-15 19:28:37,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-10-15 19:28:38,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-10-15 19:28:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:38,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:28:38,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324878330] [2021-10-15 19:28:38,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324878330] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:38,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:38,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 13 [2021-10-15 19:28:38,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940794519] [2021-10-15 19:28:38,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:28:38,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:28:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:28:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:28:38,460 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:28:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:28:43,673 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2021-10-15 19:28:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:28:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-10-15 19:28:43,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:28:43,675 INFO L225 Difference]: With dead ends: 119 [2021-10-15 19:28:43,676 INFO L226 Difference]: Without dead ends: 119 [2021-10-15 19:28:43,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-15 19:28:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-15 19:28:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2021-10-15 19:28:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 85 states have internal predecessors, (97), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:28:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2021-10-15 19:28:43,683 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 30 [2021-10-15 19:28:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:28:43,683 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2021-10-15 19:28:43,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:28:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2021-10-15 19:28:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 19:28:43,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:28:43,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:43,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:43,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:28:43,896 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:28:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1697537088, now seen corresponding path program 1 times [2021-10-15 19:28:43,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:28:43,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467950232] [2021-10-15 19:28:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:43,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:28:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:28:43,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:28:43,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-15 19:28:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:44,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:28:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:28:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:44,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:28:44,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-15 19:28:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:28:44,821 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:28:44,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467950232] [2021-10-15 19:28:44,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467950232] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:44,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:44,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-15 19:28:44,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424780195] [2021-10-15 19:28:44,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:28:44,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:28:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:28:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:28:44,823 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:28:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:28:44,892 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-10-15 19:28:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:28:44,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-10-15 19:28:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:28:44,894 INFO L225 Difference]: With dead ends: 93 [2021-10-15 19:28:44,895 INFO L226 Difference]: Without dead ends: 93 [2021-10-15 19:28:44,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:28:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-15 19:28:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2021-10-15 19:28:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 70 states have (on average 1.2) internal successors, (84), 76 states have internal predecessors, (84), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:28:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-10-15 19:28:44,901 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 30 [2021-10-15 19:28:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:28:44,902 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-10-15 19:28:44,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:28:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-10-15 19:28:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-15 19:28:44,903 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:28:44,904 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:44,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:45,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:28:45,116 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr29ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-10-15 19:28:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash -840371735, now seen corresponding path program 1 times [2021-10-15 19:28:45,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:28:45,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819698861] [2021-10-15 19:28:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:45,117 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:28:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:28:45,119 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:28:45,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-15 19:28:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:28:45,664 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:28:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:28:45,853 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-15 19:28:45,853 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:28:45,854 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr29ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:28:45,857 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 19:28:45,857 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 19:28:45,857 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 19:28:45,858 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 19:28:45,858 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,858 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,858 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-15 19:28:45,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-15 19:28:45,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-15 19:28:45,859 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-15 19:28:45,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-15 19:28:45,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-15 19:28:45,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,860 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,861 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,861 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-15 19:28:45,861 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-15 19:28:45,861 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-15 19:28:45,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-15 19:28:45,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-15 19:28:45,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-15 19:28:45,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-15 19:28:45,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-15 19:28:45,863 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,863 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,863 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:28:45,863 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-15 19:28:45,864 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-15 19:28:45,864 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-10-15 19:28:45,864 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-10-15 19:28:45,864 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-10-15 19:28:45,865 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-10-15 19:28:45,865 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-10-15 19:28:45,865 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-10-15 19:28:45,865 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-10-15 19:28:45,865 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-10-15 19:28:45,866 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-10-15 19:28:45,866 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-10-15 19:28:45,866 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-10-15 19:28:45,866 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-10-15 19:28:45,867 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-10-15 19:28:45,867 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-10-15 19:28:45,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:28:46,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:28:46,095 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:28:46,110 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-15 19:28:46,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:28:46 BoogieIcfgContainer [2021-10-15 19:28:46,135 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:28:46,136 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:28:46,136 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:28:46,137 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:28:46,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:27:17" (3/4) ... [2021-10-15 19:28:46,141 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:28:46,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:28:46,142 INFO L168 Benchmark]: Toolchain (without parser) took 90799.63 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 52.5 MB in the beginning and 62.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:46,143 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory was 70.4 MB in the beginning and 70.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:28:46,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 809.33 ms. Allocated memory is still 88.1 MB. Free memory was 52.3 MB in the beginning and 65.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:46,144 INFO L168 Benchmark]: Boogie Preprocessor took 101.36 ms. Allocated memory is still 88.1 MB. Free memory was 65.4 MB in the beginning and 62.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:46,144 INFO L168 Benchmark]: RCFGBuilder took 1273.58 ms. Allocated memory is still 88.1 MB. Free memory was 62.3 MB in the beginning and 66.0 MB in the end (delta: -3.6 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:46,145 INFO L168 Benchmark]: TraceAbstraction took 88601.79 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 65.5 MB in the beginning and 62.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:28:46,145 INFO L168 Benchmark]: Witness Printer took 5.07 ms. Allocated memory is still 121.6 MB. Free memory is still 62.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:28:46,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory was 70.4 MB in the beginning and 70.2 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 809.33 ms. Allocated memory is still 88.1 MB. Free memory was 52.3 MB in the beginning and 65.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 101.36 ms. Allocated memory is still 88.1 MB. Free memory was 65.4 MB in the beginning and 62.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1273.58 ms. Allocated memory is still 88.1 MB. Free memory was 62.3 MB in the beginning and 66.0 MB in the end (delta: -3.6 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 88601.79 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 65.5 MB in the beginning and 62.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.07 ms. Allocated memory is still 121.6 MB. Free memory is still 62.0 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.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: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; VAL [\old(c)=13, c=0] [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [\old(c)=0, c=0, length=0, list={31:0}] [L544] CALL append(&list) VAL [\old(c)=0, c=0, plist={31:0}] [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={31:0}, plist={31:0}] [L533] item->next = *plist VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={31:0}, plist={31:0}] [L534] EXPR item->next VAL [\old(c)=0, c=1, item={1:0}, item->next={0:0}, plist={31:0}, plist={31:0}] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={3:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={3:0}, plist={31:0}, plist={31:0}] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={3:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={3:0}, plist={31:0}, plist={31:0}] [L537] *plist = item VAL [\old(c)=0, c=1, item={1:0}, plist={31:0}, plist={31:0}] [L544] RET append(&list) VAL [\old(c)=0, c=1, length=0, list={31:0}] [L545] length++ VAL [\old(c)=0, c=1, length=1, list={31:0}] [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [\old(c)=0, c=1, length=1, list={31:0}] [L548] COND FALSE !(length < 0) VAL [\old(c)=0, c=1, length=1, list={31:0}] [L551] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}] [L551] EXPR list->next VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, list->next={0:0}] [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, next={0:0}] [L552] free(list) [L553] list = next VAL [\old(c)=0, c=1, length=1, list={31:0}, next={0:0}] [L554] length-- VAL [\old(c)=0, c=1, length=0, list={31:0}, next={0:0}] [L556] COND FALSE !(length > 0) VAL [\old(c)=0, c=1, length=0, list={31:0}, next={0:0}] [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [\old(c)=0, \result=0, c=1, length=0, next={0:0}] - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 122 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 88465.1ms, OverallIterations: 16, TraceHistogramMax: 2, EmptinessCheckTime: 61.5ms, AutomataDifference: 56786.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 859 SDtfs, 1092 SDslu, 3219 SDs, 0 SdLazy, 2956 SolverSat, 154 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 42118.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 682 GetRequests, 522 SyntacticMatches, 12 SemanticMatches, 148 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 23696.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=0, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 186.0ms AutomataMinimizationTime, 15 MinimizatonAttempts, 199 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 219.0ms SsaConstructionTime, 1317.2ms SatisfiabilityAnalysisTime, 22780.0ms InterpolantComputationTime, 361 NumberOfCodeBlocks, 361 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 624 ConstructedInterpolants, 34 QuantifiedInterpolants, 6181 SizeOfPredicates, 117 NumberOfNonLiveVariables, 2097 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 30 InterpolantComputations, 26 PerfectInterpolantSequences, 8/28 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 [2021-10-15 19:28:46,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097253e8-4ba7-443f-b380-8db2ed3badf4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...